[Spridgets] Cooling fan thoughts

[HealeyRick]

Chuck,

How about using one of these adjustable controls with a probe that inserts
between the radiator fins:
https://www.summitracing.com/parts/der-16759/overview/  I use one on my
Nasty Boy, works good.

Rick Neville

On Sat, Dec 14, 2019 at 6:00 PM crusaderchuck55--- via Spridgets <
spridgets at autox.team.net> wrote:

> First , thank everyone for positive input on this.
> I am installing the temp. gauge sender in the cylinder head.
> Years ago I had a 1940 Chevy coupe street rod.   It had a Flexilite brand
> adjustable temperature sensor to turn on the cooling fan.  It's sensor bulb
> went into a rubber arc'd piece that allowed the sensor to be placed into
> coolant where a radiator hose slpped onto a hose nipple.   I had it located
> at the thermostat housing.   I'm leaning towards something like that.
>  Most modern temperature sensors are designed for 195° as an initial "on"
> temperature.   Also most I could find at the local junk yard are going to
> be very modern and the bung they screw into would be a plastic radiator.
>  I'm using a stock 1275 cross flow radiator.  If I had a decent temp switch
> ( 180° or lower?) And a copper/ brass bun g , I could solder it into the
> radiator end tank.  Or possibly into the lower coolant cross tube .   Yes I
> know the hotter coolant is on top not on the bottom.   Possibly on top of
> the thermostat housing , although the rear of head heater tap is going to
> be a bypass up to the thermostat housing which may make that casting a bit
> "busy" for a thermostatic switch mount.  Those cast iron cross flow
> thermostat housings are awfully heavy and rather thin in the domed area
> over the thermostat.   I'd use an alloy one of I had one that pointed the
> right way....  As of this writing I'm committed to using the cast iron one
> and brazing a 90° fitting on top for the coolant bypass back to the heater
> port on the head.  I'd love to do it with AN fittings and cool braided hose
> , considering the "we tight" budget , that's not happening.
> My radiator guy is 1.5 hours away and he might have a copper or brass bung
> ( he mu st have 500+ junk radiator that he uses for pieces to modify
> radiators for customers) but too far to drive on a gamble.  I could shop
> old foreign cars in our local pick-N-pull ( our "breakers") and test them
> for what temperature they make contact to close a circut.  Somewhere I
> remember the old VW's ( rabbit & Scirocco days) had pretty reliable sending
> units.   I need to do some research looking into early electric cooling fan
> system operating temperatures or pressures ( higher pressure systems
> traditionally were higher temperature systems from past experiences).
> More to come as I get more input.
> Chuck
> *Sent from my LG Mobile*
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