Best 21 GT intake manifold upgrades

[GregO]

Also that's a pretty bold statement saying the 18 is the slowest manifold when Motor Trend compared all of them on the same motor and the 18 came out on top. Take a look at that article

We’ve all been down that road too.
Motor Trend chopped the GT350 throttle early, the Dyno operator did not run it out past 8K RPM’s

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[Proshop]

@Sotty1

This just might work, you’d probably be the first to do it on M6G.
https://www.facebook.com/marketplace/item/751422123092417/?mibextid=dXMIcH

Greg I almost pulled the trigger on this IM when I was switching from my Roush SCer to the ESS so I could have little more power in the rpm range vs my 18. Unfortunately I never pulled the trigger thou cause my money was spread out towards other things.

 

[Jstang23]

We’ve all been down that road too.
Motor Trend chopped the GT350 throttle early, the Dyno operator did not run it out past 8K RPM’s

I know, but since we are talking about applying the manifold to a coyote, what person is going to rev that 8200? None, as the coyote unless its been significantly built internally, can't handle having an 8200 rpm redline. Sure it can rev a couple times here and there to that but it will break the engine eventually.

 

[Dapepper9]

Ok look, not trying to start an argument but the motors are different. That's a fact. The camshafts between the two are also different. The Mustang has long-duration intake cams while the F-150’s are substantially shorter. The earlier the intake closes the greater the cranking pressure, which is necessary to achieve the low-end torque. The F-150 Coyote also has a front-mounted oil cooler, less robust oil pump gears, and no windage tray. The timing cover is less ribbed, and the alternator location is different as well.

Second the dyno test comparing all of them were run to 7500 rpm (8000 with the CJ) with the CJ showing LESS power at the higher rpms.
Also the article is from 2019 (not that old) and tuned by Eddie Rios, if you're calling him a bad tuner then you're a fool. Plenty of fast people run 18 manifolds. In fact several of the top 1/4 times have ported 18 manifolds. Don't go around saying blanket statements like "the 18 is only the best if you refuse to rev past 7200." It's wrong and it confuses people.

1.You’re quoting 11-14 truck cams, 15+ are the same minus firing order. The covers are the same after 13/14 ish (I forget specifically) as if any of the rest has fugg-all to do with the discussion. You’ve also incorrectly quoted the oil pump gears part.
2. The test was done poorly. The tuning sucked and every popular tuner out there can do better and will recommend the 350>18 every time. Lund may be the exception but they prefer cookie cutter over what works. The only fast people with 18manifolds have boost running through them which is an entirely different discussion. If you think an 18 is beating a CJ, ported boss, or a 350 head on over to AllMotorCoyotes page. There’s hundreds of dragy’s, track passes and street runs that say otherwise as well as dozens of dynos showing the 18 suuuuucks up high. It’s great for what Ford intended but this discussion isn’t based on what Ford intended these to do. We’re talking about more. And clearly of the 18 is the right answer, Ford is hella dumb for putting the GT350 into the Bullit and Mach1 and the PP3 package.


now go on, share the VMP dyno tests where they were selling everybody the 18s and holler checkmate LOL

 

[Jstang23]

1.You’re quoting 11-14 truck cams, 15+ are the same minus firing order. The covers are the same after 13/14 ish (I forget specifically) as if any of the rest has fugg-all to do with the discussion. You’ve also incorrectly quoted the oil pump gears part.
2. The test was done poorly. The tuning sucked and every popular tuner out there can do better and will recommend the 350>18 every time. Lund may be the exception but they prefer cookie cutter over what works. The only fast people with 18manifolds have boost running through them which is an entirely different discussion. If you think an 18 is beating a CJ, ported boss, or a 350 head on over to AllMotorCoyotes page. There’s hundreds of dragy’s, track passes and street runs that say otherwise as well as dozens of dynos showing the 18 suuuuucks up high. It’s great for what Ford intended but this discussion isn’t based on what Ford intended these to do. We’re talking about more. And clearly of the 18 is the right answer, Ford is hella dumb for putting the GT350 into the Bullit and Mach1 and the PP3 package.


now go on, share the VMP dyno tests where they were selling everybody the 18s and holler checkmate LOL

Well you’re clearly not going to be convinced otherwise! Explain to me the exact reasons why the motor trend test was done poorly. I disagree about the tuning. Also what stock internals coyote is going to rev past 8k safely repeatedly?!

 

[Dapepper9]

Well you’re clearly not going to be convinced otherwise! Explain to me the exact reasons why the motor trend test was done poorly. I disagree about the tuning. Also what stock internals coyote is going to rev past 8k safely repeatedly?!

