optimum fuel ratio

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Feb 9, 2006 | 06:04 PM

ltn

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From: Socal SD

optimum fuel ratio

Hey i was just wondering what the optimum fuel ratio might be on a 02 avalanche. Cause i have the predator and im looking at the o2 sensors one bank one and wondering what the numbers should be at. I read the post about the predator 101 but that was for a f-body i believe, are they about the same for trucks. thanks

Feb 9, 2006 | 06:33 PM

Wilde Racing

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From: Behind the TIG welder

stoich (I think thats how you spell it) is 14.6810:1. At WOT you want around 12:1, or close to 890mvolt on the 02's.

Feb 9, 2006 | 06:36 PM

ltn

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From: Socal SD

alright cool thanks

Feb 10, 2006 | 09:39 AM

hog

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From: Woodstock Ontario Canada

At wot around 12-12.75:1 and under 12:1 for boosted apps, always a little more rich for teh boosted apps to supress detonation.

I noticed a nice gain in power when I went from the stock 12:1 PE(power enrichment) to around 12.75:1. Pulled MUCH better at WOT, definitley noticeable SOTP.
You dont want to go TOO lean though, esp. without scanning and widebandO2 equipement.

peace
Hog