I have a lt1 396 with 190 Afr heads Long tube headers, 245 254 dur comp cam Th 350 w 9 inch coan convertor with ford motorsport 30lb injector with 28 inch tires. Do you think I need bigger injector. How fast doyou think the car will run. Right now I have a mail order Ed wright program. My compression ratio is 11.25:1. I am running stock fuel pressure with stock reg. What do you think

 

The 30# injectors are only good for 450flywheelHP if you hold the duty cycle to 85%. You should be well over that with the specs you list. You probably need either 36's (530HP) or even a set of 42's for max headroom.

 

I agree with Injuneer. 42's would work well for your combo.

 

Another vote for 42lbs injectors. I think they are in the 60ish-65ish % Duty Cycle Range on a 400-430rwhp NA 383.

 

Bump