Does anyone with stage 4 GTR have their Air/fuel ratios recorded from a dyno run in race mode with race fuel?

Mine are high, roughly 13.6@5500 RPM (lean) and would like to know if anyone else has experienced this as well

TIA

 

With race fuel it's really ok to be leaner than the usual mid 12s. It's pretty safe as long as you're running 100 octane or more...

 

Alex,

I lost 10 HP and 16 lbs of tq after the plenum install

maybe starving for fuel up top?

 

Maybe you have a boost leak or another issue. The box picked up HP on the GTRs we tested. You need to pull the box and re-establish a baseline then work from there.

 

Ron...

How did Ken do with his revised setup?

 

Bill,
I will let Ken reply
I on the other hand need a 5 bar fuel pressure regulator, thanks again Stephen, you always put a smile on my face!

 

Always glad to help. That is what I am here for.