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Old 11-21-2005, 06:43 PM   #7
Scooby Specialist
Member#: 56468
Join Date: Mar 2004
Chapter/Region: NWIC
Location: Seattle, WA
04 Improved STI
Dirty White


I've got a theory for you, mind you it's really out there.

Putting in a colder plug transferred more heat to the heads (valves in particular), the heated valves expanded more (lengthened) and closed the lash of the bucket-camshaft interface. Tighter lash meant quieter buckets and less false knock.

Please attack at will.
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