Re: [T3] tach reading/RPM question

[Jim Adney <jadney@vwtype3.org>]

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

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