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      10-10-2010, 06:24 PM   #456
ZTUNER
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Drives: 91 Z32TT, 2000 I30, 335i
Join Date: Apr 2008
Location: Sarasota

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Quote:
Originally Posted by shiv@vishnu View Post
oh god. Stop it. We limit the amount of retard that a customer can induce. Even at the maximum, it's far less than the DME would reactively induce in a full boost/low octane condition. And you don't see anyone with burned exhaust valves with these engines. Only broken ring lands from knock.
If i am not midtaken enriata said at his valves were "loose" when the heads were removed. Not sure if he was refering to guides or valve seats. Either way guides or valve seats at 70 k miles is not a good sign. Valves not seating correctly is a sign of either too much carbon or burnt valves maybe due to high egts. Do you know what material the valves are made of in these motors ?

Harry

Ps i am not saying jb or proced is better etc etc. For the record i prefer flashes
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