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Timing Gurus, ? on Flame travel, TDC, dwell time, etc

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Old Dec 14, 2005 | 07:57 PM
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mobebk's Avatar
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From: san jose, ca, US
Default Timing Gurus, ? on Flame travel, TDC, dwell time, etc

When u advance timing u get better throttle response because the spark is created before TDC, so when its at TDC, your flame will travel throughout the mixture creating the most power before traveling through the exhaust? (also creat a high sidewall load)

If too much advance is done, the flame travel starts way before TDC and it works against the motor causing it to run hotter and lean. ????

If you wait too long on and retard it too much, the flame starts way after TDC and the explosion power is less because by the time the flame travels through the mixture, it finds an exit out of the exhaust.

Please let me know if my way of thinking is correct, its been driving me crazy on theorizing how to tune my timing maps so I have a few setup so when I put them on the dyno, Ill see which way creates more power for me without downtime editing. I wanna run a consistent 12.5-12.9 AF ratio at WOT and have setups with 24.5, 26, 27.5, 29 degrees of advance
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