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great thread, and just in time for me to work on the timing table for my EFI/ignition control project. It has been explained to me like this: An engine at WOT is at it's highest efficiency, any throttle less than 100% is less efficient and therefore needs more timing advance to compensate. In my experience with user programable efi i always targeted 25-30 advance at idle then moved to 35-38* as the engine approached 2500rpm and keep it there till the onset of boost. So i tend to agree with everything you've mentioned so far, except i will not be keeping the dizzy. crank trigger/coil pack and full user control is the way i'm going. I'll be able to dictate how much timing the engine will see in every rpm/load scenerio possible.... my biggest issue right now is WHAT those numbers should be.... i'm all ears
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