Running Lean

[Chris05]

Ok my fuel upgrades are a Walbro 255 and a fuel pressure regulator... fuel is running a 42 psi and turbo is at 10 psi... pyrometer goes to like 11 at 55mph but when I step on that pedal it while raise to 13-14 at 6,000rpm... I took my car to the dynojet and Air/Fuel is below the line... Running Lean?

 

[euphoria]

What size injectors?

 

[Chris05]

stock inyectors

 

[etay89]

stock injectors are already maxed out nearly on a stock setup. basically, you need bigger injectors. at 10psi, you shouldn't need anything larger than 650cc.

 

[Chris05]

ok ill try that one... thank you

 

[Colt4G63 also]

ok ill try that one... thank you

Don't forget the tuning mechanism.

 

[ziggo0]

stock injectors are already maxed out nearly on a stock setup. basically, you need bigger injectors. at 10psi, you shouldn't need anything larger than 650cc.

I've run 15 ~ 18psi on a 14b with 11.5 AFR's just fine on 450's. I wouldn't say 10psi is maxing out the stock fuel system, assuming he has 450's though.