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Topic: electric fan push or pull

in Forum: C3 Cooling and Heating Systems


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electric fan push or pull

Posted: 5/30/13 5:04pm Message 1 of 3
rlu1968
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Gordonvillle, TX - USA
Joined: 11/28/2003
Posts: 228
Vette(s): 1968 Roadster 427
Now that I am going back with the copy cat of the original engine in my 68. 427 big block,  I am thinking about reducing the heat under the hood so I am going with manifold rather than headers. 
A  aluminum radiator, in which I was going to go with DeWitt with the elect fan.  My mechanic told me to get the aluminum radiator but put the elect fans on the front side of the radiator (where the air first comes in) I guess a pull type fan, mechanic said just reverse the polarity and the fan will go in reverse, and keep the engine fan in place. That way you have two ways to keep the engine bay cool. I am not sure the elect fans would fit on the outside with the cross braces that are welded in front of the original radiator. 
Has anyone tried this before?




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Re: electric fan push or pull

Posted: 5/30/13 7:58pm Message 2 of 3
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Depending on what type of blades the electric fan has, wiring it to run in reverse may not work at all, and is really not a good idea anyway, imho. If you have the DeWitt's radiator and fan combo, I would suggest running it the way it is designed to work. If you have room for the engine driven fan along with the electric(s), it would certainly help cool the beast.
just my .0002



Joel Adams
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Re: electric fan push or pull

Posted: 5/31/13 9:13am Message 3 of 3
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69BBConv
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Cincinnati, OH - USA
Joined: 12/17/2003
Posts: 100
Vette(s): 1969 convertible 427/390 5 speed triple black with L-88 hood; 2019 Stingray Coupe, auto, Long Beach Red; 2022 HTC, Hypersonic Gray; 1999 coupe donated to NCM
Use the DeWitt's setup as designed and remove the stock mechanical fan and shroud. A pull fan is more effective than a push setup.


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in Forum: C3 Cooling and Heating Systems


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