mase made 601 out of my 750 injectors but they were maxed out, that was with a gt35
with the gt30 i think he was running them at 545 or 575

 

hmm sounds lik they will do fine to me then.......I think I am going to go with a 2mm headgasket, then I won't have to run as much boost.

 

750 are fine for the power you are looking for. I will be running the same.

 

im shooting for 500 with 750s, hope they r enough

 

im running 650's right now at 410... still room for a bit more so sayith my tuner

 

It is very dependant on what Fuel pressure your a running the injector at and what they flow at the manufacturers rated pressure. RC rates there injectors at 43psi.
If the BSFC you use is very low, then you could run a ton of HP with 750cc injectors but turbo motors tend to run rich for safety and your BSFC # will be higher.

To calculate your new flow on your injector (i.e. what it will ACT like at higher pressures just use the New Flow = Old Flow x Sq.Rt (New Pressure / Old Pressure).

so if you run your 750cc RC injectors at 70psi you would effectively get 750xsqrt(70/43) or 956cc/min or 91lbs/hr. (which btw is WAY past what a 255lph pump will feed at 70psi). That is why most tuners will tell you have have alot of room left on your injectors, if you are running higher fuel pressures you can get more fuel for short periods. Running long wide open runs might lead to a lean out on a cylinder as the fuel pump pressure drops at high duty cycles.

but the answer is 750cc injectors can feed 450 HP easily and with the right fuel pump alot more.