[Healeys] Tach way off

Bob Spidell bspidell at comcast.net
Fri Sep 9 12:47:16 MDT 2011


Sounds heat-related. I see from the schematic there's a there's a thermistor in the tach circuit; it could be post toastie. 

Just a SWAG. 

Bob 

-------------------------------- 
Bob Spidell - San Jose, CA 

----- Original Message -----
From: "Bob Johnson" <bjsbj8 at gmail.com> 
To: "Healeys" <healeys at autox.team.net> 
Sent: Friday, September 9, 2011 10:58:00 AM 
Subject: [Healeys] Tach way off 

Using my digital tach to set the tach in the car, they line up really 
well.both agree at 3500rpm and are close otherwise. However when c driving, 
according to the chart I have, at 60mph, 4th od, rpms s/b 2550. Tach reads 
5200. Anyone have any ideas. Moma rebuilt it about 5000 miles ago. Its never 
been right on, but this is ridiculous. I use gps as speedo. A really neat 
app from android market called ulysse speedometer. Even has hud display. 

Bob Johnson 
BJ8 
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