Now the ignition timing on a stock engine is to be done at idle (850rpm for my GSL-SE). Obviously a bridgeport (for example) isn't going to idle at 850rpm. So how is the timing done on a ported engine?



J

the racing beat catalog says to set the timing at 4000rpms, after the advance is all in



mike

I just eliminate the centrifugal advancement. Ill try to post a more proffecional post tomorrow, Im just Xtremly tired, And Im going to sleep.

Couldn't you just set the idle at 1300rpms and do it there?Just like a stock port timing setup?

For high performance engines (piston or not) you always want to set the timing at high enough RPM's to be at full advance. When you're racing you don't care what the timing is at idle - only what it is where the engine was built to run. Yes, if your distributor has a centrifugal advance it is referred to as an advance. But, it's more accurate to think of it as an idle retard... So you want the baseline timing to be dead on for max HP, and whatever it ends up being at idle is unimportant as long as you can get it started.



Jason