+40% injectors

[stoney wilson]

i have a 1988 shelby z and i am using the +40 injectors and i was wondering if the stock fuel pressure is fine to use or do i need to lower the fuel pressure

[slasky]

What computer calibration are you using?

[stoney wilson]

i am using the stage 4 cal from front wheel drive performance

[puppet]

Are you monitoring A/F at all?
With their stage 5 ECU I was using 45-47psi FP FWIW. Still enough fuel for 20+ boost level.

Just realized your in TX. How far are you from their shop?

[stoney wilson]

i am about 3 hours from the shop. i think the fuel pressure is to high and the car is getting to much fuel. when the car is under boost its fine. but around town it jerks or some thing like that. it idle really good, then it idle rough then good. seems as though it may e a sensor