Question about fuel injection from a newbie - Page 3

Kdw1403 · 05-04-2017, 04:08 PM

What is maximum size fuel injector for a lt1 stocker engine. what pulse rat and duty cycle should i run them at? Having trouble with A/F ratio. Right now it is reading 14- 14.5. Never gets below 14. lots of low gear time reading 15. I have raised fuel pressure from 45 to 60 with no change in a/f ratio.30 lbs injectors now. I have been told that is really lean. New to Fuel injection. Has a fast xfi 2.0. can something be set wrong on the tune and cause the computer not to let it richen itself up. Running in closed loop now but same problem in open loop. Target is set to 12.8. closed loop high rpm is 2500 Low rpm is 2400. I just installed a fuel psi moniter to my data logger but havent got to run it yet. aeromotive a1000 pump. Anybody ever had this problem where you cant get A/F ratio to adjust?

05-04-2017, 04:08 PM	#1
Kdw1403 Member Join Date: Nov 2016 Posts: 202 Likes: 47 Liked 68 Times in 22 Posts	Question about fuel injection from a newbie What is maximum size fuel injector for a lt1 stocker engine. what pulse rat and duty cycle should i run them at? Having trouble with A/F ratio. Right now it is reading 14- 14.5. Never gets below 14. lots of low gear time reading 15. I have raised fuel pressure from 45 to 60 with no change in a/f ratio.30 lbs injectors now. I have been told that is really lean. New to Fuel injection. Has a fast xfi 2.0. can something be set wrong on the tune and cause the computer not to let it richen itself up. Running in closed loop now but same problem in open loop. Target is set to 12.8. closed loop high rpm is 2500 Low rpm is 2400. I just installed a fuel psi moniter to my data logger but havent got to run it yet. aeromotive a1000 pump. Anybody ever had this problem where you cant get A/F ratio to adjust?