[Healeys] Tach heat sensitive?

[Niels Bengaard]

Dont know if its a common problem, but I have tested three different tachs 
in my BJ8 and they all have the problem with showing more and more the 
longer you drive.
>From the beginning they show around correct rpm, after a while to much. 
Always thought it had something to do with the electronics in the tach being 
cold or hot.

Niels

-----Oprindelig meddelelse----- 
From: Tom
Sent: Thursday, August 18, 2011 4:43 PM
To: Healey Mail List
Subject: [Healeys] Tach heat sensitive?

I've noticed that when I drive to work in the morning when it's cool
(50-60F), my tach shows about 2500 RPM at 65 MPH.  When I return home at
night when it's warm (80+ F), my tach shows about 3000 RPM at 65 MPH.

Any ideas about what's going on?

thanks,

Tom
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