No room!

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You probably do have room for a clutch fan…if you pick the right clutch fan. The Hayden space-saver clutch is a half/baby step in the right direction; you can do much better with a '70s Mercedes clutch fan. See here and here.
 
abodyjoe said:
what fan did you end up using ? i'll tell ya what that clutch is a ***** to get on there is so little room.. i got frustrated and my son (a bit more laid back then me) got his fingers in there and the bolts started..lol
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I used the Stock Clutching Fan that came with the heavy duty cooling package on A bodies in 1965...
20170606_122006.jpg
only reason I needed the shorter clutch unit was I installed a thicker aluminum radiator... and was able to use my Stock Fan Shroud & Fan... that is also part of the heavy duty cooling package⚓

20170606_121903.jpg
 
D-Rocket said:
Fixed fans are ok for idling or slow mph cruising. Not so good for high mph/rpm highway driving. At highway speeds the fixed fan can actually end up acting as a wall not letting airflow through the rad properly causing heat problems. I'd only use a fixed fan if it was a restored # matching show car. If I couldn't squeeze a clutch fan in I'd use electrics before a fixed.
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I've heard people say that, but I've never had my car run hotter at high rpm/speed.
 
furyus2 said:
I've heard people say that, but I've never had my car run hotter at high rpm/speed.
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First hand experience. High compression 440 auto, 391 gears at 70 mph used to get on the high side of the heat gauge with a fixed fan. Only change I made was installing a clutch fan and the heat went down to (normal) the same as idle and low speed cruising.
 
roccodart440 said:
It's the most fun when it happens on a diesel. YOu lose steering and brakes as well.
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I'm really surprised that Dodge had went to that....I can remember when I was kid.......people(other than GM guys...lol) would put that system down in the Shover and leter lays duallies back in the day.
 
clifcuda65 said:
I used the Stock Clutching Fan that came with the heavy duty cooling package on A bodies in 1965...View attachment 1715091435 only reason I needed the shorter clutch unit was I installed a thicker aluminum radiator... and was able to use my Stock Fan Shroud & Fan... that is also part of the heavy duty cooling package⚓

View attachment 1715091436
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Cliff......school me again please......LOL

What diameter is that fan and what is the part number for that fan blade? Please...I'll be ya bestest friend......
 
moparlee said:
Cliff......school me again please......LOL

What diameter is that fan and what is the part number for that fan blade? Please...I'll be ya bestest friend......
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17 inch.... I "Think" the part number on the 7 blade fan was... 2463-657 but since I never had to replace it, I have no ticket on it to be 100% sure... The original fluid drive was 2536-675 because I had to replace that several times... but now pleased I have the new "Heavy duty" Hayden 2947 as I was on my last NOS Mopar unit... being Mopar's shortest, but not short enough for the thicker core Aluminum Radiator. Wish I could have helped you more moparlee, as I would like to have you as a "friend"⚓
 
At highway speeds the fixed fan can actually end up acting as a wall not letting airflow through the rad properly causing heat problems.
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I've seen that happen when the fan blade is installed wrong way round: air gets pushed, not very efficiently, through the radiator back-to-front. This gets the job done OK until a high enough speed that the airflow front-to-back from the car's forward motion "pushes back" on the fan's back-to-front airflow so effectively there's a wall of dead/still air at the radiator.

A right-way-round fan acting like this would violate some laws of physics.
 
slantsixdan said:
I've seen that happen when the fan blade is installed wrong way round: air gets pushed, not very efficiently, through the radiator back-to-front. This gets the job done OK until a high enough speed that the airflow front-to-back from the car's forward motion "pushes back" on the fan's back-to-front airflow so effectively there's a wall of dead/still air at the radiator.

A right-way-round fan acting like this would violate some laws of physics.
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That would depend on the prop speed, You'd have to have it wound pretty tight, lol!!!
 
D-Rocket said:
Fixed fans are ok for idling or slow mph cruising. Not so good for high mph/rpm highway driving. At highway speeds the fixed fan can actually end up acting as a wall not letting airflow through the rad properly causing heat problems. I'd only use a fixed fan if it was a restored # matching show car. If I couldn't squeeze a clutch fan in I'd use electrics before a fixed.
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mine don`t heat up on the hiway, cools down a bit actually.
 
roccodart440 said:
Why do you make electric fans sound like an undesirable choice?

I only run twin electrics, which fit great on a BB abody, cool amazingly and eat less HP.

I've overheated once in 20 years because the impellor fell off the water pump inside the engine. I can sit in traffic all day long on the hottest of days? Why? I have full shrouded cooling fan flow at idle.
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A lot of cars aren`t running 700 h.p. hi performance engines, that require more than 6 cyl elec. fans too !
 
clifcuda65 said:
17 inch.... I "Think" the part number on the 7 blade fan was... 2463-657 but since I never had to replace it, I have no ticket on it to be 100% sure... The original fluid drive was 2536-675 because I had to replace that several times... but now pleased I have the new "Heavy duty" Hayden 2947 as I was on my last NOS Mopar unit... being Mopar's shortest, but not short enough for the thicker core Aluminum Radiator. Wish I could have helped you more moparlee, as I would like to have you as a "friend"⚓
Click to expand...
Thanks...man....I appreciate it.
 
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