Reply to thread

There is probably an advantage in having the ignition to advance as the revs rise, to compensate for the change in rock-over time. The combustion process is a fixed time event.  It would cause maximum combustion presuure to stay at the same point in the rotation of the crank.  The advance curve should probably be a function of the ratio of conrod length to the stroke. If we have the equation, it is easy to set up the advance curve in a programmable ignition system, When you use methanol as a fuel, the balance between ignition advance, fuel ixture and compression ratio is not so critical.  But if I was going to race again, I might buy a programmable Boyer.