hello everyone. can someone answer how much power a stock 305 tpi fuel pump can handle? my engine is a 425-450 hp 406 with a holley 750 dp (if that matters) i plan maybe adding a 100-125 shot of nitrous in the future and just want to see if the stocker can handle it, if not i already have a mech. fuel pump from holley thats rated at 110gph. thanks for your time

 

On my 5.7 tpi, at 9 psi I was running near 100% duty cycle with 65 lb/hr injectors using the stock pump. 9 psi on a stock psi is around 350 crank hp. I've read of people at 400 hp with stock pumps. Of course you will be stepping down to a lower fuel pressure and it becomes a question of volume. I don't think I'd risk it though, but if you do, let us know what happens

Sounds like it will be a fun car!

 

thank you zz3astro. i'm thnking about using the stock pump to break everything in, then when i get back from basic training switching it all over to the mechanical one i have. if anyone has any thing to add please post it up! thanks

 

I run a tpi pump. tbi 80 lbs injs at 20 lbs FP. my motor is about 350 hp. i run 75hp n20. last season i was seeing 11.0/1 at wot with n20 on. i believe DC was 85%