That’s because I follow the data and the reality of world watching guys faster than me. What do you want me to point out? Aside from the marketing to sell 18 manifolds? You can disagree about the tuning that’s fine, every popular tuner does better but whatever fugg real world data. And nobody said anything about 8k+. Not sure why you jumped instantly to that. Hell I shift at 7500 and the 18 is the slowest of the bunch. By .2 in the 1/8. And that was with a stock TB and the same tuner for every run. Weird how all the real world data follows this trend

 

[GregO]

Also what stock internals coyote is going to rev past 8k safely repeatedly

I can’t answer that but I’d like to see that answered by a reliable source.

 

[GregO]

There’s one point that always gets glossed over on the 18+ vs. GT350 manifolds;
The manifolds TB aperture.
There’s where the GT350 proves itself when moving towards larger TB’s.
The GT350 manifold in stock form will out ET the 18+ according to a few sources. (Horsepower # be damned)
The 18+ opening is limited when attempting to open up the manifolds TB opening.
The GT350 can be opened up to 95mm or so allowing 100mm TB’s. Hell, KellTrac was one of the first to throw a 95mm ZR1 TB on his NA setup and proved the 18+ manifold opening at the TB is a restriction.

 

[Jstang23]

That’s because I follow the data and the reality of world watching guys faster than me. What do you want me to point out? Aside from the marketing to sell 18 manifolds? You can disagree about the tuning that’s fine, every popular tuner does better but whatever fugg real world data. And nobody said anything about 8k+. Not sure why you jumped instantly to that. Hell I shift at 7500 and the 18 is the slowest of the bunch. By .2 in the 1/8. And that was with a stock TB and the same tuner for every run. Weird how all the real world data follows this trend

You kept saying that the motor trend test was run poorly. What about the test was run poorly? I want to know

 

[Jstang23]

There’s one point that always gets glossed over on the 18+ vs. GT350 manifolds;
The manifolds TB aperture.
There’s where the GT350 proves itself when moving towards larger TB’s.
The GT350 manifold in stock form will out ET the 18+ according to a few sources. (Horsepower # be damned)
The 18+ opening is limited when attempting to open up the manifolds TB opening.
The GT350 can be opened up to 95mm or so allowing 100mm TB’s. Hell, KellTrac was one of the first to throw a 95mm ZR1 TB on his NA setup and proved the 18+ manifold opening at the TB is a restriction.

So, it’s the combination of the larger throttle body and the intake that proves it’s “better” in the top end. One could argue it’s only the throttle body too.

 

[WildHorse]

Boss

all 18+ intake manifolds are better than the BOSS

 

[Dapepper9]

You kept saying that the motor trend test was run poorly. What about the test was run poorly? I want to know

Give me T! T! Give me a U! U! Give me an N! N! ….see where I’m going with this? You can clearly see that Eddie didn’t actually optimize VCT. They optimized to where they make a peak number and no further. However, all 3 (Boss, CJ, 350) will flatline after peak until about 7800-8000 if the tuner actually calibrated VCT. Eddie adjusted until they had their peak figure and just let it go after. Further optimization will carry that peak on the 3 whereas the 18 will continue to fall no matter what you do because it hits a hard airflow cut. In a datalog you can see it in the MAF curve. It runs out of air with any RPM over stock. Ford took GT350 manifold and detuned to have marginally better part throttle characteristics on a man otherwise stock car. Like I said, it’s great for what it was designed for but we’re not discussing what it was designed for. We’re discussing what it’s actually capable of and the answer is not much

 

[Dapepper9]

all 18+ intake manifolds are better than the BOSS

Port em both and run em. Boss is faster every time.

 

[Jstang23]

Give me T! T! Give me a U! U! Give me an N! N! ….see where I’m going with this? You can clearly see that Eddie didn’t actually optimize VCT. They optimized to where they make a peak number and no further. However, all 3 (Boss, CJ, 350) will flatline after peak until about 7800-8000 if the tuner actually calibrated VCT. Eddie adjusted until they had their peak figure and just let it go after. Further optimization will carry that peak on the 3 whereas the 18 will continue to fall no matter what you do because it hits a hard airflow cut. In a datalog you can see it in the MAF curve. It runs out of air with any RPM over stock. Ford took GT350 manifold and detuned to have marginally better part throttle characteristics on a man otherwise stock car. Like I said, it’s great for what it was designed for but we’re not discussing what it was designed for. We’re discussing what it’s actually capable of and the answer is not much

I’m asking this because you can’t provide me any reason as to why that test was run poorly. Because it wasn’t. So please stop saying it’s crap. You’re saying that Eddie’s tuning wasn’t optimized for the gt350. Different from saying the test is crap. If you want I can go find dyno numbers and sheets saying either is better. So shut your mouth man. I’m done arguing with someone saying blanket statements

 

[WildHorse]

Port em both and run em

You, nor I said anything about porting.
And STOCK for STOCK the 18+ makes more hp/tq. Proven time and time again.

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