Re: [T3] how's it work?

[Ben Doughney <ben_d@clear.net.nz>]

on 10/6/02 2:21 AM, Shad Laws at shad@aircooled.net wrote:

> The distributor's points fire with every spark plug firing.  Directly, the
> tachometer reads the frequency of the squarewave the points make.  So, for a
> 4-cyl. engine, that's twice per revolution.  For a 6-cyl, it's three times,
> 8-cyl it's four times, etc.  Every tachometer must be calibrated for the
> number of cylinders the engine has, essentially to "divide" this number by
> 2, 3, 4, etc. to get the true crank rpm.
On my digital tach, it has an inductive pick up that goes around a SP wire,
but only has one position for tach (on the mode switch), but it will work
with 4, 5, 6 or 8 cylinders. I have always wondered how it works out how
many cylinders are there?

Ben Doughney

'75 1200L
'63 1200 - Ringo

http://members.tripod.com/~superkafer/ 


------------------------------------------------
To unsubscribe, E-mail to: <type3-off@vwtype3.org>
For more help, see http://vwtype3.org/list/