| Mechanical or electronic tach? 
Bob 
-------------------------------- 
Bob Spidell - San Jose, CA 
----- Original Message -----
From: "Tom" <ah3000me@gmail.com> 
To: "Healey Mail List" <healeys@autox.team.net> 
Sent: Thursday, August 18, 2011 7:43:55 AM 
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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