<VV> Thermister Swap?
RAMBLERPAT at aol.com
RAMBLERPAT at aol.com
Fri Aug 29 22:06:01 EDT 2014
To all, I have discovered that the connecting shaft or tip on my
thermister spins freely. I cannot tighten the small nut on the wire. In addition, I
have no reading at all on the gauge and I am unable to gain any resistance
when I do an Ohm test on the unit. I am thinking that whatever wiring the
tip is connected to beneath the porcelain has broken resulting in a failed
thermister.
Now, I have located used original AC ones (tested) for around $80, and
there is a NOS thermister on eBay now for $400. Interestingly, as I researched
even further I have found info on a Rochester 3080-38 TEMPERATURE PROBE
referenced from a FlyCorvair.com article on head temps. In the aircraft
catalog mentioned in the article their Rochester thermister/temp probe has a
temp rating from 250F - 550F degrees, and it has 3/8 24 thread size, the same
as the one I recovered from my Spyder. Also, it appears DC because it is
used in light aircraft perhaps Corvair powered too. Cost of the new Rochester
temperature probe is $80.
Question: Will this thermister work in my Spyder, is it compatible with
the factory gauge and CHT opening on the head?
(I do not have the measurements of the Rochester temp probe but it looks
very close to our AC unit from the picture in the catalog)
Patrick
64 Spyder Coupe
Metro Detroit, MI
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