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JWL · 01-26-2018, 06:09 AM

If "under load" means wide open throttle and if the timing is not slow the main jets might need reduced and PV might then need slightly upsized.

The average best power at WOT of all the Flathead engines I have tested the A/F ratio was 13.2. However, there can be differing readings from meter to meter.

01-26-2018, 06:09 AM	#3
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: wide band AFR If "under load" means wide open throttle and if the timing is not slow the main jets might need reduced and PV might then need slightly upsized. The average best power at WOT of all the Flathead engines I have tested the A/F ratio was 13.2. However, there can be differing readings from meter to meter.