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AFR leaness cause heat ?

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Old 03-24-07, 08:59 AM
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NAN777

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AFR leaness cause heat ?

All,

something came across my mind today. i was tuning for a perfect AFR for my car.
trying to push AFR 14 to 15 on cruise and idle.

i know that the Ignition timing if too retarded, it will cause high heat, too advanced will cause knockings.

my question is....

does AFR 14 to 15 causes alot of heat ?
Old 03-24-07, 02:23 PM
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of course it does. you tune for the best peak torque then bring back some.
Old 03-24-07, 11:31 PM
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NAN777

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dev likes to hunt for my post :P

then i guess i need to bring it down to AFR 13 on high vacuum and idle...
just worried if the amount of heat is giving my O2 sensor shorter life span.
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