I dyno'd my 1990 SPG at the SOC and got 232 WHP! That's 50HP more than at Carlisle in May (181WHP).
I did it by tracking down any vacuum leaks, which included some non-working check valves (I wondered why my HVAC valves would whistle under boost) and scrapping my crappy, badly leaking, EGR system the SPGs had. After that, I could easily hold tons of boost!
There was another C900 that got more than 250 WHP.
I did it by tracking down any vacuum leaks, which included some non-working check valves (I wondered why my HVAC valves would whistle under boost) and scrapping my crappy, badly leaking, EGR system the SPGs had. After that, I could easily hold tons of boost!
There was another C900 that got more than 250 WHP.