Going lean, Cause of TUNE?
#1
I kinda of have a stupid Question. But am wondering if anyone has experienced this.
Last week I ran the truck at the track and found out that I am maxing out my injectors at around 5000 rpm's. it just completly falls flat on its face.
Well before i started tuning the truck I would get on it hard sometimes and the cam would pull like an ape up until 6000 rpm's (the way that it pulled it felt like it would still pull hard for another 500 rpm's, but I never tried it).
The point is can a tune cause you to max the injectors out. Keep in mind I have not changed anything with IFR. All I have done is adjust the VE table added some timing part throttle and at WOT. When I adjusted the VE and got on it hard it would still pull hard as hell, with only this adjusted. at part throttle the truck feels great and pulls hard.
i am running 25lb injectors
Last week I ran the truck at the track and found out that I am maxing out my injectors at around 5000 rpm's. it just completly falls flat on its face.
Well before i started tuning the truck I would get on it hard sometimes and the cam would pull like an ape up until 6000 rpm's (the way that it pulled it felt like it would still pull hard for another 500 rpm's, but I never tried it).
The point is can a tune cause you to max the injectors out. Keep in mind I have not changed anything with IFR. All I have done is adjust the VE table added some timing part throttle and at WOT. When I adjusted the VE and got on it hard it would still pull hard as hell, with only this adjusted. at part throttle the truck feels great and pulls hard.
i am running 25lb injectors
#2
When you increase the VE table you are adding fuel.
I was seeing around 125% duty cycle with the 25lbers but it would keep pulling, when they are just open you'll notice you wont have any control over you PE fueling. Get some 31lbers they will take care of it.
I was seeing around 125% duty cycle with the 25lbers but it would keep pulling, when they are just open you'll notice you wont have any control over you PE fueling. Get some 31lbers they will take care of it.
Thread
Thread Starter
Forum
Replies
Last Post
kr1s
Tuning, Diagnostics, Electronics, and Wiring
9
Aug 24, 2015 05:34 PM
05GMC4.8
GMT 900 Trucks General Discussion
5
Aug 7, 2015 09:55 PM



