Quote:
Originally Posted by johndaroza
Even on 9.5:1 you are at risk if say you get bad gas . Best is 9.3:1 stock piston for USA. You'll get more from a nice set of headers and chip,,or carbs or ITBs
|
My euro '83 SC 930-10 is 9.8:1 and we only get 91 Octane in Az. I do run ACES IV booster but have had no issues in up to 110 degree ambient heat. Runs cool.
Had no problems with the 9.3:1 930-16 US spec '83 for 2 years in the same environment.