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Ol' Ron · 05-31-2019, 10:15 PM

A lean mixture needs more advance in cruise, and there only distributor that can providing that is the SBC along with the right advance under pow.. It get kinda tricky balancing this timing with the AF/ I start with 16 mechanical all in by 2k and 8 degs Vac I use the initial , just to get it started. This way you have aprox 26/28 degs in cruise, and 18/20 at WOT. Which will prevent detination on tje crapy gas we have. Haveing an adjustable Mach advance also helps. This might sound like allot of work, but the 5 plusK invested in the engine is worth it.

05-31-2019, 10:15 PM	#30
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: Air/Fuel Meter/gauge A lean mixture needs more advance in cruise, and there only distributor that can providing that is the SBC along with the right advance under pow.. It get kinda tricky balancing this timing with the AF/ I start with 16 mechanical all in by 2k and 8 degs Vac I use the initial , just to get it started. This way you have aprox 26/28 degs in cruise, and 18/20 at WOT. Which will prevent detination on tje crapy gas we have. Haveing an adjustable Mach advance also helps. This might sound like allot of work, but the 5 plusK invested in the engine is worth it.