mpe331lx

iTrader: (5)

At what PSI are the stock LT1 injectors rated at?



I am planning on running 36-42 lb injectors in my Wifes LT1 when it get the AI H/C package. I just happen to have a set of stock 03 Cobra 39lb injectors. An EV1 to Ev6 adampter would be much more cost effective then having to by new injectors (Read: Cheap!)

I remember reading about somone mistakingly using a set of 30LB ls1 injectors in thier LT1 and it went dangerously lean (they had a mail order tune for 30lb injectors). The LT1s injectors were rated at a lower PSI, than the Ls1. So the 30lb ls1 inj in the LT1 flowed considerably less than its advertised flow rate.

I want to avoid that problem by doing as much research as possible.

I did some searches and came up with some general fittment threads:
https://ls1tech.com/forums/lt1-lt4-m...ctors-lt1.html

https://ls1tech.com/forums/lt1-lt4-m...ctors-lt1.html

mpe331lx

iTrader: (5)

I may have found what I wanted to know in this thread:
https://ls1tech.com/forums/lt1-lt4-m...it-my-lt1.html

Can anyone confirm that 43psi is what the stock LT1 injectors are rated at?

blackz93

iTrader: (2)

43.5

koolaid_kid

iTrader: (21)

Stock LT1 injectors are rated at 3 bar (43.5 psi).
3 bar is the industry standard for rating injectors. LS1 injectors are also rated at 3 bar, but actually output more because they run at 58 psi. Hope that makes sense.

robsquikz28

iTrader: (246)

43.5psi is correct!!!!!!!!

mpe331lx

iTrader: (5)

Thanks guys, looks like 03 Cobra injectors it is!

LT1

iTrader: (1)

94-97 LT1 24# 43.5psi