Reply to thread

Click here to become an Official Member of BMW Club Malaysia Download Form

Message: <blockquote data-quote="turbology" data-source="post: 380299" data-attributes="member: 10223">I thought you are not suppose to stay at constant RPM when running in engine ?Refer back to my quote, a 9.0:1 engine with bad tune are as bad, or worse, then a 11.0:1 car. Running a lower CR, with give you more BUFFER for error, but is not going to solve the knock. When the engine detect knock, it will retard. But when you are the lower map of "retard", and still having knock, you are deadend.With your constant knocking case, I strong believe the tune is off. Or, the air intake temperature is very high (before the turbo). Or the intercooler is not doing enough.Does running Toluene mix help ? How about spray some water, or even ICE, on intercooler to see if knock goes away? Previous youtube video, i remember that brand is a Wideband O2. Just to be sure, is it ?You can just throw away the narrowband O2 sensor.Besides having a AFR as a guage for "safety measure", have you consider the EGT (exhaust gas temperature) guage ? Is part of the tunning "factor" as well, besides the Lambha O2 sensor.The spark plugs tip looks just fine, matching with the reading of the AFR. If is running really lean, the tips will be very clean with rainbow color.For what I know, and came across, running the oil cooler will help but is not going to solve your problem.Your piston failure is definately detonation, and my theory, the root cause is heat.  Or the particular gas station is not honest about thier V-power.Cheers.p/s: psss... check your PM <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /></blockquote>

Verification