Anybody using an electric fan ?

[Chevy nutcase]

Originally Posted by Arne

I'm planning to add a dedicated temp switch for this, will turn on at 185° and off at 170°. I don't think the existing sender would work well for this.

I'd like to know which sending unit you plan on using and how to wire this all up

[Accelo]

Originally Posted by Chevy nutcase

For my 66 c10 and 250 6cyl I'd like to know if this hhr fan can be used with my existing temp sensor to turn on and off as needed and not needing me to flip a toggle

You will need a relay to make it automatic.
https://www.amazon.com/Thermostat-Te...A1ZOVZPOSHV3EK
Fan Thermostat Temperature Switch 3/8" 185 Degree On 170 Degree Off Electric Cooling Engine Fan Thermostat for 10" 12" 14" 16" Fan.

Others sell this same type switch with different ratings. Some radiators come with a tapped hole for this switch. You can use them in the block also but may not shut off depending on your thermostat.

The switch grounds the relay to activate it.
Cheers

[Accelo]

Diagram

[theastronaut]

Originally Posted by Arne

Is the HHR fan a 2-speed?

Single speed.

Originally Posted by Chevy nutcase

For my 66 c10 and 250 6cyl I'd like to know if this hhr fan can be used with my existing temp sensor to turn on and off as needed and not needing me to flip a toggle

The existing switch is either an on/off for the warning light style gauge cluster; if you use that style for the fan it'll only come on when the engine is too hot. The other style for a temp gauge wouldn't work either.


This is what you'll want, it's adjustable to use with any temp thermostat and the temp probe goes in the radiator fin so you don't have to drain coolant and add a thread in sending unit in the engine. Keeps all the wiring on the radiator support and off the engine. Comes with a relay and fuse too.

https://www.summitracing.com/parts/flx-121280

[tresguey]

Originally Posted by kens65fb

Anybody using an electric fan, if so, any recommendations?

Pro tip…when looking for electric fans do not look at advertised CFM, look at the amp draw. Manufactures are known to fluff up their CFM numbers just to get sales, they do not mess around with the amp draw ratings because that is easy to verify and it would be dangerous when you spec your wiring.

Long story short, for every amp a fan pulls that is about equivalent to 100 CFM.

[LVPhotos]

I posted this control earlier in thread. It contains a built-in relay

https://www.speedwaymotors.com/Speed...uges,2356.html