Author Topic: Clutch Fan  (Read 59 times)

Offline DirksCuda

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Clutch Fan
« on: May 14, 2019 - 09:02:31 pm »
When the car is not running should ther be a bit of a drag on the fan. Mine seem to turn really free I wonder if that's right. I ran the car about 40 miles today an it ran at about 180 190. When I got back I let it sit at an idle an it went to 220. Im not running a shroud because it wont fit on the aluminum rad. If anybody has a 340 with a 26 in rad can u tell me the distance from the rad support to the top of the tank. this aluminum rad sets flush with the rad support. I think I might have to raise it up. I got the org 26 in rad but they want 500 bucks to rcore it Thanks for any help DirksCuda




Offline 70chall440

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Re: Clutch Fan
« Reply #1 on: May 15, 2019 - 12:33:26 pm »
When the engine is not running the clutch fan normally will spin freely if you reach down and move it.

You really need a shroud, get an after market aluminum one or make one if the stock one will not fit. Shrouds are especially important at low/no speed because they develop something like a vortex or venturi drawing air across the radiator.

I have a 416 (stoked 340) and a 26" radiator and the distance is about 1/2  if I remember right ( can look later).

What T stat are you running, from your temps it sounds like you are running a 185.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline DirksCuda

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Re: Clutch Fan
« Reply #2 on: May 16, 2019 - 06:41:39 am »
Yes it is 185. I bought a new clutch and am getting the orginal rad recored. Then I can run the orginal shroud. with this much money tied up in this car a little more will only hurt for awhile but then I will be sure Thanks for the info DirksCuda

Offline 70chall440

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Re: Clutch Fan
« Reply #3 on: May 16, 2019 - 12:36:10 pm »
You should be good once you get that installed
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline DirksCuda

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Re: Clutch Fan
« Reply #4 on: May 16, 2019 - 03:06:23 pm »
Hope So LoL

Offline 70chall440

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Re: Clutch Fan
« Reply #5 on: May 16, 2019 - 08:11:25 pm »
You should be. a factory clutch fan and a shroud do wonders when it comes to cooling. Not saying it will fix everything but in your example you are pretty close to being solid; 220 it high but not terribly high and if it is running 180 - 190 while driving the system is working. Granted you are going to change it all but so long as it is all works, you should be good to go.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)