f150 6.2 advice needed.

[Rigo_eff1fitty]

today I was able to plug in hp tuners to my truck for the first time. currently have a canned tune by 5star sct. I am all new to this. I went thru the tune and saw lambda all diff numbers. whats a good air fuel ratio that i should be getting at wot? I was thinking of putting all the table at .92? any advice?

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[RandomEnthusiast]

That's a 13:1 afr. I'd go with a .86 or .87. To calculate lambda 14.7 or whatever stoich is for the fuel type and multiply by .88 or .92 or whatever and gives you the afr command.

[Rigo_eff1fitty]

So 13.1 is to lean?

[Rigo_eff1fitty]

.....

[RandomEnthusiast]

It's not to lean. 12.5-12.9 is where most stuff makes best power.