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Viscos fan clutch v. electric fan inquiry
https://slantsix.org/forum/viewtopic.php?t=50264		 Page 1 of 1
Author:  wjajr [ Tue Nov 06, 2012 8:31 am ]
Post subject:  Viscos fan clutch v. electric fan inquiry
Now that the long Maine winter is just days away and use of the old heaps curtailed until April, it's time for tools to come out for some tinkering.

I’m once again considering deleting the constantly running power robbing factory four blade fan for a quieter more efficient cooling method. I understand that when an electric fan is running it probably requires the same energy as the old factory fan when spinning, but it does not operate continually thus less parasitic, and quieter. My car runs most of the time between 2000 & 3000 rpm (40 to 60 mph); that's a lot of air moving.

Now to the question; will a Mopar Viscos Fan Clutch package MOPP4120758 satisfactorily fit on the snout of a slant six in a ‘67 Dart in concert with a thin two tube radiator? Will it enable the same reduction of energy needed to accomplish adequate cooling compared to electric fan?

It seems both electric and viscos clutch fans cost about the same to install with all the fix’ens, including needed electrical upgrades to support an electric fan in these old buckets, which are already in place due to last winter’s under hood electrical remodel.

Any thoughts and antidotal stories regarding viscos fan use on a slant are welcome.

Nowhere can I find total depth of clutch and five blade fan enabling a mockup for fit before purchase of this unit.
Author:  DusterIdiot [ Tue Nov 06, 2012 8:53 am ]
Post subject:  Late cars
I run a stock 225- 5blade clutch fan from a Volare on my duster...if you go this route you will need the plastic fan shroud to go with it for best use of cooling...since the late car radiators are different from the 60's cars the shroud will not properly fit on your radiator...

FYI.

-D.Idiot
Author:  wjajr [ Tue Nov 06, 2012 1:45 pm ]
Post subject: 
DI:
Quote:
I run a stock 225- 5blade clutch fan from a Volare on my duster...
Do you suppose that the same critter as the one I listed? I can cobble up, or find something to act as a shroud.
Author:  emsvitil [ Tue Nov 06, 2012 4:07 pm ]
Post subject: 
There's a Mercedes fan that fits:

http://www.slantsix.org/forum/viewtopic.php?t=12665
Author:  SlantSixDan [ Tue Nov 06, 2012 4:21 pm ]
Post subject: 
I have several excellent-condition high-efficiency thermal clutch fans that I bought to check for fit in my '62 Lancer. That's hopeless; even though these I have are considerably thinner front to back than the old "clutch sticks out in front" design, there's damn near zero clearance between water pump and radiator in a '60-'62 car, so these fans I have are FS. Send me a PM if you like.
Author:  65 dartman [ Tue Nov 06, 2012 4:58 pm ]
Post subject: 
Quote:
I have several excellent-condition high-efficiency thermal clutch fans that I bought to check for fit in my '62 Lancer. That's hopeless; even though these I have are considerably thinner front to back than the old "clutch sticks out in front" design, there's damn near zero clearance between water pump and radiator in a '60-'62 car, so these fans I have are FS. Send me a PM if you like.
Wondering if they would fit a 63-66 car since there's a bit more room. If so, I'll send you a PM for particulars.
Author:  Aggressive Ted [ Sat Nov 10, 2012 5:20 pm ]
Post subject: 
Bill,

I find that an electric fan system in the winter is really nice. It let's the intake manifold and engine warm up quicker.....no wind blowing over it. In fact the fans never come on in the winter with the air dam I built. It scoops plenty of cold air up into the radiator. Click on the red link below my name to view pictures. The material I am using now is the black plastic that they put on the bottom of a snow plow truck shovel. It is super tough. I am running two small 10" fans up by the tank with a 195 electric switch screwed into the radiator tank. The engine warms up faster in the winter helping gas mileage a bunch......The two small fans only draw 10 amps. Still running the stock alternator with SL6 Dan's dual 10 gauge wiring mod to the battery with two 50 amp breakers. Just got one of the 120 amp Nipondenso alternators off an 89 Dakota rebuilt and ready to install.
The set up is pretty nice!

I did run the MOPAR viscous 5 blade clutch fan for a few years. The two small electric fans and air dam are far superior in many respects.
Author:  SlantSixDan [ Sat Nov 10, 2012 9:15 pm ]
Post subject: 
Quote:
Wondering if they would fit a 63-66 car since there's a bit more room. If so, I'll send you a PM for particulars.
Much easier to fit in most '63-'66 cars, yes.
Author:  wjajr [ Sun Nov 11, 2012 7:15 am ]
Post subject: 
Quote:
Click on the red link below my name to view pictures. The material I am using now is the black plastic that they put on the bottom of a snow plow truck shovel.
I’m not acquainted with that material, or just what plow truck shovel is.
Quote:
The engine warms up faster in the winter helping gas mileage a bunch......
I suspect your winter is not dissimilar from our November… Generally the old heaps are sent to storage by Thanksgiving in these parts, and won’t be over the curb burning gas until late April. I suspected faster warm ups with electric fan, as viscous clutch spin fan real good until engine warms up a bit.

