Timing Advance
Le Mans Master
Joined: Jun 2004
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From: Seattle WA
St. Jude Donor '14
Without being on a dyno, I can't see how you can determine if anything you're doing is making more power. The general advance curve for a GEN I SBC is pretty well-documented, and more advance doesn't automatically mean more power.
Le Mans Master
Joined: Aug 2006
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
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Initial timing at idle means nothing especially when the advance curve is not specified. The factory settings are simply a reverse engineered reference number that make it easy to set timing during 'tune ups'.
