Best 21 GT intake manifold upgrades

[K4fxd]

t's been mentioned in various places that 17-18 IMRC signals changed from analog to digital like the TB protocol.

I don't know, what I do know is the Min, Max and slope settings are the same for the gen 2 GT, GT350 and the gen 3 Bullitt/Mach 1.

If the Mach 1/Bullitt does have the 4 wire hook up then Ford used a separate under hood wire harness for these cars. This puts to bed what manifold is better. No way the bean counters would spend this money for no gains.

Sponsored

 

[GregO]

what I do know is the Min, Max and slope settings are the same for the gen 2 GT, GT350 and the gen 3 Bullitt/Mach 1.

Just curious, what about the F-150 ?

 

[K4fxd]

The gen 3 F150 is the same as the Gen 3 GT

 

[NicksA10]

Definitely recommend ported gt350 manifold and get with Mike weeden from vmp to tune you, He will have knowledgable answers for any questions you have. I just got my ported gt350 manifold put on along with the JLT CAI a couple weeks ago. Jlt and the steeda open air are both great options. Mike helped me with the whole install on the gt350 since there’s pretty much zero info out there on gt350 to gen 3 swaps, he made a custom imrc harness and shipping it out for free so i can keep my imrc. There’s definitely a difference in power, I now do my 40 rolls in 1st gear being that the power band stays strong to 8k rpm now, in my 3.15 10r80 car.

 

[Darkounet]

That is definitely interesting. Had a gt350 intake/TB laying around and decided to sell the kit due to having no infos anywhere and didnt want to delete my IMRC

 

[91gt331sc]

I reached out to vmp about imrc harnesses for the mach one/ bullitt manifold. I was told they do not offer anything currently. I compared the wiring diagrams for the 21gt, mach one and also a gt350. I think I have it figured out but will not know for sure until I get the manifold back from porting. I'm installing headers this weekend and planned on doing the manifold swap next weekend. I will make a post if all works out detailing what needs to be done.

 

[NicksA10]

I reached out to vmp about imrc harnesses for the mach one/ bullitt manifold. I was told they do not offer anything currently. I compared the wiring diagrams for the 21gt, mach one and also a gt350. I think I have it figured out but will not know for sure until I get the manifold back from porting. I'm installing headers this weekend and planned on doing the manifold swap next weekend. I will make a post if all works out detailing what needs to be done.

Reach out to vmp and ask them to put you in contact with mike weeden and ask him about the harness. Here’s some pics of how it looks and how it hooks up. You can dm me on instagram if you have any questions @nicks10r80

Sponsored