have an 08 silverado im doing an lsa blower swap on, with zl1 lid, lsa injectors (56 or 52lb, cant remember), 2.5 upper, stock balancer, 1 3/4 headers, full 3 in exhaust. ill be making in the 13-16lbs of boost range. will 56lb injectors support 500ish hp on 93? also with my truck being flex fuel will i be ok with the stock pump? just trying to make sure i have all my ducks in a row

 

I hope you mean dual 3", those injectors should support that power fine on 93. As for the pump, I am pretty sure the FF pump will push that on gas but I am not positive on the flow numbers.

 

i meant single 3" lol. so i guess at some point i would need to step up to a 3"true duals or would a 4" diesel exhaust work better?

 

Yes more exhaust will help you. The fuel system will be close to its limits I would guess. You will drop pressure at WOT making the injectors work even harder.

 

So at this point would it be better to step up to maybe a 72lb injector? Would a boost a pump benefit me any? I know there aren't alot of fuel pump options for the flex fuel trucks with the fpcm

 

You need a lot of injector to make up for the non referenced fuel system. Also, 500hp and 16lb on a 5.3 are slightly different goals.

 

That makes sense. So I guess in a sense what is a more reasonable? Are you saying 500hp on a 5.3 is pushing it? And in what ways are they different?
Just trying to get a realistic understanding of where/can I wanna be power wise

 

I have a 2.55" on a 5.3l with stock balancer and stock injectors and it was fine. Full stock exhaust now with gutted cats and only making 12lbs. Before I gutted the cats I was around 13lbs. Duty cycle on 93 was around 84% with the stock injectors.

 

I sent the stock injectors to FIC to mod to 1000cc for $240 and am running e85. Duty cycle is like 55% or something on e85 now.

 

Was this on the lsa injectors? so your not out of fuel pump on e85?