Air/ Fuel Ratio

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07-18-2009, 08:09 PM

nickel417

2nd Gear Member

Thread Starter

Join Date: Aug 2008

Location: Kentucky

Posts: 278

Air/ Fuel Ratio

What should my air/fuel ratio be under WOT? Idle? and Cruising?

My mods are in signature

07-18-2009, 08:35 PM

jvog

5th Gear Member

Join Date: Mar 2008

Location: PA

Posts: 2,825

idle/cruise should be around 14.7 I believe, as for WOT I'm not sure what it should be n/a

07-18-2009, 08:51 PM

nickel417

2nd Gear Member

Thread Starter

Join Date: Aug 2008

Location: Kentucky

Posts: 278

thanks....now anyone for n/a air/fuel?

07-18-2009, 09:08 PM

cliffyk

TECH SAVANT

Join Date: Dec 2006

Location: Saint Augustine, FL

Posts: 10,938

The "classic" n/a WOT AFR is 13.0:1, however here in Florida I head for 12.5:1 as it lets me run a bit more spark advance in the heat. My winter, or what passes for winter here, tune is closer to 13:1.

07-18-2009, 10:57 PM

teej281

4.6L Section Moderator

Join Date: Nov 2007

Location: South Central PA

Posts: 10,286

I run 12.8:1. I think 13:1 is a little bit too lean for my tastes. Im not all out race car. Im looking for more reliable quick street car. But definitly no higher than 13:1.