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Re: Tachometer erratic

To: "spitfires@autox.team" <spitfires@autox.team.net>
Subject: Re: Tachometer erratic
From: "Mike Ross" <mikeross@Prodigy.net>
Date: Sat, 29 Jul 2000 11:06:11 -0400
Trevor,

I hooked up the three GT6 tachs the same way.  I even put an "S" curve in
the tach cable with the Spitfire tach and it still performed perfectly.

Mike Ross
'67 Spitfire (soon to be a Spit 6)
'66 Spitfire
'69 GT6 (parts car)
'70 GT6
----- Original Message -----
From: "Trevor Boicey" <tboicey@brit.ca>
To: "Mike Ross" <mikeross@Prodigy.net>
Cc: "spitfires@autox.team" <spitfires@autox.team.net>
Sent: Saturday, July 29, 2000 1:42 AM
Subject: Re: Tachometer erratic


> Mike Ross wrote:
> >
> > Joe,
> >
> > As it turns out it is an amazing coincidence.  I have three GT6
tachometers
> > and all three were bouncing all over the place.  I pulled the
distributor
> > and removed the drive gear.  Tachometer drive gear was pristine.  I have
two
> > Spitfires in different stages of restoration, so I removed one of their
> > tachometers and hooked it up to the GT6 cable under the bonnet.  Guess
> > what?.......it worked fine.
> >
> > All three GT6 tachometers must need to be repaired/calibrated.   Have
you
> > ever had this done?
>
>   Are you sure it's not the usual symptom, which is too much runout
> in the tachometer cable?
>
>   Having the spare tach hooked up "under the bonnet" is not a fair
> test, because without the corners and twists of the cable you
> won't see the trembling.
>
> --
> Trevor Boicey, P. Eng.
> Ottawa, Canada, tboicey@brit.ca
> ICQ #17432933 http://www.brit.ca/~tboicey/
> "At this rate in 30 years I can work my way up to idiot savant" - Ajax


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