I got the g coupe coupe with an ati procharger with exhaust headers and race pipe, walbro 255 fuel pump and 440cc injectors along with the osirus tuner and was pushing 330whp before tune/injectors/pump.
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.
can anyone help?
thank's

 

you should post this in the forced induction section. you will get more help. im turboed and also am thinking about getting it the next time i go in for a tune. i would assume it will help the tuner adjust the fuel under boost but i havent begun doing any research yet as im flat broke haha