Where do you get a 165C thermo switch and what made you decide on that
temp? TSI has an electric fan for $60 but no thermo switch.
Mike
Ptegler wrote:
>
> The THEORY of operation..... I do believe it was a way
> for Triumph to sell replacement radiators.
> That 'friction clutch' fan is dangerous as well as being a
> disaster waiting to happen.
>
> The speed variations of the air passing over the fan and the fan
> blade speed is what sucks engine horsepower.
> At some speeds you want the blades moving enough air to cool the engine
> but at highway speeds the fan isn't moving as much air as can be forced
> through simply by moving at 60 mph down the highway.
>
> The idea of the clutch is to change the range of speeds at which the fan
> is actually the item moving the air.
>
> The problem is they love to simply 'pop off' and go dancing around in your
> engine compartment and or rip up your radiator cores.
> It's nothing more than a friction fit ring that wedges in between the fan
> and a groove on the pump pulley.
>
> My choice? Pull (pry) the fan off. Add a thermostat and an electric fan.
> Check out the photos about the middle of the page at
> http://www.teglerizer.com/triumphstuff/v_engine.htm
>
> Paul Tegler wizardz@toad.net http://www.teglerizer.com (new layout)
> OBie - '73 BGT - daily driver
> Punkin' - '78 Spitfire - corner ripping screamer
> Lil' Greenee - '73 RWA Midget - lady killer
>
> -----Original Message-----
> From: Mike Ginter <mginter@concentric.net>
> To: Spit list <spitfires@autox.team.net>
> Date: Wednesday, May 03, 2000 12:45 AM
> Subject: Fan Clutch
>
> Could someone please explain to me the theory of operation of the
> Spitfire fan clutch? I read somewhere that it is supposed to decrease
> the fan speed as engine speed increases. Is this correct? Is it a
> straight viscous coupling or is it supposed to be thermostatic? Mine
> spins when the car is not running albeit not easily, and operates at
> full speed all the time and is quite loud. Can anyone recount first
> hand experience with their own unit as to the speed of the fan in
> relation to engine speed?
>
> Mike
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