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Tuning Process regarding advancing the ignition angle

EFI Tuning Fundamentals

Discussion and questions related to the course EFI Tuning Fundamentals


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In relation to the Ignition Tuning Process regarding advancing the ignition angle to the point where it is becoming counter productive and the peak cylinder pressure is acting on top of the pistons travel and centrifugal motion as it it moving up the bore creating more pressure on the rolling assembly of the crankshaft and conrods. Would this mean that it would take longer for the engine to reach maximum RPM and thus could be timed in Milliseconds of this effect?

The reason I ask this, is because this were true this would also mean that if you wanted to assist an engine to reach maximum RPM sooner Ignition timing could be pulled out of the Map.

If the engine is producing less torque because it's over advanced (or under advanced) then yes, it will take longer to accelerate for a given set of operating conditions. Timing the rate of change of rpm may show you some evidence of this however unless you're comparing MBT timing with timing that's a long way advanced or retarded of MBT, I doubt you could use this as a guide to tuning the ignition.