Turbo Charged - Precision Turbo & Engine
I went from a 84mm to 91mm S400 . Both turbos from Forced Induction .
Just put it on the brake for the first time with the track tune .
Only made 7psi @ 4200 rpm no matter what I put on the gate .
The 84 made 11psi very quickly , the 91 takes twice as long to make 7 psi .
So now I wonder...