Mechanical clutch fan
#1
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My electric fan isn’t keeping up at slow speeds. I’m thinking of going back to mechanical fan. Does anyone k ow of the stock truck setup will work if I have 3” of clearance from the threaded portion of the pulley to the rad?
#2
TECH Senior Member
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Which vehicle is it? Is there room for a pusher fan in front of the radiator? Otherwise there are thinline fans that might work.
#3
TECH Resident
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There are many very good electric fan options out there. It seems to me that many OEM electric fans perform very, very well. I've got a Fox body Mustang and I've used an electric fan from a 1990's vintage Lincoln MKVIII. These fans were very popular in the Fox body Mustang world 15-20 yrs ago. That MKVIII electric fan did wonders for my Mustang's AC system's cold air when sitting at a stop light at idle speed as it moves a tremendous amount of air through the condenser. I do have a high output alternator that provides 90+ amps at idle. Personally, I would not go back to a mechanical fan.
These days, I hear a lot of people are successfully using Ford Contour fans as well as 4th generation F-body fans. There are probably others as well.
One last thing. Greg recommended a pusher fan but from what I know, electric fans are good at "sucking" air but they're not very efficient at "pushing" air. I proved that to myself several years ago when I built a temporary paint booth. I tried to use my garage, barrel fan to push air through my big filter. Very little airflow. When I moved the fan in front of the filter so that the fan could suck the air through, I easily had double the airflow and it actually pressurized my clear plastic sheet paint booth. I'd only use a pusher fan as a last option. Just my opinion which isn't even worth 2 cents!
#4
TECH Senior Member
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You are correct in that pusher fans are not nearly as efficient as pullers, as a shroud allows pulling thru the entire core, but pushing thru a core does not really allow that.
#6
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Sorry for the slow reply.
I'm working on a CJ5.
I'm going to try the Contour fan. I had no idea how popular this fan is... back in the day it was the Taurus fans... Anyhow I ordered a fan up and should hopefully get it installed in a few weeks!
I have a pusher on it and its definitely not enough at slow speeds.
I'm working on a CJ5.
I'm going to try the Contour fan. I had no idea how popular this fan is... back in the day it was the Taurus fans... Anyhow I ordered a fan up and should hopefully get it installed in a few weeks!
I have a pusher on it and its definitely not enough at slow speeds.
#7
TECH Resident
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sweethome, I think that you made a very wise purchase. In fact, you may not need that pusher after you install the Contour fan. Please don't forget to come back to this thread and update us on your results after you install your new fan.
BTW, you still didn't tell us what electric fan you've been using.
BTW, you still didn't tell us what electric fan you've been using.
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#8
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sweethome, I think that you made a very wise purchase. In fact, you may not need that pusher after you install the Contour fan. Please don't forget to come back to this thread and update us on your results after you install your new fan.
BTW, you still didn't tell us what electric fan you've been using.
BTW, you still didn't tell us what electric fan you've been using.
I also ordered a factory style aluminum rad with Chevy bottom port location off ebay the width of the core matches the size of the contour fan and has more overall area but its 3 core instead of the 4 core in there now. Hopefully it all works correctly, if not there is always the more expensive LS swap rads...
I'm also going to add some louvers to the hood to let some of the warm air out.
Right not I think my issue is sub optimal air flow.
#9
TECH Resident
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Thanks for letting us know what fan you've been running.
I did a quick internet search and looked at this: 16-inch Flex-Wave Reversible Electric Fan It says that your fan is rated at 2660 CFM. The highly recommended OEM fans will easily outperform that fan. You should be happy after you get the Contour fan installed.
Do you have a high output alternator?
I did a quick internet search and looked at this: 16-inch Flex-Wave Reversible Electric Fan It says that your fan is rated at 2660 CFM. The highly recommended OEM fans will easily outperform that fan. You should be happy after you get the Contour fan installed.
Do you have a high output alternator?
#10
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Thanks for letting us know what fan you've been running.
I did a quick internet search and looked at this: 16-inch Flex-Wave Reversible Electric Fan It says that your fan is rated at 2660 CFM. The highly recommended OEM fans will easily outperform that fan. You should be happy after you get the Contour fan installed.
Do you have a high output alternator?
I did a quick internet search and looked at this: 16-inch Flex-Wave Reversible Electric Fan It says that your fan is rated at 2660 CFM. The highly recommended OEM fans will easily outperform that fan. You should be happy after you get the Contour fan installed.
Do you have a high output alternator?
#13
TECH Senior Member
#14
TECH Resident
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145 amps of output. It should put out plenty at idle as well. It should supply your new Contour fan with plenty of electrical power.
#15