[scottj]

I've run 98% pure methanol. An engine requires 2.2 times the methanol and 1.6 times the ethanol compared to gas. At 85% you would need about 1.4 times as much as gasoline. Without a carb (or injection) change you would be very lean.

Pure alcohol also produces about 10% more torque than gasoline. The factors that cause the increase in torque are the same factors that require a different cam than a gas engine or a substantial amount of power is wasted out the exhaust pipe.

Advance the timing? If your timing is optimal advancing it will decrease power. If your timing is retarded, alcohol will allow you to optimize it. I ran 4 deg. LESS timing on alcohol.
Scott