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      08-26-2011, 01:50 PM   #161
Beedub
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Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

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Quote:
Originally Posted by iPhoneEngineer View Post
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.
ask ess to explain why the stock plugs work so well ;-) they'll give you the answer you seek :-)

the stock plugs are a high end item and work perfectly in this application, i genuinely see no reason to change them out, as said ess have no reason to not supply a new plug and charge for it if i was needed.

heat soak is heat soak, FI cars suffer from it, the new 1m really suffers from it.... a warm charge will simply cause less power, thats why on cooler days you can really feel the power difference.

id love to know the difference in AIT from a complete stock car at the intake mani and our intercooled cars at the mani.....

here in cold ass england i dont see heatsoak often, perfect FI climate.

byron
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