[Healeys] Smiths Tach Conversion

[Bob Spidell]

A data point: 

I have a pre-2001 Smiths tach with positive-ground Pertronix ignition on my BJ8. I calibrated the tach against a Craftsmen dwell/tach, and double-checked RPM and MPH with my 3.54 rearend and 185/70R15 tires. The tach is absolutely dead-nuts on and rock solid at all engine speeds (I did have to reverse the inductive pickup loop on the back, not surprisingly). 

I've often wished I could get an electronic speedometer. 

Bob 

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Bob Spidell - San Jose, CA 

----- Original Message -----
From: warthodson at aol.com 
To: healeys at autox.team.net 
Sent: Wednesday, July 27, 2011 8:00:59 AM 
Subject: [Healeys] Smiths Tach Conversion 

Recently, we have been told by Nisonger that that Smiths electronic tachs may 
malfunction when connected to a distributor using a Pertronix ignition. 
...