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[Healeys] Tach heat sensitive?

Subject: [Healeys] Tach heat sensitive?
From: warthodson at aol.com (warthodson at aol.com)
Date: Thu, 18 Aug 2011 18:33:10 -0400 (EDT)
References: <CANQM1PJQJ9t3f+zRZJDwP6hLD17LywTXk82UfzyQYGuHQ3UD2w@mail.gmail.com> <2067C9DB7D904692B9B5FC73AEB7182B@NIB>
My BJ8 tach responds the opposite.
On a long drive home from Conclave I lost 250RPM from the morning to late
afternoon at a constant 70 MPH, in 4th overdrive, with the lights off, as
measured by GPS, in Kansas.
Gary Hodson





-----Original Message-----
From: Niels Bengaard <bengaard at 850r.dk>
To: Healey Mail List <healeys at autox.team.net>
Sent: Thu, Aug 18, 2011 12:25 pm
Subject: Re: [Heal] Tach heat sensitive?


Dont know if its a common problem, but I have tested three different tachs
n my BJ8 and they all have the problem with showing more and more the
onger you drive.
rom the beginning they show around correct rpm, after a while to much.
lways thought it had something to do with the electronics in the tach being
old or hot.
Niels
-----Oprindelig meddelelse-----
rom: Tom
ent: Thursday, August 18, 2011 4:43 PM
o: Healey Mail List
ubject: [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
ight 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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