Originally Posted by
superls1
You probably already know this:
BSFC x HP / # of Injectors = Lbs/hr rating of injector @ 100%
BSFC - Brake Specific Fuel Consuption; it is a measure of how 'efficient' the engine is at converting fuel to HP; the lower the number, the more 'efficient' the engine is; I use .45 for the LSx engines
HP - use crank HP (estimate if not exactly known)
So, assume 550HP at the crank (or 468RWHP assuming ~15% drivetrain loss):
.45 x 550 / 8 = 30.93 lbs/hr
Remember, this is 100% duty cycle, and you want some margin of safety. So, shoot for 85% max duty cycle. Therefore, divide by .85
30.93 / .85 = 36 lbs/hr
Let me know if I can help.
FYI, the C6 Z06 has ~40lb/hr injectors. I have used both the Ford 36# (43 @ 58psi) and the Racetronix 42# (48 @ 58psi) in some 402 applications. I have good results with both.