Krister said:
Why is there such a small gain in power when going from 19psi to 26psi? 500rwhp vs 557rwhp ???
I might be getting to a point where the a/r on the turbine is causing too much back pressure. I talked with SP when I bought the turbo and they said in this configuration that it should do around 680 to 700 hp at the flywheel so I figure if I can get 600 rwhp or close at 30 psi I'll be happy and then I might change a/r's and go to a .81.
When I built the engine all the pistons, rods, combustion chambers and such were brought to the same weight as each other. ie all the pistons weighed the same, all the rods weighed the same and so on.
88 turbo
7m-gte/HKS 1.2 and ARP bolts
SP67GT with a p trim and .68 a/r
vpc/afc/itc/680's
4 inch exhaust
HKS intercooler and piping
Aeromotive pump and Kirban regulator