Fubba

How does it work? How did you do it? Do you just tap into the wire coming off of the sensor to the gauge?

SanDiegoPaul

I used the sensor that came with the Spal relay kit. I grounded to the engine directly... and used the sensor to trigger BOTH fans on at 195*

In retrospect, maybe I could have/should have triggered them seperately and staged one at 195 and one at 210. But it worked so well this way, that I have never seen fit to change it. My car runs good and cool now.

The only downside is that when both fans come at the same time, all the lights in San Diego dim for a second while the power grid recovers. And the neighbors think that the airport has changed it's flightpath because of the noise.

But I'll take the noise if the stroker stays cool!

BTW be sure to upgrade your alternator output if you have not done so already. If you don't then you'll be discharging at idle (if your current alt is like mine was ~64Amp)

bashcraft

You can't use the OEM gauge sensor. You need a temperature switch.

pws69

Not true.

The Spal controller has adjustable high and low (relative) temperature settings. Theoretically, any variable resistor type sensor can be used.

Fubba

It says I can in the book. I got the harness to hook it up to the OEM sensor. I guess what I'm asking is how to do it. Do I just tap into the existing wire that is plugged in to the sensor?

71rdster

gyopp

yes, this is how i have mine and it works great.

chevymans 77

I am using my stock temp sender with the Spal PWM unit. I did just splice into the wire from the sender.

Neal

Chuck-75

I dont know how to send posts , but I have the dewitts dual fan aluminun rad. i ask this same question and got great responses.... look at Oct 26. and find my question about how to connect the elec fans....
I think this is what Yr asking?.
good luck