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What air/fuel ratio is considered too lean?

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Old 11-26-2006, 12:12 PM
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Sweet. Thanks for clearing that up. My MAF was dirty as hell. I cleaned It with electrical parts cleaner. It's alot smoother at WOT. I'm guessing the K&N oil after time got on those sensors and made It read different.
Old 11-26-2006, 03:54 PM
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Is there any way we can make a sticky about this AFR. This is a good knowledge to learn about AFR and about our cars.
Old 11-27-2006, 12:32 AM
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Originally Posted by 5550racing
Sweet. Thanks for clearing that up. My MAF was dirty as hell. I cleaned It with electrical parts cleaner. It's alot smoother at WOT. I'm guessing the K&N oil after time got on those sensors and made It read different.
I've found that if you just oil the side of the K&N that points down, it works alot better. The air flowing through will suck it deep into the fibers, and not fly off onto your MAF.

Mine was shitty as hell, cleaned it with alcohol and q-tips the other day. I almost broke one of the wires, so I wouldn't recommend that to anyone else.
Old 11-27-2006, 12:41 AM
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How can you tell on a dyno sheet if ur car is running lean or rich? This is my dyno sheet without a high pressure fan blowing into the SSRA

Old 11-27-2006, 01:03 AM
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AFR is on the bottom of the graph. Looks pretty good! You could stand to go a little bit leaner than 12.0 if you're not spraying, but it's nice and safe. Also, the SSRA will probably lean it out a bit at highway speed.



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