HOW TO ADD 90 HP? 5.0L FORD INTAKE UPGRADE

hey guys Richard holder here welcome to the channel where are my five ler Ford guys who wants to add a 100 horsepower from a simple intake swap wait a minute Richard is that even possible in this video I'm going to show you how we got almost 100 extra horsepower from a simple intake upgrade on a modified 5 L now the gains that you get from an intake manifold upgrade are dependent on two things first of all it depends on which intake manifolds you're actually comparing but the most important thing is the motor that you're comparing them on what do I mean by that let's take a look the power gain is offered by an intake manifold upgrade are dependent on a couple of different things first of all obviously the intake manifold that you're starting with and then the intake manifold you're using for the upgrade but it's also determined by the test motor you see the more powerful the test motor that you're running the test on the greater the gains of the intake manifold and that's what we're going to illustrate here we're going to start off with a fairly mild combination this was actually a 306 in motor it was rebuilt basically a 5 L that was rebuilt it had Forge Pistons with valve reliefs it had a stock cast crank and stock rods in it it also was equipped with a set of e7te iron heads the factory heads which did have a valve spring upgrade on them this particular motor also had the stock 5 L ho upper and lower manifold and the stock throttle body it was run with long tube Hooker Headers we had 36lb injectors on it and back in the day we ran this with I think it was a fast xfi management system dialed in the air fuel and timing with each one of the combinations and what we were going to do was start off with the factory ho intake manifold and then upgrade it with a very common GT40 tubular upper and lower manifold and that's a very common upgrade and it works very well but because this thing had the stock h show intake manifold but more importantly for the test had stock heads and stock cam shaft it was basically the stock displacement a little bit bigger because it was a 306 but it was a stockish type motor without having a good cam shaft and and and a good set of matching cylinder heads to go with it the intake manifold upgrade is worth basically the least amount of power of the three combinations we're going to demonstrate so run in this configuration with a stock ho upper and lower intake manifold our basically stock motor with headers on as a a rebuilt 5 L produced 261 horsepower and 321 foot- pounds of torque with the stock ho upper and lower intake manifold and here's what happened when we upgraded that with the GT40 intake all we did was remove the upper and lower put the GT40 on it was run with a 65 mm throttle body and in this case the peak power output jumped to 20 79 horsepower and Peak torque was up slightly to 323 footb so the intake manifold upgrade netted us an additional 18 horsepower measured Peak to Peak the difference was more out past 5500 but measured Peak to Peak 18 horsepower Peak torque only Changed by two foot-pounds and as you can see with the GT40 it shifted it out just a little bit compared to the factory ho manifold but as I said because this thing was basically a stock rebuilt motor it was 30 over 40 over but it had the stock heads it had the stock cam shaft there wasn't much motor there to take advantage of the additional air flow offered by the GT40 but still it showed a little bit of an upgrade 18 horsepower let's find out what happens when we do an upgrade on something that's a little bit Wilder and more powerful to begin with our next intake manifold test was actually run on the same combination the same test motor but it had been augmented from our previous test so we still had the same short block the same 306 uh 30 or 40 over with the forge pistons in it and but this time it was equipped with a set of good heads and a decent cam chea so for the cam chef we installed the same Cam that I normally install in all of these things it's the uh comp extreme energy 274 and I'll go ahead and put the specs up here but you can see uh it's not a huge cam it works very well very streetable works with all kinds of stuff you know works good NA works good with a blower turbo nitrous whatever you're going to put it on so it's a good cam shaft it's a good performance cam shaft for a motor of the size it drives around nice I had it in my car I had the crane version in my car for year uh years and years and years and it always worked out great but it had that cam shaft and then we we combined that with a set of rhs aluminum ported heads so it had enough cylinder head and enough cam shaft and what we did was we first ran this thing with that GT40 intake manifold that we did on the test previously so run with the additional cylinder heads and cam shaft R 306 now produced 354 horsepower and 378 ft-lbs of torque so it was doing very well but we know that it needed uh a better intake manifold so what we did was install a an extrude hone ported Holly systemax intake we had taken the Holly systemax intake from the guys over Holly and then we sent it out to the guys at extrude hone and they did their extrude H hone porting process which basically is uh if you can think about it as silly putty and preg ated with silicon carbide and then it's forced back and forth through the passages with big hydraulic Rams and while it's doing that because it flows a lot like air does it's removing restrictions in the air flow because of the abrasiveness in that silly putty it's kind of a cool process