Over octaning a 2 cycle

[JaySmithRacing]

This is important enough I brought it forward on its own post...

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A 2 cycle engine has but an approx. 1.500" window to contain the total push that combustion creates. If the burn is not complete some of the push is lost because of its escape out the exhaust port. Equals loss of power. High octane fuels burn slower than pump gas and if the compression of the engine doesn't warrant the use of higher octane to prevent detonation the loss of power is apparent . The higher the octane above what is needed to prevent detonation the MORE power will escape as well as dollars from your pocket book....
Even at 225 lbs cranking compression at sea level I blend my race guys engines fuels and don't run "straight" 112-110...We have found through testing that one that has a handle on the weather conditions ( I use a Kestrell 4000 weather station to set fuel air raio for that particular day ) and fuel octane has an advantage from those that "guess"..

About oils I break-in on petrolium only and then on steel sleeved engines ( what you have ) use ONLY blends no 100% syn oils on steel, I've learned that lesson the hard way ..

Good luck,.

Jay

[Blevins]

So Jay what octane fuel do you recommend for a stock compression 2000 year model Mercury XR6 with the timing set at 24 degrees with timing module removed?

[JaySmithRacing]

I like Super Unleaded Motor Gasoline bought from a station which has allot of traffic...

Jay

[Blevins]

Thanks much appreciated.