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Custom tune

Kenne Bell_Boost-a-Pump


Whipple idler pulley

Cold air intake

Oil separator

Oil pump

Oil pan

Oil filter




Engine development

The Terminator's 4.6L Dual Overhead Cam (DOHC) V-8 engine went through quite the process before it was finally signed off for the masses. Although it was the first production Mustang with a supercharger, it was not the first Mustang to be developed by SVT with forced induction. Actually, before the Special Vehicle Team, there was Special Vehicle Engineering, or SVE, and it was their development mule in the late-90's known as the Super Stallion that gave enthusiasts a glimpse of the future for the Cobra (you can also see it in action on YouTube!). Its 5.4L V-8 was a bit optimistic, but the supercharger, IRS, and big brakes - among many other refinements - were definitely a hint of what was in store. When it came to the newest Cobra, one thing was for certain: customers wanted more power, and SVT delivered.

After unsuccessful attempts to improve the Cobra's performance in a naturally-aspirated fashion, the decision was made to supercharge the 4.6L engine - no surprise - and it was accomplished in record time. Adding to that, these engines had to meet the higher power levels and they, along with the vehicles, had to be built on current assembly lines - not always a small task for a niche vehicle. Early on, the first engines were assembled using the previous aluminum block and powdered metal rods, along with an Eaton supercharger that was a derivative of what was being used on the 1999-2004 F-150 Lightning. With deadlines looming, existing heads were also chosen rather than developing new ones. For more information on those heads (and blocks), be sure to visit my Castings page, or click on the image of the display engine at the top of the page.   


As it is commonly known, the existing rods turned out to be the weak link, leading to the saving grace of the forged Manley "H-beam" version after many of the test engines were destroyed (remember the picture of John Coletti with the new "trophy"?). The forged steel - and essentially indestructible - "C38 micro-alloy" Kellogg crankshaft, which had been the norm since it went in to service with the '96 Cobra, was also thankfully retained (available at one time through FRPP as M-6303-S46). This was all in conjunction with new 343 gram forged aluminum pistons, utilizing Sealed Power rings, with a supercharger-friendly 8.5:1 Compression Ratio - also an off-shoot from the Lightning program. The decision was then made to use the current - and heavy - iron block for "durability", especially since "time constraints" would not allow the development of a new aluminum block.

Interestingly enough, the Manley 4340 alloy steel forged rods look identical to those made by Carrillo, which were used in the 2000 Cobra R. With that program, the engine was actually developed separately by Ford's Engine Manufacturing Development Operations (EMDO), whereas with the Terminator, it was essentially "in-house" (as a friend who worked at SVT mentioned, "...politics"!). Nonetheless, the new rods gave Manley a bump in recognition, making their name synonymous with Terminator power. It also cannot be overlooked that the rods were equipped with ARP 8740 Chrome Moly bolts - yet another premium part right from the factory!

Note: The new pistons had their roots in a company called Zollner. Back then, however, they had been bought by Karl Schmidt Unisia (a subsidiary of Germany's Kolbenschmidt Pierburg AG) and were manufactured in Ft. Wayne, Indiana. While many believe the original supplier was Mahle, that is the case only for the Ford remanufactured engines and some produced by Ford Racing. For more trivia, the late Fred Zollner, founder of Zollner Pistons, also founded the Ft. Wayne Zollner Pistons professional basketball team in 1941. The team was eventually expanded and moved to southeast Michigan in 1957, where they still remain today as the Detroit Pistons. 

At the time, the 390 horsepower and 390 lb/ft of torque rating was definitely a step up to old-school muscle-car days, especially with the flat torque curve. With a specific output of almost 85 HP/Liter, the Terminator engine was almost twice as powerful as the 1993 Cobra (see both charts below) and had 70HP more than the 2001 model. Ironically, modern engines have surpassed these power levels without forced induction, but it still doesn't detract from the Terminator being an absolute hit - then, and still to this day. Not only was the performance phenomenal, it was an absolute bargain. As John Coletti mentioned when comparing it to the previous Cobra, "...the cost for a user to upgrade a 2001 Cobra to the level of the Terminator—rebuilding the engine with competition quality components, adding an Eaton supercharger, improving the independent rear suspension—would be substantially over $10,000...", which was more than double the increase in price from 2001. A bargain for sure.

As fantastic as the Terminator engine turned out, especially since so many are still in service with some high miles, there is no doubt that some owners can't resist turning wrenches. As most of us have discovered, we've taken an already amazing car and customized to our own liking, usually with new-found power levels. Mine has been no different, but even with modifications that wouldn't necessarily be deemed exotic, the power has jumped considerably and made a car that is already a blast to drive, even more so.

For more depth (and more than I can ever cover here), be sure to pick up Iron Fist, Lead Foot, especially to see some great pictures of the Romeo Niche Line where the engines were hand built north of Detroit. For another neat look at the assembly of the engine, also check out Romeo Must Supply on the internet. Also, don't hesitate to grab the old old press releases and tech data from my SVT Documents page, along with the Press Kit to see more of the details from back then.

Incidentally, you could actually buy the complete engine at one point new from Ford Racing as M-6007-SC46, or even remanufactured from Ford as 2R3Z-6006-AARM, but both have been discontinued. If you need a complete engine, you are left sourcing one used or tackling the re-build yourself. If you are up to working on it, be sure to have a Ford service manual (see my SVT Documents page as well). Otherwise, the excerpts listed below will make for some light reading to get you started, along with a couple cool drawings of the engine - just for the heck of it.

Cobra Engine General        Cobra Engine Assembly        Cobra Engine Disassembly

Cobra Auxiliary Crank Pulley        Cobra Heads Assembly & Disassembly


Note: If you're serious about building a DOHC engine, or just working on one, there are also a bunch of "Special Service" tools listed in the service manual that make the process much easier. For my Aluminator build, I picked up a cam tools kit (#6498) from OTC Tools, along with their flywheel holding tool. Also, there are the engine lift brackets under the Rotunda part numbers 303-D087 and 303-D088 (which differ from the DAP lift brackets) - a nice score, but not a must-have. Another recommended item is a universal valve spring compressor from Freedom Racing that is a necessity to re-install the cam followers after dialing in the cams (more stuff to buy there!). If you are going to put any time and money in to your engine, there is no sense in cutting any corners when it comes to equipment!


Ported Eaton

The Eaton supercharger was first used on the Thunderbird Super-Coupe in the late 80's and has traveled quite the distance since then. Even though the previously mentioned Super Stallion was headed in the right direction with a Garrett supercharger, it was Eaton for the Terminator! The new version, again adapted from the Lightning, is the "M112", for 112 cubic inches of additional displacement (or approximately 1.9 Liters). These positive displacement, or "Roots" superchargers take the intake air and move it within the case, actually along the outside of the two counter-rotating three-lobe rotors, and force it in to the engine - literally a "blower". Boost is built because more air is being pumped in than out. Simple, effective, and economical.

