1995 454 TBI questions

[Christian Steffen]

You won't reach 600 with TBI but you could come close with Vortec heads and MPFI from 96-99 and an aggressive cam. Hey, if your rebuilding, you might as well go all the way. Make sure you use the upgraded Injector Spider from from 2003-2007. Although the 454 may have already had that in 96-99. Not sure. I know the 350 MPFI did not.

96-2000 454s don't use the spider, they use the normal style injectors found in every ls. Vortec heads definitely won't support 600 hp though, not without boost anyway.

 

[Schurkey]

Vortec BBC heads aren't the performance boost that the 5.7 Vortec heads can be. There was a magazine article bragging them up when they were "new". The article is full of holes and errors. I found that out AFTER I bought and installed the heads.

I had 454 Vortec heads on the Mk IV 454 in my boat. They're all done at 5200 rpm, and not all that special below--at least in my application where low-end torque is useless.

I'm doing better with oval-port Mk IV heads, and big valves.

 

[94burbk1500]

My family drag races and we've run quite a few race cars with 700+HP whose engines started their life as a TBI 454, one of them was a high revving ****** Granted, that's all forged internals, new crank and cam, AFR race heads, open exhaust, giant carburetor with methanol, the list goes on and on and on. Solid block though.