FORD RACING SUPERCHARGED 4.6L 2V TEST

[Music] ford's holds a ton of 4.6 liter two valve modular ford motors i'm going to show you guys how to make more power in this video i got a cool series of upgrades for the 4.6 liter two valve pi motor we're gonna install shorty headers then long tube headers then boost from a forward racing supercharger then a bigger throttle body then a pulling to increase the boost then camshafts let's check it out now this was a really cool series of tests i like running these kinds of tests where we can go step by step and add one part at a time and show what the differences are this is on a 4.6 liter two valve and so obviously we needed a test motor and rather than get one from the wrecking yard like i normally do this one actually came from the guys at sean highland and belonged to the guys at westec so this was a 4.6 liter two valve pi motor and it was basically stock the only thing it had on it was forged pistons unfortunately they lowered the static compression ratio down below nine to one so it was eight point eight or eight point nine depending on how how you calculated but it was less than stock compression which means it's going to start out making a little bit less power but we were going to run boost and nitrous and all kinds of things on this so we weren't really that concerned with it we liked the fact that it had a forged piston in it because that's we didn't obviously didn't want to break that so it had stock uh non-ported just you know basically as cast 4.6 liter two valve pi heads that had stock cams in it you know everything was basically stock and this came as a long block without the intake manifold we already had a pi intake and everything so what i want to do is start out with this basic motor and run it in stock trim and then show some minor modifications and then we're going to get into boost as well so we'll start out with our stock trim motor what we did was put stock cast the stock exhaust manifolds on it and two and a half inch exhaust we put the stock pi intake manifold and the stock throttle body on it we ran it with a fast xfi management system and obviously we dialed in the air fuel and timing to get this thing right i think we had 36 pound injectors in this thing at the time run in stock trim with the stock exhaust manifolds our 4.6 liter 2 valve produced 288 horsepower and 334 foot-pounds of torque so our first modification was actually to try a set of shorty headers at ford racing cell so we installed the shorty headers in place of the factory exhaust manifolds so that's going to be and as you can see there was almost no change in power from the shorty headers and that's not really surprising given the fact that this motor wasn't making very much power so it didn't have a lot of exhaust flow so the exhaust manifolds were not very restrictive the shorty headers obviously were less weight than a set of cast iron manifolds but they just didn't offer any flow gains really because you know we weren't making enough power but that changed when we installed a set of long tube headers from cooks so here are the long tube headers from cooks and as you can see the long tube headers picked up power everywhere and this is normally what we see with a good set of long tube headers because the long tube headers add scavenging even down at the bottom at the top this it really isn't a flow thing like the difference between the shorty headers and the long tube headers this is more of a scavenging effect kind of a super charging effect in the same way that runner length does but it does this in reverse so long tube headers pick up power basically everywhere in the curve as you can see here and the gains were let's see 305 to 3 18. so 13 foot pounds down there and 10 or 12 horsepower so it was a good gain from the headers and probably we could pick up even more if we did this header test after we had installed cams and things like that but just know right off the bat long tube headers on a 462 valve are a good idea so now let's take a look and see what happened after we started adding boost to the equation after running the exhaust modifications on our 4.6 liter two valve it was time to step up to some boost and normally we would run a turbo or a twin screw or centrifugal blower but what we did for this one was ford racing at the time had a dedicated blower kit for the 4.6 liter two valve and since we wanted to try some ford racing stuff we installed the supercharger kit now the supercharger centered around an m90 eaton supercharger and this was a non-intercooled version and the blower um sat below the intake manifold basically in the valley of the 4.6 liter and then the intake runners came up above that so it did have some intake runner-like which was good but it was non-intercooled so obviously ultimately that's going to kind of limit the power production but since we were running an m90 with that kit anyway the blower kind of ultimately would limit peak power as well so what we did was put this supercharger kit on our 4.6 liter two valve from sean highland and we ran it with the factory factory two valve throttle body and we ran with the as delivered pulley supplied with the kit here's what happened when we put our supercharger on run with the supercharger the power output jumped to 383 horsepower the supercharger provided a peak boost of 6.8 psi but actually and especially at the top the boost level kind of leveled off to four and a half to five pounds it wasn't making a lot of boost which is good as i said it was a non-intercooled version and it was an m90 supercharger so there's only so much the supercharger could do but what we