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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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