Taking a slight step back, this is in contrast to something like the newer Twin Vortices Series (TVS) superchargers made by Eaton for the GT-500, as well as the newest Roush-developed kits from VMP Performance. The TVS utilizes an entirely new rotor twist - 160° versus 60° - which actually compress the air in between the four-lobe rotors rather than forcing it around them. This design is not only more efficient in that it provides more boost, it takes less energy to run and actually does so with a lower temperature than the roots. The images below show the difference in the rotor packs, but also give a nice look at the internal components as a general reference (the Terminator Roots housing would look similar when it is apart).

In addition to the TVS, there is also even the "Twin-Screw" from companies like Kenne Bell, Whipple, or Lysholm which compresses the incoming air in a similar fashion. For a great explanation of the difference between the two designs, Kenne Bell has written Twin Screw vs. Roots, and for basics on supercharging, they've added another on Supercharger Efficiency - both well worth reading. Along with those, I dug around on the internet and found a neat TVS presentation from Eaton that gets in to the history of the Roots, along with more on the TVS (oddly enough, it leaves out any mention of the Terminator). Also, if you are still a fan of the Eaton, check out U.S. Patent 5,083,907 - more neat trivia.

Note: For a while, there was a partnership between Whipple and Ford Racing for the Terminator. The 2.3L unit was available in standard black as M-6066-CT46 and M-6066-CT46HP, or polished as M-6066-CT46P and M-6066-CT46PHP (the "HP" versions were for a single-blade throttle body). Unfortunately, the availability through FRPP - which was a great deal - is no more (feel free to speculate there!). The CT46 was also the one used on the 690HP Ford Racing Cobra that was developed with SVT back in the day, so there definitely was a great backing at one time. Also, if you happen to own a Whipple and need to replace the unique FRPP label that came on those housings (or add it for the heck of it!), not to worry, they are still available if you are a fan.

Anyway, since I wanted to retain an OEM look, am fine with the unique Eaton sound, and was not on a quest for huge power with an aftermarket supercharger, a perfect option was to port the stock case. Actually, a buddy of mine had been dabbling with the "home port" method with success, so he did his thing for me with great results. The pictures below show the bottom of the case along with the "drops" at the back, adjacent to the inlet (which is also smooth as glass). Granted it is not machine precise, but it sure made a big difference, and I would imagine it is somewhat close to matching the flow of a "professional" porting job. If you are curious how this would stack up to one of those, a comparison photo shows how similar they really are. Not bad at all.

Along with porting, I also removed the factory 3.65" (93mm) drive pulley and added a 2.93" (74mm) pulley which was stock on the Lightning (actually, a friend local to me stopped by and loaned a hand with this - thanks, Scott D.). Here, the original 8PSI rating has been bumped to a max of about 13PSI in conjunction with the stock 7.65" lower pulley, which has really woken up the engine. While there are plenty of pulley combinations, I liked the idea of staying with an "OEM" part that would still provide an increase in performance without running off the efficiency map. It's not as exotic as one the TVS or Twin-Screw superchargers, but if you are looking for an extra blast without draining your wallet, don't discount this route. So far, I've been very happy with it, especially since it's made the car quite the beast compared to the day it left Dearborn!

As for the efficiency, or "performance" map of the M112, one is shown below. This graphic tops out at a "Pressure Ratio" of 2.0, which equates to approximately 15 PSI of boost (14.7+15 / 14.7 = 2.02). The rings represent Thermal Efficiency, the smallest being 62%, and expanding outward, indicating an increase in temperature with both boost and RPM (green dashed lines) based on intake air flow. The red lines I added indicate the Pressure Ratio with the factory 8 PSI pulley along with the new one, which in my opinion is perfect. From the chart linked in the above paragraph, at an engine RPM of 6,500, the maximum blower speed is almost 17,000 RPM - off the map and hot! There is just no escaping the fact that it puts out decent amount of heat when run hard. They don't call it the Heaton for nothing. 

Note: When it comes to removing and installing the snout pulley, it helps to have the right tool (no, that is not a three-jaw puller from AutoZone). Probably the best one out there comes from BilletFlow, although there are others that are similar and probably work just fine. If you happen to have the snout off, a press can also be used, which is how the Ford GT Power Upgrade Kit instructions would have you go about it. It's a bit different, but it does the trick! There are also plenty of kits that have hubs that use bolt-on pulleys, so those are also a decent choice if one wants to experiment with different boost levels.

Since I made it a point to praise the home-porting job, it's also worth bringing up some details that involve taking the case apart, although it really isn't too complicated of a process. The snout comes off first (eight bolts), then the gear and rotor pack assembly pulls out separately and leaves you with the empty case. In order to put the housing back together, you just use an anaerobic sealant such as Loctite 518 (or Motorcraft TA-16) to form a gasket between the snout and rotor pack (shown in the pictures below), then torque the bolts back down in an alternating fashion. They are 5/16" bolts if I recall correctly, so 18 ft/lbs worked just fine. There are also two bearings in the back of the case that support the rotors, so be sure to keep them clean and add new grease (I used Mobil1) before re-installation.

If the snout is off and you discover a worn "coupler" (small disc that mates the timing gears and input shaft), they are not that expensive and easy to swap out. The coupler can be seen in the thumbnail, and in the pictures above if you are still wondering what it is. Also, take a look at the gears in above Eaton and notice they are straight cut compared to those in the TVS or Twin-Screw, which are helical. There's your source for the unique under-hood "whine" the Terminator is known for!

So far, I've had a few of these apart, and have found that most parts are quite stout - including the coupler. Not to worry, though, replacement parts are easily acquired from places like ZZ Performance, or Superchargers Online if necessary. If a complete overhaul is in your future and you aren't the DIY type, I've heard good things about Jon Bond Performance (they sell parts as well), and I believe Magnuson also provides this service. By the way, if you are fiddling with the snout in any way and lose the drain plug in the front, not to worry: it can also be scored from any of the above vendors, as well as through Ford as XL3Z-6A828-AA.

Once you decide to remove the supercharger, whether to do like I have or simply to upgrade, it also helps to have the factory service procedure - plenty of detail and all the torque specifications. The whole assembly is not difficult to pull out, especially if it is done complete with the lower intake attached as when originally installed, but like everything with this engine, plan ahead and be prepared. For a bit extra, the diagrams below also give a detailed look at all the associated vacuum and electrical connectors - definitely worthwhile to have when you start taking it all apart.


