Hi There,

My lil bit, that fan is all steel (alloy/tin blades perhaps) and is not for a clutch as stated elsewhere due to there being no provision for it, and also as it has the correct centre hole to locate on the pump snout, aside from the possibility of it really howling, and robbing a lil power, (surprisin how much they use) I cannot see any other downside to it's use. fans of that style and size are, or should I say were, quite common on our V8 Fairlane's, Falcon's n LTD's over here, back in the 70's and early 80's and are still regularly seen. Ihave one on a '72 Falcon Ute on a 351 W, runs a treat, and no cowl on this particular car

"MY TWO BOBS WORTH!" (Twenty Cents AUD)

Y-BLOCKS ROCK!!!!!

I've been using one of the 56 Ford A/C 5 blade fans. Seems to work well. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

I understand the problem - several guys have had the same close clearance difficulty.....these Hayden units are way long.

I don't have the time to invent one - but it would be neat to have a clutch that simply fits over the nose of the pulley. There are some new (diesel) truck clutches that are pretty flat - and have an electric actuator with a single wire that goes in the front. Those look like they have some possibilites - but seem to be way more expensive than we would wish.........

A donut shaped electric clutch part - that fits on a smaller pulley - ought to do the trick. Then you could use an electric thermostatic fan controller to turn it on and off. 

 
 Steve Metzger       Tucson, Arizona

Thanks but that won't fit in my car.

I think the fan in the picture might have the aluminum blades which are common - riveted to a steel center. 

This is a GM version from a '70's pontiac - with seven blades. Has the open center for a clutch - which then adds more weight. But the real point is, that the bearings are plenty big enough so long as they remain uncontaminated by water and slightly lubricated. The really big loads on the pump bearing comes from the belt or belts. The second big killer of the bearings is a bent blade that induces a higher speed vibration at many more cycles per second than the rotary RPM.

If you want to use a clutch type unit - it takes some room. T-birds have enough, but many of our outfits do not. This is the Hayden "Extreme Duty" P/N 2797 (5/8 shaft). There is a Hayden 4797 "Heavy Duty" that has a 3/4 shaft pilot and includes a stepdown sleeve for the smaller shaft.

The part number 2797 clutch has to have 3.75 inches from the mounting flange face on the pump shaft (remember to include the pulley clamped in there) - to the radiator. It also has to fit over the shaft nub while you are putting it on. The clutch housing sticks out the front and doesn't really need a much room as the fan - but I wouldn't fit it too close.

 
 Steve Metzger       Tucson, Arizona

The photo of the 6 blade fan looks really heavy & cumbersome. I had a 6 blade on my 57 car as it was at one time used for towing a holiday trailer, but it was not like that one. It looked like a 6 blade version of the regular fans..

Paul

Howdy,



I am using a Hayden 19" 6 blade aluminum fan with a clutch on my 292.



Hayden makes a 6 blade 18" and 19" fan along with a suitable clutch that will bolt to the front of a Y.



The entire assembly is very light.








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1955 F-600/272/E4OD// Disclaimer: No animals were injured while test driving my F-600 except the ones I ran over intentionally!

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This post was created using OpenSuSE Linux x64 and Firefox

While living on a mountain in Wyoming, a neighbor showed me how a flex fan works on a truck - not great.  At high altitudes and loads - lower gears / higher revs, just when additional cooling air would be nice - the vehicle slows down and the flex fan flattens out. Not a good match. Just the change to a non-flex steel fan was an instant improvement. Speedway used to have the best price for the steel and aluminum both.

Noise wasn't a problem on my bird until I put the smaller "speed up" pulley on there (to make the waterpump run faster). Many vehicles just don't have the room needed for a fan clutch - but the birds do and that turned down the noise.

 
 Steve Metzger       Tucson, Arizona

I've been running a six blzde fan on my f100 with a 292 for several

years with no problems. It doesn't see much high speed use, so I

haven't noticed any excessive noise. Worth a try.

55f100

West Monroe,La.

Without a clutch it might give the waterpump bearing a hard time too

Gary - 1958 Star Customline and 1940 Ford Deluxe Hotrod