I have just switched my dragster over from gas to alcohol (methanol). I have a couple of questions about timing and spark plug choice. The engine is a 572 with 440-1 heads, Ross Flat top pistons, 14:1 compression, APD alcohol dominator carb on a 440-2 indy intake.

The timing that I found to be about optimum for 110 race gas was around 35 to 36 degrees.

When on alcohol, do I leave the timing in this range or do I increase or decrease it?

I have been running NGK -8 plugs for 110 race gas. Do I run a hotter or cooler plug for alcohol?

Thanks

bob Spelic

Last edited by Bob_Spelic; 06/14/10 03:40 PM.