Note: The original oil in the snout is produced by Nye Lubricants, of Fairhaven, MA. It is listed as their "605" oil, which is the EXACT same fluid that can be purchased through GM as their part number 12345982 (AC Delco 10-4041), or through Ford as the Motorcraft XL-4 - which is about twice the price. This ester oil, which is similar to jet engine oil, has the approximate viscosity of a 20-Wt motor oil, although its properties are not the same. Some guys still insist that regular 30-Wt motor oil is the way to go, but ask an Eaton engineer, and they'll tell you different. Also, it is considered lubed for life, but chances are, most will change it out at least once, if not on some sort of a regular interval. Why be cheap - the required TWO bottles (approximately 8 Oz.) of the fluid from GM is only about $20!


Custom tune

When I decided to go with a ported supercharger and smaller drive pulley, it was obviously going to require a new tune in order to run properly. While there are plenty of generic tunes that can by purchased along with various hand-held tuners from a number of vendors, I decided to go with one that was custom, and it couldn't have turned out better. One tuner out there that was still quite active and spoken well of, is Eric Brooks, the owner of BrooksSpeed (and former owner of the ModularFords web site), who now works with HP Tuners.

Although Eric runs his business in a separate state, I wanted to mention that all the tuning he did for me was accomplished remotely. He really nailed it (my AFR at WOT, for example, was a perfect 11.5), and the engine ran beautifully. It did take effort on my part in the form of some data-logging using the SCT LiveLink software, but I was real happy with the results. So far, so good.

Fast forward to late 2016, and with the new Aluminator, a custom tune was in order (my original engine is still perfect, by the way - it didn't get blown up!). This is especially necessary with the switch to the FRPP 60pph injectors (M-9593-LU60), along with the other upgrades. As much as I appreciated the OEM drivability so far, I did have to load a temporary tune to compensate for the additional fuel so the idle quality wouldn't suffer. This was not a big ordeal, and gave me the opportunity to do some driving over the summer. After about 400 miles of "break in", it was now time to get serious!

From here, I have to thank Jeff Chambers of CRT Performance in Norwalk, Ohio for not only getting my Cobra up on his dyno, but his expertise in writing an amazing tune. I did drag my feet slightly, but the weather cooperated perfectly, and on November 1st I was able to make the trek to his shop so he could work his magic. The new tune is perfect, and the driveability is still just as good as the first time around. Even better, with the extra power under the hood, coupled with the weight reduction up front, the car is even more of a blast to drive. Not only does Jeff do great work on the dyno, he also tunes remotely, so if you are in need of some wizardry, don't hesitate to give him a shout.

The graphs above show the final output, which were achieved just shy of 6,500RPM (I decided not to pursue a higher RPM and additional timing). The output on the Mustang Dyno is a respectable 473 RWHP and 450 LB/FT of torque. This was also with just over 13 pounds of boost, and a WOT AFR of 11.3:1. Taking in to account the slight difference between this type of dynomometer and a DynoJet, then applying a correction for drivetrain loss (multiplied by 1.12 then 1.15), this gave me a very respectable power level that is right around 600 at the crankshaft - absolutely perfect, and a nice step up from the factory specs! It's an amazing machine that is even more fun on those real world roads.

Note: Along with a custom tune, one add-on that was required when using the stock 90mm Mass Air Flow (MAF) sensor is the now extinct DiabloSport MAFia calibrator. Since the MAF reads voltage based on air flow, this device allows the tuner to adjust the voltage signal within a range that will be correctly interpreted by the computer, alleviating the need to upgrade the MAF completely. I had acquired their model F7373, and it was one more piece that has always made the tuning flow smoothly! 


Kenne Bell Boost-a-Pump

With an increase in boost (and air flow), one cannot overlook necessary upgrades for the fuel system. Since the OEM pumps are "Pulse Width Modulated", or PWM, their speed (i.e., flow) is simply a function of supplied volts, coming in pulses - hence the term. In this "Returnless" fuel system, the Electronic Control Module (ECM) monitors fuel rail pressure via the Fuel Rail Pressure Sensor (FRPS), then tells the Fuel Pump Driver Module (FPDM) what voltage is needed to adjust the flow of the pump(s) in order to feed the injectors. Pretty straight forward.

The Terminator pump assembly actually consists of two pumps, which is fairly common knowledge. They flow at 119LPH (Liters Per Hour) each - 238LPH total - and are matched to 39PPH (Pounds Per Hour) injectors in stock form. The original injectors are easily identifiable by their blue color, and used to be sold individually as 2R3Z-9F593-BA (Motorcraft CM-5026) or through FRPP as M-9593-M39 in a set of eight, but they are another obsolete part. The pump assembly once carried the FRPP part number M-9407-C46, but it is only available through Ford now: 2R3Z-9H307-AB (Motorcraft PFS-200). It was ridiculously expensive at around $1,600, but I believe it is also the Airtex E2432S, which can be scored for about a third - if you need the stock components.

While I'll claim to be far from an expert at the modification of fuel systems, I knew I would have to get more fuel to the engine to go along with the supercharger upgrades. Fortunately, the nice people at Kenne Bell have developed their "Boost-a-pump", or BAP, to "boost" the flow rate of the factory pumps. This also alleviates the need to drop the fuel tank, so that is a bonus (not that dropping the tank is that difficult). The BAP increases the voltage to the pumps, which in turn increases their RPM's, thus providing more fuel flow - up to 378LPH now. I had absolutely no need to eschew the factory system in favor of one that is "return" style with "upgraded" pumps, especially since they seem to cause more problems than they solve... 

I knew the BAP would be a perfect addition (KB89069: 17.5V, 40A version, by the way), and it has performed flawlessly so far in conjunction with the custom tune. Again, I'm no expert here, but considering there are a ton of them out there doing their thing, I had no doubts about its abilities. While some people consider it nothing more than a "Band-Aid", I'm amazed that I've never heard one complaint about them failing or not functioning properly (unless the person wiring it is an idiot). In any case, mine wired up in short order, which was not complicated at all. The picture above shows how I set it against the fender liner in the trunk, secured with 3M Dual-Lock fasteners, and tapped in to the harness coming out of the FPDM. The controller is also visible behind the fuel-pump inertia switch. Once it is all hooked up, the last "modification" that is required is to remove the original 20A fuel pump fuse in the Power Distribution Box (adjacent to the battery), and replace it with one that is 30A - very important!

On that note, a debate has raged on for years as to how to "properly" wire them in (connector C433): upstream of the FPDM or downstream. The original KB instructions show it spliced downstream (the brown/pink wire), and that is how mine has been since day-one with absolutely zero issues. From what I understand, this method allows operation of the BAP as-needed with direct power to the pump(s), whereas splicing it in upstream of the BAP (green/yellow wire), sets control of it via the tune through the FPDM. I believe KB wants it wired upstream when they supply the tune with one of their supercharger kits, but I can't be absolutely sure of that. Maybe Eric wrote my tune knowing I wired downstream, but I never did ask and have never felt the need to inquire. No matter, mine has never given me any trouble, and amazingly enough, I didn't have to add the "popular" wire "upgrade" kits that seem to be all over various forums.

