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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#60644 05/19/2006 5:33 AM | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | On a 12 inch flywheel it would be about a tenth of an inch per degree, or about an inch for ten degrees. Just advance the timing until it pings under load then back it off until it no longer pings. The fact that it smooths out when the centifugal advance is all in but falters if you give it much throttle (because the vacuum drops and you lose the advance due to vacuum) are good indicators of insufficient advance. | | |
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