71stingraybigblock

I was thinking of running another thermostat switch into the intake manifold. Does anyone have a part # for another thermostat switch or suggestions on doing this?

neverendingproject

i don't know what spal uses , but i run a 195* normally open temp switch for my fans. at 195* it closes , grounding the control side of my fan relay. opens back up at 185.
you can get these switches at any commercial vehicle parts store( fleetpride, truck pro).

Vette-4-Life

I use flex-a-lites VSC on my dual 11" spals. Allows you to adjust the temp that the fans turn on at. When they initially turn on they only run at 60% of speed, reducing the 'wham' factor to your charging system. If temp continues to rise then it kicks it up to 100% fan speed. It will also run the fans for 30 seconds after the car is off if temp is high. I set mine at 200 and it works great.

Smokehouse69

Zwede has designed a dual switch, multi speed setup for his Spal's, I had a copy of the schematic a couple of years ago, but it has dissapeared in all my junk.
I think Will Shepard has used it on his car also. Maybe, Zwede will see this and kindly post his diagram. :D

flynhi

Zwede's design works great. Both fans run at low speed off the low temp sensor then run at high speed when the high temp sensor kicks in. Saves wear and tear on fans and uses condierably fewer amps almost all the time.
I use a 160 water thermostat and a 185 and 195 temp sensor.
Try it - you'll like it.

71stingraybigblock

Zwede's setup sounds great. How can I get details on it?

Enad

Steve,
I'm not sure what Zwede did but I cannot imagine there are too many ways to do this. I use two switches. Check the link below. You can skip the nuisance text at the top and hit the link at the bottom for a wiring diagram. I really like they way the systems works :cool:
http://members.surfbest.net/danespace@surfbest.net/vette/radiator/index.htm

Dane

Sigforty

You could always try Dewitts they sell the Spal fans and equipment. I recently purchased another switch from him since the 185 was running all the time I went with a 195 switch. I think it was something like 20 dollars for the switch.

Smokehouse69

Mark, I used a slightly different approach. I went with a 170 degree thermostat, instead of the 195 degree switch. I'd still like to go to the dual speed setup like Zwede's. The diagram referred to in a previous post looks vaguely familiar, and is probably a virtual duplicate of the Zwede designed circuit. Maybe I'll go pickup another relay and try and duplicate it.

flynhi

The link as posted by ENAD appears to be functionally equivalent to the Zwede setup on my 71.