I should also mention that I did experiment with the "Hobbs" switch that I tapped in to my boost line (the yellow one behind the glove box), but didn't have any luck with it. As it turns out, I was getting a sputter at high RPM's, so I removed it right away and used a jumper for that wire which is fairly common. The BAP is now running full-time with its controller set at about 45%, which seems to be right in the sweet spot. Oddly enough, I believe the newest kits don't even use the controller any longer, yet still retain the Hobbs switch, but that isn't anything I've bothered to verify. 

For what it is worth, I dug up as much tech as I could on the BAP (and fuel system), including their instructions and supplement for the Cobra, and have linked them below. If you already have one or are considering it in the future, it is all well-worth checking out. Then again, if you think you'll have to gut your fuel system and start it over, you'll probably be out of luck here.    

BAP Theory    BAP Tech    KB Fuel Pump Tech    BAP Instructions   

Cobra Supplement    Mustang Wiring Diagram

Note: When staying with the factory returnless fuel system, it is not unheard of that spikes in fuel pressure can damage the FRPS. Although Kenne Bell makes a small disc that fits underneath it, allegedly to limit the bursts, I haven't felt the need to add it. Once the FRPS fails, though, you are out of commission until it is replaced (a great reason to have a spare in the car at all times). If you need to pick one up through Ford, the part number is 3R3Z-9F972-AA, and they generally go for between $115 to $150. On a better note, there is a way to get them new for right around $75 all day long: pay a visit to a local Land Rover dealer (or find one on the internet). Yes, the Ford FRPS is actually sold by Land Rover under their part number 4458309 for the supercharged Range Rover. Same exact part, just a different box. You're welcome!


Throttle body & plenum

With the supercharger moving more air, it only made sense to consider an upgraded throttle body, especially since an engine is just a big air pump. The factory twin-57mm piece isn't actually all that bad, but opening up the intake tract even more with a single-blade throttle body (SBTB) definitely has improved the throttle response and added some more power. Since the SBTB flows over 1600 CFM of air compared to about 1100 for the stock TB, that only makes sense (well, if your blower can support that flow rate).

I happened to have snagged a like-new version that came from Lightning Force Performance, and since it fell in to my hands for a great deal, it was hard to resist. It really is a nice part that has worked well with just one very minor issue (addressed below). While I slacked and never bothered to get side-by-side comparisons, I was fortunate enough to acquire a picture from someone else who did the same modification, so the difference in the two can be clearly seen below.

There are also other versions of the SBTB's out there from places like BilletFlow, AccuFab, and Dragon, but this one has suited me fine for several years so far and still gives me a factory-like idle. Mine was actually added after Eric Brooks wrote my custom tune, yet required NO additional tweaking of the tune to function properly. The one issue I did have off the bat was the weak return spring, but that has been fairly common in these. If the spring does not produce enough force to keep the blade shut, your idle will suffer since it will tend to shift randomly - definitely annoying. Adding to that, the accelerator pedal will feel odd since the resistance will be way too light, almost as if it is attached to nothing at all.

Fortunately, the solution is simple: a single "helper" spring attached between the throttle cable bracket and the actuator arm. This idea actually came from BBK Performance, since it is part of their 65mm dual-blade version. They also provide instructions, which requires a slight modification to the throttle cable bracket but is nothing complicated. I picked up a two-pack of springs at my local Lowe's, and once I attached one, the pedal feel was just like the original. Even better, the idle has been perfect ever since.

Overall, the throttle response is much crisper and the extra breathing is a bonus when having a little fun on the road. It's easy horsepower for a cost that is reasonable, so even better. While some guys will simply choose to port and smooth out the original, I'll take an aftermarket one any day. Did I mention that I didn't need to have my tune tweaked to use it!?!? 

Note: When I picked up the new TB, I also scored a plenum from Accufab Racing. I could have used it in its as-is polished state, but I wanted it to have more of an OEM look to coincide with the Eaton housing. Luckily enough, a local automotive paint shop had a way to match the housing paint with a custom formula that is essentially exact. With this, it's easy enough to have more paint made at any time. Once you look at the specs, you might get a laugh out of the name, but it does look great!


Whipple idler pulley

Once the original drive pulley is swapped out for a smaller one, it either means that a shorter belt is needed, or the original 75.5" belt can be retained and wrapped tighter with an auxiliary idler pulley. These auxiliary idlers are commonly known as "snub idlers", and are mounted right below the supercharger snout on the pulley bridge. If you happen to stay with the Eaton blower, this is also generally accompanied by a removal of the factory pulley cover - liked by some and gladly tossed by others.

There are a few choices for snub idlers, with the popular ones coming from Metco Motorsports, BilletFlow, and even Steeda, but I chose a different route and went with a stealthy "hidden" version by Whipple: their 464-ADJID kit (also shown below left and in the thumbnail above). Actually, I don't know if this kit is even available any longer, but a search under the part number did turn up several internet vendors that still list it. It's a bit on the expensive side (around $250!), but I got my hands on one for much less and couldn't resist. In any case, it actually sits beneath the snout and can be completely invisible up if you are still under Eaton power and retaining the cover. Since I happened to have the FRPP cover (shown at the bottom of this page), this was ideal.

With regards to the pulley bridge mentioned above, I wanted to also be sure and point out a component of it that tends to take a beating: its belt tensioner. Originally, the bridge and tensioner were sold by Ford as a single unit, which was ridiculously expensive, but is now obsolete anyway. If your tensioner there needs to be replaced, not to worry, it is the same one used on the Lightning pickup and is still available. You can score it usually for around $50, listed as the Motorcraft BT-63 or through Ford as 1L3Z-6B209-BA. Definitely a good idea to have a spare.

Back to the factory cover, I did briefly use one of the snub idlers but since I prefer having the cover (the Eaton just looks weird without it), a bit of modification allowed me to keep it on and partially hide the idler. The picture above right shows the modified cover - notched, re-painted, and almost looking completely original. Although I ultimately acquired the Whipple idler, the temporary use of the BilletFlow version still worked when I needed it.

As another alternative, there are options to simply use a shorter belt and no additional idler, but there is always the chance of belt slip if it doesn't fit perfectly. For reference, Metco has a nice belt chart that will help get anyone in the ball park if you go that route (alternatively, that information plus more about belts is available on their web site). Also, the original belts from Ford are 2R3Z-8620-AC (Motorcraft JK6-966A) which is the Primary, and 2R3Z-8620-BC (Motorcraft JK8-755) which is the Secondary - for the supercharger. There are also plenty of aftermarket versions available, so if you want to keep it simple, a belt swap is about as easy as it gets!

