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      08-26-2011, 12:16 PM   #160
iPhoneEngineer
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Drives: 2007 BMW Z4 M Coupe
Join Date: Jun 2010
Location: La Honda, CA

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So, question: what is it about excess heat that causes such a dramatic power loss, one that seems greater than the mere density loss of the charge?

Could it be that our stock heat range spark plugs are getting too hot and actually causing pre-ignition, forcing the DME to pull timing? This is actually a likely scenario for using stock heat range plugs with a S/C setup, from what I've read.

Nonetheless, ESS recommends nothing but stock plugs.
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