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Old 05-21-2015, 01:23 PM   #4 (permalink)
ever_green
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Join Date: May 2011
Location: Toronto
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Blueberry - '17 Mazda Mazda3 GS
90 day: 32.56 mpg (US)

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Quote:
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)...is 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 economy...is 17:1 good enough?
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