OK. So the accepted wisdom is that if one sets the ignition timing on a Digi more than the factory amount , the engine can lose power and/or run worse. And that the ecu will retard it anyway. Which is acceptable on a stock motor. But any modded engine I've seen, with a bigger cam and a modded head usually likes to run more advance. My question is, seeing as the Digi doesn't have a cam or crank sensor, or any TDC reference for the Ecu, how can it know if you have added more advance than stock ,and as a result retard it back to where it supposedly should be? Surely the knock sensor can't be so sensitive ?
I would make a TDC ref somehow, ideally on the flywheel. Cut up an spark plug and make an adjustable dead stop ideally Jon
Only a rolling road session would answer that one satisfactorily for me. ie try different settings.. Jon
comes down to a lot of things, engien health, fuel quality, components used etc. 8 degrees is a good start point then work from there. preferably use a man with a big beard either real or metaphorical to fine tune everything together to get the best results. i.e. Eddie/Toyotec