What 10 inch units did you use, and did you make any type of shroud?
Author:  Aggressive Ted [ Sun Nov 11, 2012 10:12 am ]
Post subject: 
Quote:
Click on the red link below my name to view pictures. The material I am using now is the black plastic that they put on the bottom of a snow plow truck shovel.
Quote:
I’m not acquainted with that material, or just what plow truck shovel is.
Out here we have snow plow trucks that have huge blades keeping our mountain passes open all winter. To keep from damaging the roads they bolt a plastic guard on the bottom edge of the blade that makes contact with the road. That plastic material is pretty tough stuff and makes a great air dam for a car. I was always worried about scraping a curb, but no longer....
Quote:
I suspect your winter is not dissimilar from our November… Generally the old heaps are sent to storage by Thanksgiving in these parts, and won’t be over the curb burning gas until late April. I suspected faster warm ups with electric fan, as viscous clutch spin fan real good until engine warms up a bit.
True, we have frost and snow down to 2,000 feet. I drive my 74 Swinger year round so faster warm ups are nice especially in the winter.
Quote:
What 10 inch units did you use, and did you make any type of shroud?
As you can see from the pictures, no shroud as of yet. I was thinking of making one but they cool the radiator down pretty quick. I think I bought these fans, http://www.ebay.com/itm/2x-JDM-Black-9- ... 2e&vxp=mtr or these http://www.ebay.com/itm/9-Black-Slim-Th ... 16&vxp=mtr
I bought them as a test but, ended up running them a few years now. My old 16" fan had the curved blades and a much higher quality unit but it ran too long pumping cold air from the bottom half of the radiator which was a waste. The two smaller fans at the top are much more efficient and only run about 1/4 the time when on compared to the single 16" fan. If I were to upgrade I would go with the curved blade fans because they are more efficient and usually have a better motor.
Author:  wjajr [ Sun Nov 11, 2012 1:13 pm ]
Post subject: 
Thanks Ted.

After I scribbled the last reply, and entered it, realization that your photos had not been reviewed reared its ugly head.

That dual 9â€￾ fan looks like it would be worth a try where my rigging hums along between 2500-3100 rpm most miles driven.

After looking over your updated photo array, I see you have changed to a different coil. Are you still running orange box, or moved on to GM EHI?
Author:  Aggressive Ted [ Sun Nov 11, 2012 4:55 pm ]
Post subject: 
Bill,
Quote:
After looking over your updated photo array, I see you have changed to a different coil. Are you still running orange box, or moved on to GM EHI?
Yes, I have been running the HEI style coil for a couple of years now. It is a 3 ohm 60,000 volt Pertronix unit that allows you to ditch the ballast resistor. It takes a full 12+ volts just fine. Yes, still using the orange box. I have all the parts for the HEI conversion and a nice mount that goes under the coil. The weather turned bad out here and just haven't got it mounted up yet. Got to get the snow tires installed next.... The last thing I got was the Nipondenso alternator SL6 Dan suggested and had it rebuilt. That goes on after the snow tires, then the HEI, then the relays for the Black Hawk headlights. Working in the cold is never fun. Got a bad case of bronchitis at the moment...
Author:  Aggressive Ted [ Mon Nov 12, 2012 9:39 am ]
Post subject: 
Quote:
Bill,
Quote:
After looking over your updated photo array, I see you have changed to a different coil. Are you still running orange box, or moved on to GM EHI?
Yes, I have been running the HEI style coil for a couple of years now. It is a 3 ohm 60,000 volt Pertronix unit that allows you to ditch the ballast resistor. It takes a full 12+ volts just fine. Yes, still using the orange box. I have all the parts for the HEI conversion and a nice mount that goes under the coil. The weather turned bad out here and just haven't got it mounted up yet.

Need to get the snow tires installed next.... The last thing I got was the 120 amp Nipondenso alternator SL6 Dan suggested and had it rebuilt. That goes on after the snow tires, then the HEI, then the relays for the Black Hawk headlights. Working in the cold is never fun. Got a bad case of bronchitis at the moment...slowing down my progress on the upgrades. We had 8" of snow dump last night on the pass. Need to get the those sipped BFG T/A radial's back on the car. They work really well in the black ice and snow. Tried snow tires last year......what a disaster. Took them back and put the BFG's back on. No more problems.....
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