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Afr


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Last night I measured my afr and i would like to share with you guys and tell me what to you think about it

at normal driving: 14.5-14.7

~3000rpm: 12.8

4000rpm: 12.5-12.7

5000rpm: 12

6200++:11.7

Thanks!

The 14.7 at normal driving is good if you want good fuel economy...it's the stoichometric number for best use of Air and fuel, but... it's not the best number for power.

But it looks like your car is fattening up the fuel the higher it revs so that's good and the fact that it's 12.8, 12.5, 12, etc is awesome. If you can keep the AFR close to 12.5 without detonation than you're optimal for power too. You just don't want to run that lean of AFR at high revs on a boosted car if you're getting knock. Looks great to me...

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Last night I measured my afr and i would like to share with you guys and tell me what to you think about it

at normal driving: 14.5-14.7

~3000rpm: 12.8

4000rpm: 12.5-12.7

5000rpm: 12

6200++:11.7

Thanks!

The 14.7 at normal driving is good if you want good fuel economy...it's the stoichometric number for best use of Air and fuel, but... it's not the best number for power.

But it looks like your car is fattening up the fuel the higher it revs so that's good and the fact that it's 12.8, 12.5, 12, etc is awesome. If you can keep the AFR close to 12.5 without detonation than you're optimal for power too. You just don't want to run that lean of AFR at high revs on a boosted car if you're getting knock. Looks great to me...

Thank you very much! :)

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