1G GSX – E85 – Sam Dyno Tuning With DSM Link

Sam  here at the shop tuning with DSM Link on Kris’ 1G GSX track car is running a used stock 6 bolt long block from a used 1G 140k mile auto DSM he picked up. FP 3065 (GT35R-ish sized) bolt on style turbo. The fuel pressure was dropping big time once the boost got up past 30 psi. With a Walbro 255 lph pump not keeping up, with the car still on the dyno we put in a Walbro 400 lph fuel pump, reset the base pressure and Sam went at it some more. That fixed the fuel pressure problem. There is a bit of surge on the spool up, nothing we could do about it. It is just there on a longer pull on the dyno.