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Old 07-11-2006, 04:26 PM   #1
06rexwagon
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Member#: 114730
Join Date: May 2006
Chapter/Region: SWIC
Location: Albuquerque, NM
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2006 WRX Limited Wag
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Default Cobb stage 2 running lean.

I recently got my street tuner up and running and have started logging. I have a LC-1 wideband and my actual A/F ratios are considerably leaner than what is targeted in the tables. At times it is greater than 1.0 afr leaner than target. I have had zero knock with this setup, but it really makes it hard to tune without knowing that you can hit your AFR targets. I am beginning to adjust my offsets for intake calibration based on MAF voltage to see if I can get my AFR closer to target. Have any other users seen this? BTW, I have an '06 with Cobb catted TBE running stage 2 91 octane map.
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Old 07-11-2006, 06:44 PM   #2
boundy3
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WR Blue Pearl #68 STX

Default

Whats your IDC like?

Are your running lean all the time or just when your heavy into the throttle?

Where is your wideband located, in the downpipe?
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Old 07-12-2006, 12:04 AM   #3
06rexwagon
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Default

IDC is really low (it's an '06). They are usually under 60%. I think I found the answer today. In the manual for my LC-1 it mentions that cars with smog pumps will read leaner than they are actually running because the smog pump adds air to the exhaust. The '06 has a smog pump instead of a catted Up pipe.
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