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Early_S_Man Early_S_Man is offline
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Join Date: Dec 1999
Location: TX USA
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Back in the days of Holley carbs to get max power out of a V-8 ... 12 - 12.5:1 used to be the target A/F ratio to get max power under acceleration! Of course, that was in the days of long-duration, high-overlap cams and 12.5:1 compression ratios, and part of the rich mixture was lost to exhaust scavenging and dilution by burnt combustion products. Avoiding detonation on 100-octane pump gas was also a consideration!

So, that 13:1 may not be far off, from a max power standpoint ... with 11.3:1 compression ratio, detonation is still an issue! Sounds like the DME is running in default rich mode.
Warren Hall, Jr.

1973 911S Targa ... 'Annie'
1968 340S Barracuda ... 'Rolling Thunder'

Last edited by Early_S_Man; 01-03-2004 at 01:33 PM..
Old 01-03-2004, 01:18 PM
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