<VV> Thermisters

[NicolCS at aol.com]

<snip>
If there is a problem with finding temp. sending units,  has anyone tried the 
cylinder head temp. sensing unit from a Type 3  (Squareback or Fastback) 
Volkswagen? Don't know how the thing shows up under  calibration but the 
curve 
seems right or similar to that on newer American  OR Bosch Water temp. 
sensors. 
It would have to be rethreaded to fit SAE  threads. Scotty <unsnip>
 
Well Scotty, I don't know if anyone has taken a look at that one or not  
but...  My '65 happens to be a Corsa with a regular thermister  and dash gauge and 
it also has a Datsun/Bosch EFI that uses a VW head  temperature sender!  I 
went out and measured the resistance of the Bosch  sending unit at ambient (80F) 
and it was 2400 ohms.  Hmm, that's pretty  close to what an AC unit would be. 
 I ran the engine for a bit and the  resistance was down to 600 ohms - the 
resistance was moving in the right  direction.  It won't take much work at all 
to install an A/B switch and  compare gauge readings between these two sending 
units.  I don't know when  I'll be able to get to it, but I seem to have an 
ideal setup right in  hand!
Craig Nicol