Originally Posted by djagusch
Also to take the full advantage of propane what compression ratio's have you guys tried. The 8.5:1 ratio (or less) seen in most mower engine's leave some power unused when using propane. Is a 11:1 more in line of getting the full power of propane?
We do nothing with the compression ratios. OEM is OEM.
I know from first hand experience that propane is quite comfortable at 10.5-11:1. In 1984 I did an L88 427 at 11:1 that maxed my Dyno. It was in the pickup of a man with entirely too much money. Hope this helps.
Actually you may want to google Susan Roush of Roush Racing. We sponser her Mustang.