Note: As with the snub idler, the same companies - and some others - also make replacements for the stamped steel factory parts. The Ford idlers (Motorcraft YS-250 or Ford F65Z-8678-AAA) come in at 90mm and are easily replaced with the stronger versions in billet aluminum. If your OEM pulleys are still in fine shape and might just need new bearings, not to worry - those are acquired easily enough under the 6203-2RS spec (17x40x12mm). I recently replaced my own pulleys with a set from VMP - shown in the picture above - which not only look great, but are ridiculously solid (these are also similar to the ones sold by Billet Pro Shop). Opinions may vary on the sizes, but I used two 100mm and one 90mm, which was perfect. If you are ready to upgrade, especially if the extra one on the primary belt needs replacing, get ready for some work though: the crank pulley cage removal can sometimes make this a heck of a job!


Cold air intake

A less restrictive air intake is right up there with an aftermarket exhaust when it comes to moving more air through the engine, especially when the supercharger has been upgraded. There are a handful of kits out there, some that use "open" filters, and others that tuck the filter under the fender in one way or another. As 2016 rolled on, especially with the new engine alive and ticking, I decided it was time for an upgrade here as well.

While I had originally been fine with the K&N FIPK (Fuel Injection Performance Kit) 57-2545, I will admit that it was sucking in a bit more hot air than I was content with. Even though it contains a shield - which some kits out there lack - the dome of the Cobra R hood did not allow it to seal sufficiently (and it was debatable if shielding did anything at all under even the stock hood). While sitting at idle on a hot day, the inlet (IAT1) and downstream (IAT2) air temperatures would climb drastically, both approaching 150°. I had definitely dragged my feet on an upgrade for far too long.

Next up, a fender mounted cold air intake (CAI) courtesy of the former Tunable Induction. On a sad note, the owner passed away in October '16, which led to the business shutting down. This is real unfortunate since they were nice kits, but I'm glad I had picked one up last year, despite taking my time getting it installed. Anyway, for those that have been around the Mustang world for an extended period of time, this would probably be recognized as the DenseCharger, originally conceived by John DeMolet back in 2001. These kits use real heavy ABS plastic (as opposed to thinner molded tubes) and do a nice job of keeping the intake charge insulated from engine bay heat. Even better, installation was simple and it looks nicer under the hood than an open filter. 

Note: As shown in the picture above, left, the filter is obviously green. Simple enough, it comes from a company called Green Filter USA. The supplied filter is their part number 2374, coming in at just 6" tall with a 4.5" inlet (not one of their giant versions, but I will probably step up soon enough). With the unique color of this filter, it was also pertinent to pick up a cleaning kit, which was easy thanks to Summit Racing. Interestingly enough, Green Filter is also a supplier for the new Ford GT race car - a testament to the quality of their products!

With this new intake installed, as I expected, the IAT1 levels were pretty consistent with matching the ambient air temperature - no surprise considering the filter is tucked away under the fender. When it came to the IAT2 levels, it was a bit different. During "normal" driving, even on a hot day, readings around 110° - give or take - were pretty common. Once at idle, however, that number would creep up over 130° - still slightly lower than the open filter, but getting up there. After pulling in to my garage and leaving the engine running briefly, all the swirling air kicked up once the fan turned on would also guarantee that both the IAT's would climb even higher. Fortunately, extended idle time in an enclosed space won't be common.

Overall, with the Eaton supercharger on top, this is essentially the nature of the beast with those temperature ranges. I could always upgrade to a cooler running blower, but there is no need to since I don't race, and especially since the Aluminator is running so well. Also, if I happen to need easy access to the spark plugs (or anything in that area), the original intake tube is retained and can be popped right off - no need to fuss with some giant plastic contraption that is sprawled across that side of the engine. So far, I think this intake will do just fine.

Note: If you think an open air kit looks cool just because the inlet is painted to match your car, you'll do nothing but draw hot air in to your engine. Along with my original intake, there are other versions made by companies such as Steeda and C&L Performance with at least some sort of shielding that are probably adequate. An article by Kenne Bell on Hot Air Warning sums up the perils of open filters nicely. Additionally, they also make a simple Cobra CAI of their own with a monster 12" filter - a perfect example of form following function.


Oil separator

The PCV, or Positive Crankcase Ventilation, system is meant to recycle excess combustion gasses, called "blow-by", that slip past the piston rings and in to the crankcase. This is done by placing a positive pressure on the system, by way of the intake air flow, and drawing the gasses back in to the engine where they can be burned again. Along with the blow-by, there are also oil vapors circulating around in the crankcase from the whipping action of the crank and pistons. Back in the day, the PCV system did not exist, but when emissions regulations began popping up in the 1960's, someone decided it was a good idea to cut down on all the additional combustion and noxious gasses. By the way, it's not "PVC" either - that's plumbing material.

In conjunction with the PCV system, an oil separator, or a way to remove excess oil from the intake tract, is essentially a necessity for a forced-induction car. This is even more so the case for the Terminator since it keeps oil from coating the intercooler that sits beneath the supercharger housing. As the intercooler gets loaded with the oil-laden vapor that is drawn through the intake, its effectiveness will definitely diminish, leading to reduced performance (plus, they are just a drag to clean).

Some will choose to use a simple water separator can from an air compressor that you can buy just about anywhere, but I liked something that looked like it was an actual automotive part (although the "cheap" one is probably every bit as functional as the "popular" kits out there). After my new Aluminator was up and running, I decided it was time to remove the small separator I had used for the past several years in favor of a larger one made by a company called Advanced Design Depot, and sold as their "ADD W1" (also see thumbnail). It is actually marketed by an outfit called 360 Infinite USA, but for whatever reason, they don't show it on their web site. This requires a visit to eBay if you want to pick one up, but they are found easily by searching for it by the part number. If you are in to a little bling, there are also several more colors available for whatever suits your tastes.

Not only is this tank a quality piece, but it's overall just a better design than what I had used before. As a nice touch, it even has a small dipstick along with a filter element that is removable for cleaning (shown above). Does it work? Absolutely. With just about 100 miles on it, there is a noticeable amount of oil in the tank already - probably more than the other one would accumulate over the course of 1,000 miles! Definitely a great score, and one that will go a long way to keeping the intercooler clean.

A decent close-up is below where you can see how it is mounted using a flat corner bracket tweaked and bolted to the radiator support. It is also evident the simple way it fits in the factory PCV line, between the PCV valve and intake, using lengths of 3/8" ID fuel line. Doing it right also means mounting it farther away from the PCV valve than on the firewall: this gives the oil vapor the ability to cool, condense, and drop in to the tank. It works great, looks perfect under the hood, and it's compact size makes it easy to mount in the tight confines of the Terminators engine bay. Another great score.


