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Old 05-09-2000, 11:32 AM   #3
edekker
Scooby Newbie
 
Member#: 143
Join Date: Aug 1999
Location: Kanata, ON, Canada
Vehicle:
1999 Impreza 2.5RS
Supercharged - and STOLEN

Post

Tim Prudence,

I'm very familiar with the detonation sounds. I can make them at will. They do not sound like knocking or like marbles in a tin can. Light det make crackling sounds. Serious det sounds like tiny firecrackers going off in rapid succession which gets louder if you don't let off on the throttle. Don't let it continue at this level. The engine's thermal efficiency drops dramatically causing a condition akin to thermal runaway. Left unchecked, the inevitable melting of pistons|valves|sparkplugs will occur guaranteed.

Ed.
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