did after that was to install a new throttle body we figured that the stock throttle body might be restrictive and since the air into the blower is going to help determine the power output and the boost supplied by the blower that comes out we want to install a bigger throttle body so we put a 75 millimeter throttle body on here here's our throttle body upgrade as you can see it did pick up power and the boost went up slightly as well which is kind of what we would see when we increase the airflow into the blower we also increase the airflow out of the blower so the boost went up the power went up with the throttle body upgrade the peak power jumped from 383 horsepower up to 394 horsepower peak torque was up to 402 foot pounds so now we officially crossed the 400 foot pound mark so it was doing well but now let's take a look and see what happened when we made some other changes to our supercharger after the installation of our larger throttle body on the ford racing supercharger we decided to do what everybody else does and obviously that's turn up the boost so we replaced the factory there were the supplied 3.6 inch blower pulley with a 3.4 inch blower blade spinning the blower faster relative to the engine speed means you're producing more air putting more air into the motor more boost more air more power pretty simple deal so what we did was replace the pulley on it run this thing again here's what happened when we increased the blower speed and increased the boost we did see a gain in power the peak power jumped up to horsepower as you can see torque was up quite a bit as well too up to 417 foot-pounds the problem is while the peak boost rose from 6.8 to about 8.8 pounds it still fell off at the top because that little m90 superchargers were just having trouble supplying enough airflow to our combination it's not really size for this in actuality this blower kit from ford racing was designed to basically add 100 horsepower to an otherwise stock 4.6 liter pi motor and it did that very well but it's not designed to do the kind of things that we're doing so as you try to go up and up in power you start getting diminishing returns because you're fighting the supercharger itself what you really need to do now is you need to pay a little bit more attention to the inlet side of the blower maybe port the blower port the discharge side you know really kind of get into it if you're trying to get all that you can out of that particular supercharger size the ideal thing obviously is just to put a different blower on it put a kenny belt twin screw or a tvs or something else on with an intercooler and yeah then you can really kind of get after it but we did not stop here after putting the change in pulley on there we decided what this thing needed was to replace the stock cams supplied with that sean highland short block so what we did was it replaced the cam shaft with a set of comp uh extreme energy 262 cams and we also made sure that when we installed the cams that we optimize the cam timing and by that i mean a lot of times when you put these two valve cams on the cam timing will be off right to left so we made sure to dial the cams in so that the cams were the same on each side because you'd be surprised i did a lot of stories on this back in the day where we checked the cam timing from the factory motors and they could be off by eight or nine degrees from one side to the other so obviously that's not ideal when the two sides of the cell of the v8 are making different power because of the different cam timing but here's what happened when we put the extreme energy 262 cams on it the power jumped up quite a bit the boost dropped which is exactly what we would expect when you increase the power output and the efficiency of the motor the boost actually comes down because the supercharger is trying to supply the same amount of air we're using more of it the boost comes down it's all a big natural thing so what happened was we pushed the power up to 436 horsepower and the peak torque checked in at 428 foot pounds of torque so again jumps everywhere and the thing that i liked about this cam swap i like these mild cams on the 4.6 liter two valve the 262 cams work very well and as you'll notice even down here at 2500 rpm we didn't lose any torque compared to the stock cam so all we did was run the same torque there up to about 3 200 rpm and then we just saw power gains everywhere now the only thing holding this combination back now obviously is that little m90 supercharger if this were a turbo or a twin screw or centrifugal or something we would be making a lot more power but i just wanted to show you guys what happens when you make these incremental change on a 4.6 liter two valve let's get to our conclusion okay guys what do you think about the modifications on our 4.6 liter two valve ford motor shorty headers not that much long tube headers definitely yes applying a supercharger always good more boost even better bigger throttle body that usually works pulleys definitely yes and camshafts almost always work but here's the thing you can apply this to lots of different motors not just this one all of those things work on other motors so feel free to apply it i'm richard holder guys thanks for watching make sure to like share subscribe ring the bell do all that stuff i'm trying to get this video in before they make more noise behind me i'll keep testing

Channel: Richard Holdener

Views: 108,107

Rating: 4.9514122 out of 5

Keywords: ford, modular, 4.6L 2V, SUPERCHARGED, BOOST, FORD RACING, CAMS, THROTTLE BODY

Id: cZBKzN9Fgeg

Length: 11min 15sec (675 seconds)

Published: Thu Aug 27 2020