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Air/Fuel ratio question... best ratio

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Old Mar 28, 2002 | 02:41 PM
  #1  
ORAY777's Avatar
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From: San Francisco Bay Area
Air/Fuel ratio question... best ratio

Whats the best air/fuel ratio at WOT? Is there a way to check this value while driving at wide-open throttle. I know they sale air/fuel ratio gauges. Anyone have any insight to this. Thanks.
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Old Mar 28, 2002 | 02:47 PM
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rx7speed's Avatar
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From: Caldwell,ID
Car: 2005 BMW 545i
Engine: 4.4L N62B44
Transmission: 6spd auto
Axle/Gears: Rotating
wish it where that easy

what a/f ratio you want to run depends on what your setup is
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Old Mar 28, 2002 | 03:57 PM
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Z28DJP1987's Avatar
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From: Ohio, USA
I am running a 13.1 a/f ratio @ 41/42 fuel pressure on my 350, if this helps. Results from a Dyno Run.
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Old Mar 28, 2002 | 06:55 PM
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rx7speed's Avatar
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From: Caldwell,ID
Car: 2005 BMW 545i
Engine: 4.4L N62B44
Transmission: 6spd auto
Axle/Gears: Rotating
the only way to tell for sure what your best a/f is would be to use a dyno

cause some setups like to have a richer mixture while others need something a little bit lean
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Old Mar 28, 2002 | 10:26 PM
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From: chicago
plugs

why dont u check the plugs it`s way cheaper than chasis dyno.For example make a run down the quarter mile ,then stop at the pits pull some sparkplugs.check the color ,dark =rich white=lean ,u want light brownish color(not too light not too dark).
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