From what I've read, the T28s are more or less a "gimmik". However, that's what is on my car, and I'm looking to make the best of it

What do you all think would happen if I upgraded the injectors to 555 and ran the boost up to 15-17 with the T28s? Or is it hopeless without upgraing the huffers?

 

You can make plenty of power with those. Look at Rizz's link page and look at the stage charts.

 

You may need to go with 740's instead of 555's.

 

What's the cut off? I've heard the stock 370 are good up to about 380HP level. What will the 555 pull before you need 740?

 

dude trust. jsut go with 740cc's 555's I believe top out at like 23 PSi or some ****. so If ure gonna upgrade to T258's add teh folowing

740cc injectors
Down pipes
Exhaust
test pipes
clutch
ECU upgrade
Hard pipes
and Upgraded IC's

the if i'm correct you shoudl be at arround 400 -450 RWHP

 

If you're talking about running 23 psi, then you'll need a hell of a lot more than what you listed. With T28's running 23 psi you would be way over 450 RWHP.

 

No I said "i believe 555cc top out @ 23 PSi. not that u woudl be runnign 23PSi

 

nonetheless, if you're going to be runnign a high boost setup (20psi or more for more than occasional track runs), I recommend upgrading your internals.

 

That's where I was going with my statement.