Old Air electric fan kit

[MikeB]

Just received this in an e-mail. I've never shopped for electric cooling fans, but at $345 to $395, this looks like a good deal to me.

https://www.oldairproducts.com/produ...hroud-assembly

[weq92f]

.

Those fans retail for 172/each...

https://www.summitracing.com/parts/s...+5ba29d876c1e3

The shroud isn't something I could find individually for sale but those two fans would cost you 344. Add the cost of a wiring harness, relays and thermostat.

I'd say that is a fair deal.

-Kevin

[pjmoreland]

I installed one of those fans a couple of weeks ago. It bolted up nicely, and it looks good. My only gripe is that the foam strips they give you to install between the radiator and the top and bottom edges of the fan shroud don't look so great.

I went with the version that doesn't come with the controls. The female half of the electrical connectors were not included, but fortunately they are the same style of connector that is used in the OE under-dash harness for the dome light connection, and I had a couple extras of those. I have my Holley Sniper controlling the two fans.

I have yet to see if these fans will keep up in the heat of Summer.

http://67-72chevytrucks.com/vboard/s...d.php?t=851122

[PbFut]

Given you do not remove these fans very often, I would recomend avoiding the plugs and hard wire direct to the relays and then main splice down by the voltage regulator. If the plugs get loose but not unplugged you will over heat and destroy the fan motor. Using the main splice rather than the fuse link junction on the fender will give a better reading on you battery guage. The wire from the battery to main splice is a bit small so it is best not to run the fans very long without the alternator spinning. Bottom line, theses fans compromise the electrical system to some degree without a weekend's worth of harness rework upping the battery charging wire size. It will numb the battery guage some but you will get correct operation of the guage and have less of a chance of cooking the harness going to the front right corner. If you simply wire to the fuse link junction terminal as most do, the battery guage will confuse the fan drawing power as a charging state to the battery. This is exactly opposite of true state. Placing the connection for fans at the main splice puts the power draw at the correct end of the battery guage shunt wire within the harness. Having a 70+ amp alternator is required but will not fix this guage problem unless wired correctly.

[pjmoreland]

I have a voltmeter, so that is a non-issue for me. I upgraded the size of the wire running from the main splice to the battery, so that is also a non-issue for me. Hard-wiring the fans sounds like a pain in the butt when it comes time to disassemble something.