Ignition Timing Curve Thoughts

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#5 (permalink)

07-13-2013, 11:02 PM

vector1

CC Member

Join Date: Dec 2004

Location: Kansas City, KS

Cobra Make, Engine: jbl

Posts: 2,291

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I did an unexperimental analysis of with and without vacuum advance and figured it was worth 2 mpg. I am a believer in using it, quieter and snappy and can be easier on valves & exhaust. I had the carb tuned to run on the ragged edge of leanness at cruise, when I hooked up the vacuum advance I had to richen the transition slot at least one size, maybe two.

Last edited by vector1; 07-13-2013 at 11:04 PM..

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