Note: In the diagram up above, notice that metered air flows past the Mass Air Flow sensor before it is drawn in to the engine. It is closed, and calibrated, yet some people feel the need to remove all the PCV gear in favor of breather caps for "better performance", or whatever they call it (a "pre-filter" is even more useless). Yes, you can have the tune altered to allow for an open system, but really, what is the point? The topic has probably been beaten to death, so I'll be happy to avoid it. It doesn't bother me to have the PCV gear there, nor do I see any advantage to yanking it all, other than for aesthetics. Not only have I never had any problems, it's just as well that the unburned gasses are recycled - less crud we all have to breathe.


Oil pump

An important area to consider when building, re-building, or just being proactive with your upgraded engine is the oil pump. From the factory, the pump on the Terminator actually isn't all that bad, but it does have one Achilles' heel: its drive gears. Under high-RPM use, the factory powdered-metal gears have been known to shatter, which is definitely not good for your engine, especially if you are on a track (then again, it's bad no matter where you might be).

The modular engine Generated-Rotor, or "Gerotor" pumps are actually installed on the front of the block, rather than sitting in the oil pan, and are driven by the crankshaft snout. As the crank turns, the internal gears of the pump are rotated around the snout causing a suction which in turn draws the oil up through the pump body and in to the engine block. With the propensity for the gears to be a weak link, there is however a perfect solution: upgraded billet steel gear sets.

On my end, I purchased new "Shark tooth" gears from a company called Boundary Engineering, which turned out to be a great value at just over $200, to install in a new Ford Racing pump. There are also versions made by MMR and the Triangle Speed Shop that are a bit more expensive, but have been given positive reviews and are still decent choices. I went ahead and spent the money with Boundary after chatting with the shops owner, Travis, and feeling good about soliciting a small business run by enthusiasts. Here's a comment from Travis on a forum when he was asked about his products:

 "...I manufacture and design the gears myself. These are made in America, made by me actually. There aren't many that actually know how to design a trochoidal gerotor pump, but I'm one of them. I didn't hit the copy key, these use a unique pattern that mitigates the torsion moments on the teeth and creates a bigger pumping chamber. We have thousands of my designed gears floating in different vehicles, and many house name my brand. I challenge you to find one that has failed."

...I manufacture and design the gears myself. These are made in America, made by me actually. There aren't many that actually know how to design a trochoidal gerotor pump, but I'm one of them. I didn't hit the copy key, these use a unique pattern that mitigates the torsion moments on the teeth and creates a bigger pumping chamber. We have thousands of my designed gears floating in different vehicles, and many house name my brand. I challenge you to find one that has failed.

Read more at:
...I manufacture and design the gears myself. These are made in America, made by me actually. There aren't many that actually know how to design a trochoidal gerotor pump, but I'm one of them. I didn't hit the copy key, these use a unique pattern that mitigates the torsion moments on the teeth and creates a bigger pumping chamber. We have thousands of my designed gears floating in different vehicles, and many house name my brand. I challenge you to find one that has failed.

Read more at:

It turned out perfectly, especially since the gears really are a work of art (only car guys would say that, but compare them to the original set and draw your own conclusions). With all that in mind, my new pump has been rebuilt, and installed in my new Aluminator. The images below actually show another pump - minus the backing plate - with the OEM components on the left, and with the new gears installed on the right (for some reason, I neglected to get a picture of the FR pump I ended up using). If you aren't sure if a gear swap is up your alley, check out how simple it is in a YouTube video courtesy of Jon Pavia at UPR - more good press for Travis as well!

Note: It should be apparent to anyone working on these engines how critical oil pressure is - hence the necessity of using better pump gears. As for monitoring it, the stock gauge stinks and is essentially just an on/off indicator (I believe it activates with just around 5PSI). Fortunately, it is easy to add a functional oil pressure sensor to read on the Interceptor, or an aftermarket gauge if you choose. I made sure to pick up the AeroForce kit, with all the details shown on my Electrical page.

Overall, the Gerotor pumps are incredibly simple, yet perfectly functional. The main moving part is the gear set, working in conjunction with a pressure relief valve adjacent to it that recycles oil back around the gears as necessary. Based on the model of engine and its specific pump, the only real variable internally is the relief valve: the stiffer the spring, the higher the pressure that must be reached in order for the plunger to be forced down. Once the plunger is compressed, excess oil flowing up and around the top of the rotors will be bled back for another pass.

While the stock Terminator pump is a good choice for just about every performance DOHC engine out there, there are some other options available as well. Oil pump giant Melling also sells upgraded pumps that already contain their billet gears, but it's also just as easy to buy the gears and transplant them in to a pump of your own (you can also buy the pumps from the aforementioned gear vendors). Another idea is the use of the latest "3V" pump, which is a high-volume and high-pressure version (with a 75PSI relief spring compared to 60PSI in the HO pump).

Interestingly enough, the newest 3V pump is also now used on the 5.4 and 5.8L Shelby engines, and had been adapted for use in the already-discontinued Ford Racing Aluminator M-6009-A46X 5.0L stroker short block. The 3V pump is a viable upgrade for the 4V engines as well, especially since the A46X block is also perfectly suited for 4V heads (the 3V pump operates at a higher pressure due to the Variable Valve Timing gears). The pump is also available as the FRPP M-6600-F46, Melling M360, or through Ford under DR3Z-6600-A: my choice for the new engine. If you look closely, you'll also see "3V" embossed on them compared to the "HO" on the Terminator pump.

With the internal upgrades in mind, one last important part of the pump to bring up is the back cover, which I why I chose the newest Ford pump. The earlier factory pumps (9L3Z-6600-A) all have an aluminum backing plate that will flex at high RPM's. This is something to consider, especially since the flex permits some oil to leak around the back, potentially leading to a drop in oil pressure. To combat this, the Melling M360 uses an iron backing plate, whereas the latest Ford and FRPP pumps have a steel backing plate - both definitely stiffer than aluminum (see the chart below for component weights). If you really want to get serious, while mixing in a little bit of tinkering, snag the Shelby pump and add some new gears to make it essentially bullet-proof, or just buy it complete from Boundary. With as much money that can go in to these engines, the last place one would want to skimp is something as basic as the oil pump.

