SRK Posted February 12, 2008 Share Posted February 12, 2008 Less than proper octane places a higher load on all parts of the rotating assembly because the ecu retards ignition timing. Piston tdc algorithm will not coincide precisely with ignition timing as per design spec of the ecu. Therefore, as piston is still rising to tdc, ignition is occuring. This increases a downward pressure as the piston is rising to tdc. ie, downward force on the crank, main bearings, and rod bearings. Silent death over time.Ferd Did you make this up as you went along, or did the folks at Area 51 send it to you? "piston tdc algorithm" Really? "silent death"? From engine ninjas? Link to comment Share on other sites More sharing options...
dcfish Posted February 12, 2008 Share Posted February 12, 2008 Less than proper octane places a higher load on all parts of the rotating assembly because the ecu retards ignition timing. Piston tdc algorithm will not coincide precisely with ignition timing as per design spec of the ecu. Therefore, as piston is still rising to tdc, ignition is occuring. This increases a downward pressure as the piston is rising to tdc. ie, downward force on the crank, main bearings, and rod bearings. Silent death over time.Ferd Did you make this up as you went along, or did the folks at Area 51 send it to you? "piston tdc algorithm" Really? "silent death"? From engine ninjas? SRK, I just had to, Too funny................. Link to comment Share on other sites More sharing options...
PilotguyPA28 Posted February 12, 2008 Share Posted February 12, 2008 Agreed! You should see the inside of an engine that has been operated incorrectly. Link to comment Share on other sites More sharing options...
eatingupblacktop Posted February 12, 2008 Share Posted February 12, 2008 This increases a Silent death over time.Ferdya, right....in my years of doing UOA, that is not the normal in sports cars to motorcycles.. Agreed! You should see the inside of an engine that has been operated incorrectly. Doing UOA is one thing. Doing inspections after teardowns is another. The analysis of one doesn't necessarily imply the results for the other. Link to comment Share on other sites More sharing options...
SKperformance Posted February 13, 2008 Share Posted February 13, 2008 This is now pointless as much as an oil debate. It is now getting diluted from basic information with some practical data to opinions. If you are interested in more information it is all over this site and the web. Link to comment Share on other sites More sharing options...
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