and it works real really well on these long Runner manifolds that don't like provide access for the typical kind of porting tools um this stuff works well we've used it a lot on these 5 lers we use it a lot on the 5 lit ho Factory manifolds and a lot of these long runners like the holly systemax or the Seline or any of those manifolds but we upgraded this with that ported version of that intake manifold and since we already had heads and cam on this thing it actually worked out fairly well we got some pretty decent gains on this thing here was our ported systemax manifold and the peak power jumped up to 395 horsepower Peak torque checked in at 380 foot PBS of torque so on this combination our intake manifold on modified 5 L combination our intake upgrade netted us an additional 41 horsepower measured Peak to Peak um and again not a big change in Peak torque only two foot pounds although you can see like with the GT40 this shifted Peak power out farther we made Peak torque at about 5,000 RPM whereas on the GT40 we made it all the way back here at 4300 RPM so a dramatic change in the torque curve and you can see compared to the GT40 this orded version of the systemax actually lost power all the way up to 4700 RPM so you'd have to decide is the big change out at the top worth the loss and low speed torque down low but we saw some good gains I mean out here at uh 6100 RPM we had 394 horsepower versus 342 so we had over 50 horsepower out there at the top but it goes to show you what an intake manifold can be worth an upgrade can be worth on the right combination so let's take a look at one final test where we got even bigger C power gains from the intake upgrade our final test was run on another 5 L and this was like the previous version We this was a modified motor we had a 305 or a 306 it was 30 over it had a set of forg Flatt top pistons with valve reliefs it was a different motor but it also had a set of Holly systemax heads they were not ported they were as cast we had the the same comp extreme energy 274 cam shaft in it and unlike the previous test this was run with the factory ho upper and lower intake manifold and long tube headers and the cam shaft and the heads and then we installed a a an edel Brock performer rpm2 intake manifold both the factory ho and the rpm2 were both run with a 75 mm throttle body and you might be thinking hey Richard how did you run a 75mm throttle body on the factory ho Mana when the opening is nowhere near that big lucky for us we had a tapered EGR spacer from the guys over at acab and that worked out just fine in reality having the 75mm throttle body on the factory ho intake manifold was of little benefit because the throttle body is not what's holding back the airf flow of that manifold the opening in the manifold and the long Runners and the lack of flow and all that stuff basically hold back that particular manifold but here is the comparison so we ran that combination first with the ho upper and low lower intake manifold and we made 319 horsepower and 356 foot- PBS of torque so here's what happened after we installed the performer RPM two upper and lower intake manifold from the guys over at edel Brock we got some serious power gains the peak power was all the way up to 385 horsepower and Peak torque was up to 3 68 ftlb so with this particular combination going from the factory ho manifold up to the rpm2 that netted us an additional 66 horsepower measured Peak to Peak and an additional 13 foot PBS of torque so unlike the other two where we only gained one or two foot- pounds in the peak torque we picked up a fair bit of peak torque and then we the rpm2 you know shorter Runner flows more does lots of good things it made more power from about 4,000 RPM on on up which is kind of where you would be if you were going through the gears it's important to note though just like a lot lot of the other tests that we showed with the GT40 manifold it lost power um the GT40 manifold made more power than the rpm2 below 4,000 RPM so again you know there there's almost always some kind of trade-off but this goes to show you that depending on the combination that you're that you choose to test this on and depending on which manifold you compare it to the gains that you get from any kind of upgrade uh on the intake side of your 5 lit Mustang are going to depend let's get to our conclusion okay guys what do we learned from this little experiment testing intake manifolds on three different 5 L Ford combinations what we learn the following thing the intake manifolds that you choose to test are very important but so is the test combination on our modified version we were able to improve the power output by almost 100 horsepower and here's why our combination already had cylinder heads and Cam cheaf that wanted to make Peak power at a certain RPM when we add the intake manifold that also wants to make Peak power at that same RPM we have a good combination unfortunately the factory 5 L ho upper and lower manifold with its very long Runners and very restriced ports does not want to make power out there the power fell off dramatically out at the higher engine speeds whereas the other combination the modified combination with the rpm2 was kind of really happy there so we saw a big difference and power of almost 100 horsepower Armature holder make sure to like share subscribe ring the bell do all that stuff more and more testing coming up

Channel: Richard Holdener

Views: 133,629

Keywords: 5.0L FORD, 302, HO, EDELBROCK, HOLLEY, GT-40, FORD

Id: pVe2DI_gOis

Length: 11min 38sec (698 seconds)

Published: Tue May 11 2021