I got the g coupe coupe with an ati procharger with exhaust, headers, and race pipe. I am pushing 330 whp.. I have the osirus/ deatchwerks 440cc and the walbro 255 fuel pump now.
During the tune, We had trouble maxing out the stock Maf sensor so I purchased the HPX MAF sensor.
My question is,
Is a return fuel system needed when using the HPX MAF sensor to get a proper tune? or is that something I could or should install in the future?
Uprev suggested that I install it for proper tuning when using the HPX MAF, but other shop's using the the osirus tuner say that it's not needed until I hit around 425whp or more. My goal is to have about 380whp

thank's

 

no you dont need a return fuel system. you can easily run the stock fuel setup close to 400 hp with the right sized injectors.

 

^+1 You do not need a fuel return system for your setup.

 

Why you had trouble with stock MAF? when you pusing down only 330?

Maybe G and Z are diff.