Will a FAST 90/90 fit on an LT4? If so, what modifications will I need to do to make it work, if any? Thanks!

 

totally different engines.

i think the angle of the heads where they mate to the intake is different. as well as the size and location of the intake ports.

not to mention to LT1 doesn't have the sealed lifter valley like the lsx engine.

you may as well try to figure out how to put a 6 cylinder intake manifold on a v8...

 

No, Fast 90/90 will not fit lt1. No modifications will make it work.

 

That sucks. I just bought a pretty much fully modded out 95 TA, exept rear end and cc, basically. I'm at 375 rwhp. I want to be able to keep up with my buddies 03 z06. It's stock, factory rated at 410 hp. A4, btw. I'm looking for some extra giddy up to shut him up. I was thinking of switching cams. Maybe a 224/230 cam with .570 lift or so. Saw one at High Tek. I can, with a friend of mine's help, switch out the tb and intake manifold. Cheaper option, figuring in labor, than a cam swap. Guess I was just day dreaming. Any other suggestion to pack more punch. I was thinking of taking out the back seats and a k-member and a arms package to reduce weight. This is a street ride so I don't like most of the weight saving options, besides the ones I mentioned.

 

The LT1/4 motors are not like the LS1s, you can't gain tons of HP by switching the intake manifold and throttle body. You need a different cam, that Hotcam isn't known to make that much power.

 

gears will make a world of difference.

but yeah...a bigger cam will too

 

hose it with a small shot..like a 75 shot..that cam loves the n2o