Im in the process of building a 408w. But I'm confused on how I calculate fuel system setup. I'm running Trickflow R series heads and R series intake with 90mm throttle opening and a comp cam xfi-236h roller cam. Based on this powerband how can I make a calculation for fuel delivery. Any advise would be apprietated

 

Going n/a? Im guessing 30-42#s injectors with a good regulater and fuel pump...check into aeromotive

 

Did you have an idea about how much power your engine is going to make? Looking at the cam, it seems capagble of putting out around 500 (given the size of the engine and the heads).

39 to 42 lbs injectors should do it thats 530-570 HP (at the crank) N/A @ a 85% duty cylce.

Really the thing to do is figure out where your going to be in terms of power by comparing similar builds and then shooting for a set of injectors sized around that if your just taking a poke in the dark. Otherwise the thing to do is get the motor dyno'd and make an informed choice.