After searching for a while I havent really come up with a good answer.
Using a fuel injector calulator I cam up with:

Engine Crank HP = 500
BSFC = .60 Turbo Application
# Injectors = 4
Max Duty Cycle = 80%
Fuel Pressure = 45psi
cc's Needed = 968.75

So obv I have seen tC's on here with smaller cc injectors than that and are still pushing 450-550whp. Is this due to the 1:1 FPR??????

Using a fuel pressure change calculator and changing the pressure to 65psi on a 700cc injector (Adjusted with the 1:1 fpr for 20psi of boost pressure)....a 700cc injector would have the same output of a 855cc injector?

Pretty much I am trying to decide what the max HP I can get out of a 700cc injector with a 1:1 FPR. I will be running 20psi of boost pressure and expect to get anywhere from 400-500whp. Any thought will help.

 

Forgot to mention, I also have a 255lph Walbro fuel pump installed

 

thanks guys

 

Hey i wish somebody would post cause It would be interestign to know if your calculations are right or whats the variable that makes them off.

 

I have 700cc on 20psi and pushing 427whp with pump but no fpr. On 90% duty cycle I think it was.

 

im maxing out my 900's even using meth to help fueling :o darn raised redline :/

 

do you have an fpr chad?

 

im running rc 650cc injectors, walbro 255lph pump, and stock everything else fuelwise. im making 411whp on a mustang dyno,(450-470 dynojet) @ around 80% duty cycle. im also running 100% meth injection. not the best way to make that much power, but it will work until i get a return fuel setup.

 

dang guys....fpr was one of the first things i did.....im just going pure ethanol instead of running meth....nothing like some good ole moonshine fuel

 

Lol damn Brett making that much power and only 80% duty cycle that's good.

 

Thanks guys! SO i guess the 700cc, 255lph walbro, fuel return and adjustable FPR will do fine for 400-500

 

should be......might need 900's