Hi Bill, I went thru this very thing with my Mk2 Sprite and my Austin
Marina, both converted to electronic tachs and Pertronix and both with
negative ground electrics. Finally figured out that some electric tachs
were manufactured to be (at least) compatible with points only and some
more recent tachs were broader based to also work with Pertronix & Crane
type ignitions. I can't explain the difference but there apparently is
a reason. Anyway, here's what I did recently when I finished resto of
my BT7 Mk2: I converted to all BJ8 gauges including the electric tach
(which needed a professional rebuild) and I used Pertronix ignition. To
prepare for this I phoned Nisonger in the NYC area and told them my
situation, i.e., negative ground, electric tach, and Pertronix, then I
shipped the tach to them. They did whatever was necessary to make the
tach compatible with all this. The tach looks great and operates
perfectly. Those tiny little numbers at the bottom of the tach face
really do mean something to those who can decipher them. I've been told
that those numbers starting with the prefix RVC would be good for my
situations but I can't attest that this is the whole story. Good Luck,
Jack
-----Original Message-----
From: owner-healeys@autox.team.net [mailto:owner-healeys@autox.team.net]
On Behalf Of Bill B
Sent: Tuesday, March 15, 2005 1:36 PM
To: Healeys healeys
Subject: Pertronix ignition and tach
Blankany advice on this problem would be appreciated:
1966 BJ8 with electronic ignition, tach stopped working, had rebuilt,
now will not work in my BJ8 (Pertronix eletronic ignition) but will work
in MG with points and condensor,( there might be a thread on this
subject in archives but did not find it.)
thanks in advance,
regards,
Bill Browning
Charlotte
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