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My comments below. Toby Erkson air_cooled_nut@pobox.com <-- Please use this address for email '72 VW Squareback 1.6L bored and stroked to 2.0L, Berg five-speed '75 Porsche 914 1.8L, ORPCA member Portland, Oregon, http://www.pobox.com/~toby_erkson/ >-----Original Message----- >> Higher compression engines, like my engine, that are at >operating temp or >> higher > >I assume that here you mean "normal operating temp or overheating" Correct. >I can't help wondering if what you are experiencing is a slightly >different thing: preignition. This may be nitpicking, but >preignition is the ignition of the mixture by something hot in the >combustion chamber. It is not the same as detonation (ping, knock, >etc) and I don't think higher octane gas will help it. I am not >particular sure about this, but I think the symptoms, and the engine >damage that can result, are similar. Possible. Yes, preignition is different and octane won't make a bit o' difference. Not good for the engine and a definite loss of power. ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe