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Running a little rich, should I cut fuel or add timing?

Old 09-23-2005, 06:32 AM
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Default Running a little rich, should I cut fuel or add timing?

I was seeing what people recommend for a car that is running with O2 values in the 0.925 range. I was thinking about taking out fuel till my O2's where about 0.900 and then adding in timing until I got KR and then back off the timing.

Would I make more power by staying richer, maybe in the 0.915 range and just use more timing until I get KR and then back off the timing?

Thanks!
Old 09-24-2005, 12:25 AM
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You can't trust the factory 02# they are not accurate. You need to check it with a wideband 02 sensor.
Old 09-24-2005, 04:47 AM
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Originally Posted by ldickson
You can't trust the factory 02# they are not accurate. You need to check it with a wideband 02 sensor.


Other than that, you have a great question. Do you add timing or cut fuel. I think you would need a dyno to complement your WB to answer that one.
Old 09-24-2005, 06:41 AM
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You have to go with a wideband... I treid to tune from the stock O2's and ran in circles. Soooooooooo much easier with the wideband. Get the LC-1 it is cheap and easy to setup.
Old 09-24-2005, 10:59 AM
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I always have thought that you get your fueling right then mess w/ timing for max power.
Old 09-24-2005, 11:37 AM
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Originally Posted by 2001 Pewter WS6
You have to go with a wideband... I treid to tune from the stock O2's and ran in circles. Soooooooooo much easier with the wideband. Get the LC-1 it is cheap and easy to setup.
How much did it run you??? I'm thinking of doing this because I'm running in circles now.


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