Component Weight, pounds Weight, grams
Gear set, standard 1.11 (1Lb, 1.8 Oz.) 504
Gear set, billet 1.24 (1Lb, 3.8 Oz.) 563
Backing plate, aluminum 0.32 (5.1 Oz.) 145
Backing plate, steel 1.29 (1Lb, 4.7 Oz.) 586

Note: The factory oil pump in the Terminator and all '96-'04 DOHC Mustangs is considered a "high-output" version. It delivers approximately 10% more volume that the previous SOHC pumps and has a pick-up tube opening of 15/16" compared to 13/16" on the non-HO pumps. Along with the availability through Ford as F8OZ-6600-AA, the pump - including a new pick-up tube - can also be purchased through Ford Racing as M-6600-D46 (yes, the Ford Racing pump is the same). Otherwise, the pump by itself is also available through Melling as their M-227.


Oil pan

The oil pan on the Terminator is a pretty decent one for most conditions, so it's worth addressing. It is actually a common pan for the '96-'04 4.6L V-8, with this version used beginning in 1997 (the '96 pan had a unique part number due to inclusion of a level sensor). Amazingly enough, it is still sold through Ford as XR3Z-6675-DA and also carried the FRPP part number of M-6675-D46 for a brief time. Additionally, an OEM replacement is made by Spectra under their part number FP46A, so new pans are definitely easy to acquire if necessary.

Along with the option to stay with the factory pan, an upgrade to a "Deep sump" pan that holds a higher volume of oil is popular, especially if any performance driving is involved. The bigger pans are available through Canton, Moroso, and MMR, just to name a few, and will generally hold 8 to 9 quarts (they all advertise them with a seven quart capacity, however). These pans are also particularly important when upgrading to a higher pressure oil pump, since the increase in volume will ensure adequate lubrication.

Note: The SVT Supplement (see my SVT Documents page) states that the oil capacity of the Terminator is 6 quarts, but original fill was actually 6.5 to 6.8 quarts. Even with the aftermarket pans out there advertising their extra capacity, plenty of Terminator owners regularly use additional oil without issue. Not bad for a pan with no extra kick-out!

For my new Aluminator, I splurged and picked up the Canton 15-784 "Road race" pan. Not only is Canton one of the bigger names in this area, this exact pan was also used on the 2000 Cobra R and was factory installed  - very cool. It is also advertised as a 7 quart pan, but per the '00R Supplement, the general capacity is 8.5 quarts (probably due to the external oil cooler). Like the Terminator pan, its factory fill was higher - this time over 9 quarts - so there is no doubt these pans are going to hold more oil if necessary. I experimented and filled mine with 8 quarts of water before mounting it, and that level just barely reached the baffle and front of the pan, so even with nine quarts, the level won't be too extreme.

As a bonus, it uses the factory pick-up tube and contains a sump with four trap doors. The doors open inward to allow oil to flow towards the pick-up, and will keep the oil from flowing away from the pickup during hard cornering and acceleration - definitely beneficial! Also, the slosh baffle on top is removable, but I'd imagine there aren't many case where it would need to come off. Overall, it's just a real nice pan with some fine craftsmanship behind it! 

Back to the factory pan. It has a slightly extended sump for the pick-up, a fixed slosh baffle, and also features built-in "scrapers" at the front of the pan. Because of the scrapers, the Terminator also had a "windage tray" (meant to limit the foaming of oil from the cranks rotation) that only covered the rear of the crankshaft, directly above the sump. In the image below, the scrapers are visible to the left with the sump and baffle shown on the right side.

Along the lines of the windage tray, the Terminator pan can be used with full-length versions, but if that is the case, those scrapers either need to be cut off or "massaged" downward to allow for the necessary clearance. This would be the case if one acquires the 3V Mustang tray, Ford part number 4R3Z-6687-BA (standard with the Aluminator block), or if using something like the Canton tray, which was also original equipment on the 2000R. With the Canton pan, it isn't an issue since the scrapers are not present - yet another nice feature.

If you are content on staying with the Ford pan, it's not a bad way to go, especially if you are comfortable exploring the upper limits of its capacity. Still, if there are big dollars going in to a new, or rebuilt engine, you can't go wrong by adding to the oil quantity with a larger pan. After all, oil is the life blood of your engine.      

Note: Although the OEM oil pan is still available through Ford after all these years, the "high-flow" pick-up tube is obsolete. The FRPP oil pump listed in the above section is even a better deal now, since somehow the tube is still part of that kit which is very reasonably priced. Don't panic if you need one separately though, as Melling does sell their version of it under part number 335S - it's just not as good of a deal!


Oil filter

This is a late player to the game, but something I actually intended to purchase when the new Aluminator was finished (yes, I've mentioned the engine a few times already). While there are some good filters out there such as the trusty FL-820S, some guys will prefer more of a "performance" version from places like K&N, Bosch, Wix, and Mobil1, just to name a handful. I have been partial to the Bosch 3410 up until now, but for the first fill of oil in the fresh engine, I picked up the Motorcraft filter just to run it with at idle for a few hours.

Nonetheless, my intention was still to splurge and upgrade to a high-flow, high-filtration filter that was not only indestructible, but even better - washable and reusable. Now, I'll be stepping up to a billet aluminum version, the PurePower PP8433. All of its finer points are illustrated below, along with a nice view of the components (made in the USA as well). Not only do they look great, but they also have a higher flow rate and a burst strength that conventional filters won't come close to matching, as indicated in the specs. Even better, you can cut down on the amount of used filters that end up in landfills, so it is a win all around. If you are serious about your engine, you just won't go wrong here.

Note: This billet filter may also look familiar for anyone that had perused the K&N website. It is also listed there under the part number SS-2010, which is made by PurePower for K&N. There don't seem to be many of the K&N versions out on the market, but I'm sure with enough searching, deals can be found (I grabbed my PP8843 from Amazon for less than retail, which made it a nice score). Although there is a lot of information on the PurePower site about these, don't hesitate to check the K&N listing, especially if you want more details on what it takes to clean them. If that doesn't do the trick, there is even a YouTube video, courtesy of K&N that will clear it right up.

While on the subject of oil filters, there is no sense in skipping over my $0.02 on the oil itself. I've been partial to Mobil1 (no, it's not "Mobile 1") in my vehicles for over two decades, and it has never let me down. How can I say that? Well, easy: I frequently send samples in to Blackstone Labs for analysis, and they have yet to show me that the oil isn't holding up or doing exactly what it needs to do. I always get a kick out of the forum crowds that will tell you which oil is "best", or why they'll abandon one brand since it wasn't "meeting expectations" or some other nonsense like that. With everything, opinions will vary, but since I have yet to see that what I have been using for so long isn't cutting it, I'll stay with the known quantity.

Expanding further on that, my preference in the Cobra since I purchased it had been the M1 High-Mileage 5W-30. It is actually one of their better oils, containing higher levels of the anti-wear additives Zinc and Phosphorus (Zn and Ph), commonly referred to as "ZDDP". As a 30-weight oil, it is perfectly suited for a performance engine, and under hard use, it isn't going to "shear" down as fast as a 20-weight oil. Despite what some may say about the need for the anti-wear additives being diminished with newer roller cam engines, I believe them to be quite beneficial all the time, especially when an engine is new or driven hard. For more info on all the M1 oils, their Product Guide has some good information.

