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Good AFR's for power enrichment

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Old Mar 4, 2004 | 11:14 PM
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ULTM8Z's Avatar
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Good AFR's for power enrichment

I'm curious to know what you experienced guys would recommend for AFR's on my engine.

Here's an image from my spreadsheet. I built it so can input my table values from CATS and have it compute the resultant AFR. 92°C is close to my normal operating temperature. You can see my current value for %chg to AFR vs coolant in the upper left. The other table is %chg vs MAP. The table on the right is the resultant AFR.

Do these values look reasonable to you? The car runs pretty good right now, but without a dyno it's difficult to know if I'm on the money.
Attached Thumbnails Good AFR's for power enrichment-afrs.jpg  
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Old Mar 5, 2004 | 12:33 AM
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From: La Porte, IN
Car: 1987 Monte Carlo SS
Engine: L98
Transmission: 200-4R
Axle/Gears: 7.625 10 bolt/3.73s
Are you running 8d? That looks like an open loop table, not PE.
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Old Mar 5, 2004 | 06:18 AM
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From: Maryland
Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
I would very much recommend a Wide Band kit along with Mike Davis' modifications to allow you to view the true AFR in a scan program. It is absolutely invaluable. The calculated numbers are just that ... calculated. They mean nothing.

Tim
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Old Mar 5, 2004 | 06:19 AM
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From: Maryland
Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
Originally posted by PLANT PROTECTION
Are you running 8d? That looks like an open loop table, not PE.
Agreed. That doesn't look like the power enrichment table ... or, did you mean startup enrichment???

Tim
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Old Mar 5, 2004 | 08:22 AM
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Oops, sorry guys. Posted the wrong table. I had the open loop and power enrichment spreadsheets open at the same time and I must have grabbed the wrong one.

I'll have to repost the correct table tonight when I get home.

And yes it is an $8d.
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