[TR] TR4A overheating update

[Geo Hahn]

On a TR3A the middle of the gauge was 1850.

On a TR4 it was 700C which is 1580 but I have long thought that was wrong,
possibly someone doing the math and getting the parens in the wrong place
--  5/9 * (185 - 32) = 85 whereas (5/9 * 185) - 32 = 70.  The first
equation is correct of course.

Of course, the problem could be in the sender rather than the gauge --
there were several similar looking but quite different senders available.

Geo




On Fri, Nov 8, 2013 at 5:22 PM, Dave Connitt <dconnitt at fuse.net> wrote:

> I think I may have discovered something interesting while tracing down my
> overheating TR4A problem. I did a calibration test of my temperature gauge
> and
> discovered that if I immerse my temperature gauge sensor in 150 degree
> water,
> the needle stops about 1/4" or less from the "H"? That can't be right??
> Does
> anybody have any suggestions for what a "centered" temperature gauge needle
> would represent in degrees F? Or, should I shoot for 212 on the "H"?
> Anyway, I think I am on to something here. The engine never really
> "sounded "
> hot if you know what I mean, no leaking hoses, no wierd whistling sounds..
> Man, I hope this is it??
> Anyway, let me know what I should adjust the gauge to read.
> Thanks,
> Dave Connitt
>
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