Injuneer

Depends:

If the BLM's were adding fuel in closed loop (BLM's above 128) the PCM defaults to Cell 15 at WOT, and used the BLM's.

If the BLM's were cutting fuel in closed loop (BLM's below 128) the PCM will use either Cell 15 of Cell 18, but lock the BLM's at 128.

So..... it you use oversize injectors, the PCM will have to drop the BLM's below 128, cutting the excess fuel. Then when you go WOT (actually, is called Power Enrichment, or PE mode) the PCM will use 128 as the BLM, and the injectors will be flowing 10% extra fuel, making it run richer.

1993zlt1

Yea there ls1 injectors got them out of a 2002 SS, they flow 28lb compared to th other years that flow 26lbs. Im going to try and grind the intake alittle shot work out hopefully.

93transam1234

they are NOT going to flow 28# on your car man, they will flow right around 26#.

They are rated at 28# on the LS1 because the LS1 uses a hight fuel presure.

1993zlt1

[QUOTE=Injuneer;5362838]This is the first time I've heard of anyone having problems with the length of the LS1 injectors in an LT1. Are you sure they are LS1 injectors?
QUOTE]

Thats why, I know they wont, He asked are u sure they are Ls1 injectors, and i said yea out of a 2002 ss

Injuneer

They will NOT even flow 26. They will flow (43.5 / 58.0) ^0.5 X 28 = (0.75)^0.5 X 28 = 0.866 X 28 = 24.2 #/HR. The stock LT1 injectors are programmed as 24.9 #/HR.