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Lets talk abour A/F ratio

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Old Oct 18, 2009 | 04:21 AM
  #1  
1990hondahf's Avatar
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Joined: Jan 2008
Posts: 250
From: Florida
Lets talk abour A/F ratio

What are you guys running for you A/F ratios at:
  1. idle
  2. light boost
  3. full boost
 

Last edited by 1990hondahf; Jun 27, 2010 at 11:25 AM.
Old Oct 18, 2009 | 08:00 AM
  #2  
dewthedew's Avatar
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From: HollyHOOD, fl
13-15.x idle
10-17partial throttle
13 light boost
12.9 wot and now 11/10 in 3rd between 5-6500

I need a tune!I'll post after tune numbers lol
 
Old Oct 19, 2009 | 11:58 AM
  #3  
explosivpotato's Avatar
Joined: Feb 2007
Posts: 548
From: Flint, MI
Your AF ratio should depend on manifold pressure more than anything else. The fit uses a wideband, and the FIC can control it very well, so your AF ratios should be dead nuts as follows:

Idle / cruising (anything below 5-7" of vacuum) - 14.7-15.0 (I have mine running 15.0 for a hair better gas mileage)
Transition to boost (anything between 5" and 0) - AFR should smoothly ramp down to ~13 - 13.5 at 0 vacuum
In boost (anything above 1psi) - you should be running in the low to mid 12's.

Ignition is another story, I'm running a .68 degree/lb of boost step retard, with additional timing pulled in low RPM boost as this area tends to be a tricky one.
 
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