Taking a slight step back, with about four hours of idle run time on the new engine, I not only upgraded the filter (the before and after shown above), but I sent a sample of the "break-in" oil to Blackstone. Although I've mentioned Mobil1, I actually used a non-synthetic oil for the first fill, and will use it for a few hundred miles until I switch back to the M1. While there are specifically labeled "break-in" oils on the market, I went with the trusty Shell Rotella 15W-40 diesel oil. Yes, it's labeled as a diesel oil, but that is because it has a higher ZDDP count beneficial to hard-driven diesel engines. Even with just an easy four hours on the engine, the Blackstone Used Oil Analysis, or "UOA", showed that the Shell oil is some pretty decent stuff.

Even with Shell showing good numbers (I'll also get another sample after driving with it), I'll still be going back to an M1 synthetic oil for full-time operation. My new oil of choice, with similar ZDDP values as the High-Mileage oil, will be the European Car Formula 0W-40. No, it's not a "zero-weight" oil, it is still a 40-weight, as indicated by the suffix. The prefix simply tells you the cold-flow "pumpability" of the oil: the lower the number, the easier it will flow when cold - perfect for start-up. The "0W" does not indicate that the oil is a zero-weight in the winter! In this case (and in all), that wouldn't make sense. You couldn't have an oil that would be a "0W" when cold and a "40" when hot since that would imply it would be thicker as it heated up. Clear as used oil! 

Note: The DOHC engines have been using 5W-30 oil since they first hit the streets. Sometime in the early 2000's, thanks to the government's all-wise Corporate Average Fuel Economy (CAFE) standards, Ford made the switch to the lighter oil to show improvements in mileage spread out among all models. In simplest terms, the thinner oil will produce less drag on the engine, theoretically improving the MPG's (the thinner oil, however, is less "durable"). It's a ridiculously small number, but when it's factored in across a lot of engines in a lot of cars, driving a lot of miles, apparently it means something. As an example, a Motorcraft 5W-20 product description even promises a "significant improvement in fuel economy" over the previous 30-weight oils. If it's in print, and on the internet, it must be true.



I'm not actually a fan of "bling", especially under the hood, but I did enjoy adding a few items that look great without deviating much from the factory presentation. Although some items like the "C/C" plates, oil separator, and intake happen to fit right in, those were purely a matter of function over form which turned out well anyway. Still, I had to add a little more of the personal touch.

From Ford Racing, I couldn't pass up on the very cool "Powered by Ford" coil covers that were once sold as M-6067-GT. These were actually sourced from the 5.4L Ford GT engine, but they fit perfectly on the 4.6L modular engine as well. Unfortunately, they are discontinued from Ford Racing, but as of early 2015, I have been told there are approximately 130 sets still in the Ford parts system. With that in mind, it appears that you are now required to provide a VIN from an actual GT to purchase them, but I don't know if there is any more verification beyond that.

In any case, their part numbers are 4G7Z-6P067-AA and 4G7Z-6P067-BA. I also added the proper stainless-steel button-head Torx bolts that are another nice touch: available through Ford as W701621-S437. It's just too bad that only one side is really visible when on the Terminator since they do look amazing.

Note: These GT covers frequently show up on the used market, which technically makes them still available to the average person. One down side is that they can be beat up after many years of use (powder coating them is always an option) which also may mean that the gasket is dried up. Fortunately, the gasket for these and all DOHC covers is the same, and universal to both sides. If you happen to need them, the Ford part number is F7LZ-6P069-AA, and they are about $20 each.

On the small side, my replacement oil cap is also different, which can be seen above. Note that it has "Engine Oil" on it (which matches the dip-stick) rather than the factory "SAE 5W20". If you are overly picky about something like this and would like to replace your OEM cap - especially if you have ceased using a 5W-20 oil - it's easy enough to get this one through Ford or any of their vendors. The Motorcraft part number is EC-743

Also on the small side, something that was a real recent addition which fits right on top of the supercharger: a decorative cover plate. It is something new from the SVT Store, and looks perfect on the Eaton housing. Even better, it is very inexpensive, and if you happen to like it, there is a great excuse to head on over to the site and stock up on other Cobra and SVT collectibles. Thanks to the stores proprietor, Marcie, for letting me add the prototype to my Cobra - it really is nice looking!

Another nice touch, especially with the installation of my new Aluminator engine shown in the above pictures, was a Powered By Ford emblem on the passenger side cam cover (this engine was built by me, but I did save the original badge). This was easy to find via an internet search, and even better, the size is almost a perfect match to the original Niche Line plate. I thought it was a great companion to the COP covers, and will also give a slight hint to something different under the hood. It may not be totally evident from the pictures, but while my build was in progress, I also had the timing cover and cam covers powder coated in silver for a fresh look.

Note: To the best of my knowledge, the original color on the Terminator cam colors is Argent Silver. I don't know the exact process that Ford specified in the coating process, but the paint has been known to be extremely durable. If you have a set that may need to be re-coated in the "original" color, it is still possible to find the paint out there. As long as you don't mind it being listed as a wheel paint, it should be a pretty decent match!

My last unique item, again from FRPP, is the Cobra pulley cover. The one I happened to snag is interesting since it is bare steel with a brushed finish, whereas the norm for them through Ford Racing was, I believe, a chrome finish. They used to be available as M-2301-J, and even though the stock photo could almost pass as a bare version, all the other ones I have seen were definitely chrome. I couldn't be sure if there was an update at some point, but mine definitely looks great, especially since I still can use it on the snout of the Eaton supercharger. It's also worth pointing out that it contains the strut that actually attaches to the front of the blower, whereas the chrome one apparently left that out and was only attached with the two lower bolts.

This cover was a nice upgrade since the stock piece, with its horizontal grooves, tends to shed the factory paint and then rust - definitely not a good look for a car that is in mint condition. It's easy enough to re-paint or even powder coat them to a color of your liking, but I didn't want to pass up the opportunity to score a somewhat rare item. Some people just choose to remove these covers altogether, especially since they don't work with aftermarket superchargers, but I still wanted to retain a pseudo-OEM look and this did the trick. If I was really adventurous, I could even paint this one to match the supercharger housing (here is the custom formula again), but the brushed look is definitely one you don't see very often. Then again, I like to be just a little different. 

Note: For some more trivia, the un-painted pulley covers apparently existed very early in the program on the Pre-Production cars (also shown on my Background page). Where that changed is anybody's guess, but it is most likely one of those minute items that will never be figured out. If someone out there knows, it would be neat to find out the story there.