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Old 06-22-2010, 08:39 PM   #39 (permalink)
rmay635703
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Join Date: Jun 2008
Location: Somewhere in WI
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Silver - '10 Chevy Cobalt XFE
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Quote:
Originally Posted by mpgx2 View Post
Phantom, you have an amazing wealth of information.

To run mine lean, I will replace the O2 sensor with an EGT
sensor and then work on leaning out way beyond the 20-30%
boundaries set by the ECU.

My target is to even try down in the vapour range at about
10%. Eventually...
If you get too lean and it runs you tend to get detonation, although it may not make tons of heat it will blast little pockets in your pistons
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