QuicksilverZ28

I have a 97 LT1 with an ATI P1SC blower on it, I am current running 8lbs with the stock fuel pump with inline helper pump with 42 lb. injectors. I want to upgrade to a 12 LB pulley and a racetronix single intank fuel pump but keep my 42 lb injectors? Will keeping the 42 lb injectors be ok? I have a fully forged bottom end with a decent sized cam but I only rev it to about 6200 RPM. Do you all think this will work ok? Let me know what you all are running with your blowers, boost, fuel system, etc.
Thanks
Aaron

Racetronix

Once you have a good idea what your FWHP will be you can use these forumals to determine your required injector sizing. This is assuming stable fuel pressure using a rising-rate fuel pressure regulator with a 1:1 ratio. Remember a DC of 80% or less is required for stable injector timing.

Time Available to Inject in mS (TAI) = 1000/(RPM/(720/NumCyl))
Injector % Duty Cycle (InjDC) = (InjMS*TAI)*100
Fuel Flow in Lbs/Hr (FFLB) = (NumCyl*InjFlow)*(InjDC/100)
Injector Sizing InjFlow = (Est. HP*BSFC)/NumCyl
Injector % Flow Change vs. Fuel Pressure 100*SQR(OldFP/NewFP)

QuicksilverZ28

what size injectors do people usually use with this type of setup? I am hoping 500-550 RWHP range. Im just trying to see if its even possibly with 42# before I buy all the stuff or if I should look for some injectors. What would be a good injector for my setup that isnt too much but isnt too little either?

94SLUG

I have 42lbs with gss340 and msd boost a pump. Fuel pressure never drops. Than again Im not pushing 550rwhp maybe 480ish. Your other option is a 50lb, and some people have had problems with them. If not theres low impedence which can get a little pricy, and you need the converter box.

my site has pics full mod list