fuel injector question 
fuel injector question
Looks like they use similar injectors.
The LS3 injectors should be a direct replacement (regarding fitment) for your LS4 injectors.
The LS3 injectors should be a direct replacement (regarding fitment) for your LS4 injectors.
Last edited by deatschwerks; Aug 1, 2011 at 01:44 PM.
I agree with you there, since the guy is needing them for a turbo project I was assuming he was wanting them because they were bigger.
The LS3/LS7 injectors are ~34# @ 43.5 psi fuel pressure.
...and fixed my post to reflect I was referring to fitment.
The LS3/LS7 injectors are ~34# @ 43.5 psi fuel pressure.
...and fixed my post to reflect I was referring to fitment.
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TECH Regular
Joined: Nov 2009
Posts: 446
Likes: 0
From: Farmington Hills, MI
They drop right in and use the same connector. We have a 4 bar (58 psi) returnless fuel system. They flow 41.7 lb/hr @ 4 bar. However, I have noticed some irregularities which I partially attribute to fuel pressure not being measured directly by the ECM. Since the system is only regulated at the self-contained pump, the ECM assumes 58 psi at the fuel rail and uses the MAP sensor to find the actual pressure drop seen by the injector (engine vacuum increases flow). I have some work planned that will systematically get me to the bottom of the irregularity over the next 2 months. What year GXP? What tuning software will you be using?
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TECH Regular
Joined: Nov 2009
Posts: 446
Likes: 0
From: Farmington Hills, MI
Here is my thread on the irregularity I was referring to:
https://ls1tech.com/forums/pcm-diagn...frequency.html
The original injectors are going back in the car temporarily for a more careful analysis of the issue, but that won't be for a while yet.
