Just received eMail from a foreign fan. Apparently Message #9338 wasn't clear enough. Let me try one more time: Direct quote from Message #9338: "Have seen in print (book -- Robert Sikorsky's I believe. Will look it up at home) that there's something like 5 degrees between optimum ignition and point at which valves start to clatter. Advancing spark towards bottom of that window actually LOWERS HP." Please note -- N-O-W-H-E-R-E in that quote do I state that the 5 degree timing window is between TDC and 5 degrees BTDC. In fact I rather explicity state that the window is between "optimum ignition point" and another point of greater advance (which Robert Sikorsky thinks is 5 more degrees. Ford apparently thinks it is 4 degrees based on "+/- 2 degrees" printed on engine comparment sticker). That means (please try to follow me here): There is an optimum time to fire spark plugs in compression stroke. This is where ignition should be timed. But the engine will still run acceptably with ignition advanced SOMEWHAT before that point. Power is reduced, but less pollution is created. American car companies noticed this in 1970's and proceded to do just that -- advance specified ignition time from optimum point towards point at which performance becomes unacceptable (knocking). Don't blame me -- I didn't dream this stuff up. If I could have my way we'd all be driving high compression blocks with no emissions devices, no onboard electronics, and no problems. Bill Robertson #5939 To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx _____ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/DMCForum/ * To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx <mailto:DMCForum-unsubscribe@xxxxxxxxxxxxxxx?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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