ZEX-Z

iTrader: (4)

How much horsepower can you get out of the stock LT1 injectors?

GIZMO

iTrader: (8)

500+ fwhp at 50 psi in race applications N/A.

Formula350

iTrader: (3)

50PSI is pushing like 27#+ through the injectors isn't it?

LT1nitrouZ

with stock fuel pressure you are pushing your luck over 400 fwhp

siniSSter

iTrader: (2)

Try http://www.rceng.com/technical.htm

Its got a lot of useful caculations to further help your F.I knowledge

foggedz

iTrader: (1)

My stock injectors were at 95% duty cycle at 330hp.

C_Rules

iTrader: (7)

i used the first formula and for a 500 hp engine it calculates 39lb injectors.

i currently have stock injectors and i have 309rwhp. the tuner said those injectors were fine and my a/f ratio was good. i have a new cam and im going with the spray so im guessing i will have near 500rwhp with a 150 shot. i guess according to that formula i'll need 39lb injectors which i dont think they make. so i might have to get 42lb. injectors. does that seem right?

siniSSter

iTrader: (2)

@ 309 hp you'll be fine with the stock 24lb injectors. Although for the nitrous shot you may want to upgrade to 30 or 36 pounders..I have 624 hp to the wheels on spray w/ 36 pounders...seem to work well.

buffman

iTrader: (9)

IMO I dont like the idea of spraying on stock injectors. Well if they never lock you're okay, but if they lock, stock injectors lock closed and not open like most aftermarket injectors

foggedz

iTrader: (1)

If its a wet shot they shouldnt have any problems locking.