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Author Topic: Electric cooling fan  (Read 999 times)
Bob & Tracey
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« on: September 20, 2013, 12:38:53 PM »

Is anyone running an electric cooling fan instead of the engine driven fan? I think I would like to pursue this... Any thoughts???

Bob
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Bob & Tracey Rice    Cedar Grove, Wi. (40mi. Milwaukee)

1956 GMC PD4104
DaveNCari
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« Reply #1 on: September 20, 2013, 12:47:35 PM »

Instead of...NO! In addition to...YES!

I have a large electric fan blowing IN while the engine driven fan draws through.....

Dave
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Coming soon.....need of a bus-friendly RV park.....that values Liberty!

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FloridaCliff
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« Reply #2 on: September 20, 2013, 01:08:39 PM »

Hey Bob,

This is a topic that comes up every now and then.

I will let the residential engineers speak, but basically, for the amount of CFM you need, the size of the motor required to move that air, the generator required to produce the power,  its not worth it.

For the long time bus board  members "remember Two Dogs?"

Cliff
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1975 GMC  P8M4905A-1160    North Central Florida

"There are basically two types of people. People who accomplish things, and people who claim to have accomplished things. The first group is less crowded."
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bevans6
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« Reply #3 on: September 20, 2013, 01:10:16 PM »

I've seen four stroke buses running a bank of 16 to 20 electric cooling fans on a very large side mounted radiator, I assumed they were for engine not AC.  The normal presumption is that a two stroke generates too much heat, the radiators are too small and the electric fans don't generate enough CFM of airflow.  I think that if you say doubled the size of the radiators you might be able to use electric fans.  People have tried it though.

Brian
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1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
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chessie4905
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« Reply #4 on: September 20, 2013, 01:55:18 PM »

I think TwoDogs was quite successful with his electric fan setup. It may be still in the archives. Worth the read.
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GMC h8h 649#028
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TomC
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« Reply #5 on: September 20, 2013, 01:58:15 PM »

With the size of the 4104 radiator, the electric wont cool enough. Stick to what works and has worked for over 50 years. Transit buses can and do use electric fans mainly because they have each stop to cool off. Pulling a long grade is completely different. Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
niles500
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« Reply #6 on: September 21, 2013, 12:53:45 AM »

You call this successful?

http://www.busnut.com/bbs/messages/233/10584.html
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Bob & Tracey
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« Reply #7 on: September 21, 2013, 04:23:17 AM »

Thanks, I am hearing what I kinda thought already. I will leave things as they are.

Bob
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Bob & Tracey Rice    Cedar Grove, Wi. (40mi. Milwaukee)

1956 GMC PD4104
chessie4905
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« Reply #8 on: September 21, 2013, 05:51:58 AM »

  Successfull to him. Entertaining to the rest of us. AC condenser fan from 4905 should work, as the coils are about same size as 4104 rad. That motor draws a lot of amps though. He could install a torus fan setup from one of the city old looks. We put one on our 4104. One main problem with most GM's is engine to radiator clearance, which probably is limiting for the large electric motor required.
   Here's info for thought: http://www.electricfanengineering.com/
 Here is a location for replacement fan blades of more efficient design and airflow. Also cw or http://www.hortonww.com/products/products.asp?/en/39 rotation avail:
« Last Edit: September 21, 2013, 07:39:38 AM by chessie4905 » Logged

GMC h8h 649#028
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luvrbus
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« Reply #9 on: September 21, 2013, 06:00:12 AM »

Read the archives about Mark's (Boomers) electric fans on his Eagle a different set up but they work it has for years
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Don Fairchild
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« Reply #10 on: September 21, 2013, 09:48:28 AM »

Clifford, doesn't Hal run electric fans on his eagle. I know he has a four stroke but they work for him and he has that power dialed up a lot if I recall. I like hydraulic fans myself.

Don
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luvrbus
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« Reply #11 on: September 21, 2013, 09:53:28 AM »

Yea he does Don right now he running 625 hp on his series 60
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lvmci
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« Reply #12 on: September 21, 2013, 11:39:48 AM »

Hi All, I had asked once before about other options, specifically for situations where low rpms was causing heat build up, in a traditional fan belt set up. I don't remember if I ever asked properly about running an evapoative style 3/4 or 1 HP 24 volt electric fan belt motor to run the squirl fans off the same pulley, at maximum speed in those situations. Has any one ever done that? I was thinking if I was in stop & go fwy driving, the squril cages could draw the max amount of air thru the radiators and blow thru the engine compartment, standing still, of course the amperage draw would be the qualifier,  lvmci...
« Last Edit: September 21, 2013, 12:04:39 PM by lvmci » Logged

Mci 102C3 8V92, Allison 4 speed 740
Formally MCI5A 8V71 Allison MT643
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