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Old 05-21-2015, 01:23 PM   #4 (permalink)
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gueff - '19 Mercedes Benz A250 4MATIC AMG
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Originally Posted by Daox View Post
Whats the question?

If you try going leaner you're going to have to advance the timing as I'm sure you know since a leaner mixture burns slower.
yes my concern is how much more advance? I'm already up about 5* in timing ( mid 40s now) it safe to hit 50* IGN? will that actually improve torque? I would be curious to see how the insight reacts when it switches to lean burn operation in terms of timing.

also my main question I guess is which will be the best air fuel ratio approximately for best fuel 17:1 good enough?
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