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Old 08-19-2007, 06:46 PM
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Help! Electric Cooling fan set up. How do you...

I have an 81 Vette. It came from the factory with a mechanical fan on the pump and a 12 inch electric fan in the shroud. To increase space in the engine bay and save me from having a heart attack over trying to install the lower radiator hose I want to install just an electric fan setup! I am installing a performance 383 small block engine. How do I know what size fan will be enough to keep me cool at idle when setting in stop and go traffic?

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Old 08-19-2007, 07:09 PM
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That is a sixty four dollar question for sure. From what I"ve read, you "should" be able to get by with a 3000 cfm flat blade fan. It needs to be properly and completely shrouded TO the radiator to maximize cooling. Just zip tying to the radiator is not going to cut it.

If you have A/C on the car, make sure you get the relay/controller that turns ON the fan with the A/C or you will quickly blow the compressor.

I checked into the Spal brand and they had a killer fan/relay/controller setup that they assured me would keep my truck cool even when pulling my boat or camp trailer here in Arizona, providing I had it mounted correctly in my stock shroud.

Here is one that "may" be enough, but they do make a 3000cfm model too. (if my memory is correct)
fan and controller on eBay.

Mark

www.spal.com I think is their site.

Last edited by Jmark; 08-19-2007 at 07:14 PM.
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Old 08-19-2007, 08:22 PM
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Camaro, You might want to have a look at this site.
http://www.dewitts.com/pages/product...asp?ProdID=390

I used the SP020 on my 67 and completely did away with the engine fan & shroud. 400 horse small block and can't overheat it on a 100 degree day in traffic.

Hope this helps
Dan
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Old 08-19-2007, 08:43 PM
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YaHoo Mama!!!! $920 plus senders and controller? Yikes! Thats worth more than my whole truck! LOL

Mark
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Old 08-19-2007, 09:29 PM
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I don't know if it will fit in a Vette, but the Lincoln Mark VIII two speed fan, or the similar Taurus 3.8 two speed fan are supposed to be very effective. Nobody seems to have a definite answer on CFM, but I have seen some claims that the Mark VIII fans flow close to 4000 CFM.

The Mark VIII is relatively uncommon in junkyards, but the Taurus 3.8 engine was used for several years in the early 90's. If possible, you want to get the complete setup, including the relays, since these fans have a very high startup amperage.

Bruce
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