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On 12 Jun 2002, at 10:19, Iamkeen@aol.com wrote: > Tried to submit this the other day, it didn't seem to show up. So here I am > trying again. I got a general knowledge sorta question here, regarding engine > RPM: A tach gives a reading based on pulses thru an SP wire... "But", I say to > myself, "the plug only fires every OTHER revolution." So is my tach telling me > distributor RPM, and the crank is spinning twice as fast? Or is the tach smart > enough to divide by 2, thus telling me how fast my actual reciprocating mass is > actually reciprocating? I think we answered this. The tach is smart enough to compensate. It reads in engine RPM. If you think about it, it's really just a matter of where you paint the numbers on the dial. - Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/