Quote:
Originally Posted by bobc455
p.s. one important followup point: most OEM ECMs run their timing too far advanced IMO, and rely too heavily on the knock sensor to tweak the timing to the correct point. This system works by retarding the timing after it hears knock. This is fine in the short term, but over 100,000 miles these occasional knocks will have an accumulative affect and you could ruin your head gasket.
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Wouldn't that point support the practice of using higher octane ratings than specified?
Also, your theory sounds ok but in practice we have the longest lasting engines ever. 181,000 miles on my GMC engine, never had the heads off...should I be looking for signs of cumulative occasional knock damage?
vershun 
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