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I know 12.5 has been bandied about as the so called optimum a/f in boost at WOT.
Are there any reasons to go higher, or lower?
 

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Re: Appropriate a/f ratios? (Cypher2k)

You may need to make adjustments based on egt's also. 12.5 is good but if you're egt's are still creepin up then you need to look to timing. Add as much as you can given your octane rating and within the safe limits. If egt's are still high, you'll need to fatten it up a little. I like to keep mine around 12.2-12.3 daily driving and 11.8-11.9 when turning the boost up and running more timing with race gas.
 

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Re: Appropriate a/f ratios? (Cypher2k)

12.5 is the recommended a/f ratio for a daily driver...
While a car that is strictly for racing might dial in a leaner ratio in order to extract more power.
Not sure where a fatter mix would be used...
 
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