Date: Wed, 12 Oct 94 18:30:03 EDT
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: dcarment@ccs.carleton.ca (David Carment)
Subject: Re: cyl head temp gauge
H Steven Dolan writes:
>
>
> David,
>
> All the ones I have ever seen have a factory installed set of leads. The
> length of these leads is included in the calibration done at the factory.
> The ideal situation is not to mess with the length, as you will screw up
> the calibration. If you must, then you need a friend who works at a lab
> with the tools to do the calibration. That is, if there is a calibration
> screw on the temperature guage (some of the cheap ones I have seen are
> sealed). As a strictly hypothetical alternative, with no guarantee, (note
> I am weaseling here) you might try this:
>
> 1 install the sender (but leave the leads alone)
> 2 run the leads out of the engine compartment to a convenient place (like
> your shop bench)
> 3 attach the meter to the factory length leads while it is on the bench
> 4 idle the car for >20 min (fully warmed up)
> 5 note the temperature on the guage
> 6 stop the car, run the leads to the dash, clip'em, splice'em, whatever.
> 7 attach the meter
> 8 run the car again til fully warm
> 9 adjust the needle to the previously noted temperature
> 10 let me know whether you shortened/lengthened the leads, and what
> variation it caused. (I love a good experiment)
>
> Ideally you should recalibrate at 2 or 3 different temperature points, but
> normal operating temperature is the most important. Check your plan of
> action real careful before you start cutting tho, coz' you shouldn't have
> to. I often run into situations where I spend hours doing that I could
> have saved with a couple of minutes of thinking.
>
> H Steven Dolan
> dworkin@netcom.com
>
>
Steve: Sami's your man, he hasn't put his gauge in yet. Mine's installed
and there are bascally two leads about a 18 inches in length.From that
run two 18 gauge wires to the front gauge. As I understand it you are
saying these will effect the signal? Hmmm. Readings seem to show about
normal temps - 350C but what in your opinion would the readings be if they
were the incorrect length - too high or too low? DC
--
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David Carment
School of International Affairs
Carleton University
Ottawa, Ontario
K1S 5B6
voice - (613) 788-2600-6662
fax - (613) 788-2889
Email address: dcarment@ccs.carleton.ca
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