injectors

[sharkey]

im on the quest for a set of bigger injectors for my little 2.9l ironhead. i have a lot done to it (forged 9.5:1 pistons, ported heads, full comp cams valvetrain, headers, ect). now im estimating, and i know it may be bit hopefull, about 200hp once its properly tuned. using a couple calculators on the net, i figure it needs 20-22lb injectors. i know the 5.0l mustang injectos are a common swap, but what other cheap option are there??? what about 3100/3400 injectors. i know they are usualy to large for a stock 3x00 running MPFI computer, but what about a modified motor like mine??? i have someone offering me injectors from an ecotec, does anyone know anything about them??? is there even a chance they will work???

im just wondering what else i can run other than the 5l injectors.

[93camaro_zzz]

What are you stock injectors? I know the 3.8's have 19lb, and thats pretty close to your 20, maybe wanna try that out.

[torq455]

I know the 3400's are 19lbs. raise the fuel psi. doubt the ecotec injectors would work. however, i do know a stock 87 ish camaro 350 TPI has 22lbs and will work.

[AaronGTR]

'99 N-bodies and earlier with 3400's used 19lb/hr bosch injectors. 2000 and later had 22.5lb/hr delphi injectors. They were the same size and length but used different harness clips. Either one of those should flow enough for 200hp at the crank, especially if you have a way to tune the pulse width. 200whp though they start running out. You'd have to see if those injectors will fit your intake manifold and fuel rail of course. That I don't know.

[v6h.o.]

I have a set of 22# 93 LT1 Fbody Injectors. ONLY 93 Fbody LT1 injectors are 22#'s

94+ LT1's are 24#'s

[torq455]

Colin, are you saying there isn't a 22lb injector used in a 350 until 93? cause according to part #'s and documentation, the 350 TPI used 22lb injectors, and the 305 TPI used 19lb.

[Manitcor]

larger injectors will only help so much if you cant tune the PCM to use them properly

[sharkey]

thanx for the info guys.

i havent realy done anything yet, been busy with other projects. i am going to throw some larger injectors in so i quit throwing lean codes. i currently have 3.1l 16# set at 58psi. i dont yet have means to tune the chip, however i do have gmpcm and and going to be getting a prom burner.

[torq455]

hell, might just work to throw 19's in with that fuel psi. just remember, you don't want the jectors to run much over 80% duty cycle.

[v6h.o.]

Colin, are you saying there isn't a 22lb injector used in a 350 until 93? cause according to part #'s and documentation, the 350 TPI used 22lb injectors, and the 305 TPI used 19lb.

No what I'm saying is exactly what I posted in refrence to LT1's. I never said 350's or TPI's did did not ect.
I was stating what the LT1's used. And In 1993 for some reason the Fbody recieved 22# per hour Injectors. 94+ the Fbody got the same as the vette with 24#'s.

I thought TPI injectors were the wrong resistance/peak-hold rating than the 3.1L.
I can't remember. I know LT1's are the right setup for our injectordrivers.

[torq455]

hmmm, guess i'd better find out before i put those in. my dad knows all that stuff. i'll find out tomm