Will, it my understanding that these gauges are not much more than voltage
meters, responding to varying resistance loads at the sender end. As you are
reading high, would it be possible to wire in a resistor of the correct
size? A variable resistor could be used to determine the correct resistance.
There is a chance that this would affect the voltage at the gauge
differently, depending on the actual temperature in the engine (linear vs
non linear response, if you get my drift). But I suspect for most of the
operating temps this would be a non-issue.
Stephen
> ----------
> From: William Zehring[SMTP:zehrinwa@UMDNJ.EDU]
> Sent: Thursday, April 26, 2001 9:19 PM
> To: Hill, Stephen M EDUC:EX
> Subject: RE: temp sending unit, emerg. brake
>
> At 09:07 AM 4/26/01 -0700, you wrote:
> >All the small gauges in my 1972 2500 are TR6. The TR6 gauges read fine.
> They
> >have a narrow chrome edge on the bezel, compared to the all black bezel
> on
> >the original. When I bought the car it had a mix of TR6 and TVR gauges,
> so I
> >replaced the last originals with TR6. If I have an original temp gauge,
> are
> >you interested??
> >
> >Stephen
>
> My 71 2500 has chrome bezeled "AC" gauges, not TR6 ones.
>
> I'm working on the hypothesis that its not the gauge but the sending unit
> that is bollixed-or rather, mismatched. I've replaced what appeared to be
>
> a dead original "AC" sending unit with one for the TR6 (but my car still
> has AC gauges, not TR gauges). My AC gauge appears to work now, but its
> reading seems about 20F high. My working theory at present is that
> there's
> a mismatch between the TR6 sending unit and the AC gauge. Still... Let
> me
> keep your message and I'll get back with you on this... if it proves to
> be a gauge thing and not a sending unit thing. DANG! I love this hobby!
>
> thanks!
> Will
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