Quote:
Originally Posted by Ant
This would still bring me back to work out how best to run an advance curve with crank trigger.
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And here is the crux of the issue. A crank trigger that runs a single linear advance curve probably won't help you much. It will certainly be more stable, but you could be missing out on some power and (more important) drivability.
I use an ECU controlled coil pack, wasted spark, and a 36-1 crank trigger wheel running a VR sensor in a custom made sensor bracket.
Megasqirt Photos by bobcowan | Photobucket
Basic timing is based on engine load and RPM. But the basic map is then modified by things like intake charge temp, coolant temp, ambient air pressure, fuel type, etc. The goal is not only to make good power, but to adjust for various conditions on the street, and prevent detonation.
The crank trigger makes sure that the ignition system does exactly what the computer tells it to.