On an MGB the wire that is used for the inductive loop is the white from the
ignition switch to the coil. It's all series circuitry so it doesn't make
much difference, 'cept the white is a damn sight closer to the tach than the
wire that goes from the coil to the dizzy.
PaulH.
-----Original Message-----
From: Rocky Frisco <rock@rocky-frisco.com>
To: mgs@autox.team.net <mgs@autox.team.net>
Cc: mini-list@autox.team.net <mini-list@autox.team.net>
Date: 11 October 1999 05:47
Subject: Tacho question answered
>As I have kindly been advised by a number of MG-Listers, apparently this
>sort of tach senses current rather than voltage pulses, so instead of
>bridging between ground and the distributor-to-coil connection, like all
>of the other tachs I have, it passes that connection through the unit.
>If it's faithful to the usual protocols, the energy source should be the
>female connector, so I suspect it will be: wire that normally goes from
>the distributor to the coil going to the male connector on the tach
>instead, then a wire from the female connector on the tach to the coil.
>
>A million thanks to everybody that responded on both lists.
>
>Since the energy has to travel a lot further to get from the diz to the
>coil, I suspect really heavy, low-resistance wire is best, so I'm
>planning to use the same stuff I used for the ammeter connections.
>
>Will report the results tomorrow.
>
>I took The Luggage around the block today as his first official "feet
>traveled." I have another few days work before he is really road-ready
>(can't find the %^$#$@# safety-belt straps, etc. etc.)
>
>When I put my foot down briefly, it literally snapped my head back; what
>a little beast!!
>
>-Rock
>--
>Rocky, JJ Cale Band & Pratchett Books: http://www.rocky-frisco.com
>Rocky's Mini Cooper Page: http://www.geocities.com/MotorCity/6437/
>Mini Books: http://www.geocities.com/MotorCity/6437/rockboox.html
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