Clutch Fan Questions
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By Florida_Phil
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8 Years Ago
My 1955 Thunderbird does not overheat, but I am tired of the noise from the solid fan. Can I replace the 6 blade solid fan with a clutch fan without issues?
By GREENBIRD56
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8 Years Ago
Hayden makes a fan clutch that fits well on the T-bird - due to the extra space ahead of the engine. Hayden #2797
Make sure your fan blades clear the shroud correctly. This is an aluminum 7 blade from a GTO - but a six blade will do the job.
By DANIEL TINDER
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8 Years Ago
Got mine from CASCO. Works fine.
By Florida_Phil
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8 Years Ago
Thanks for the reply. I currently have a six blade solid hub fan. Sounds like a windmill! The Hayden #2797 clutch is available from a number of sources. Do you know what diameter clutch fan blade would fit my '55 Bird? Larry's sells the stock 17" fan. Should I buy a 17" or 18" clutch fan blade? What is the optimal distance for the blades to the radiator or shroud?
By GREENBIRD56
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8 Years Ago
Mine is an aluminum 7 blade cut down to 18 inches. Halfway out of the shroud is a decent target to shoot for. As far as the Hayden clutches go the Heavy Duty (p/n 2747) and the Severe Duty (p/n 2797) both fit - the 2747 requires a little sleeve / spacer to decrease the pilot fit to 5/8's. The Severe Duty is the best choice in my opinion - it has a much larger clutch area and the pilot is direct fit for the 'Bird.
By Florida_Phil
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8 Years Ago
Thanks Steve. My current fan is 18". I'll buy the 2797 and an 18" clutch fan blade. My car is a 3 speed manual with O/D. It will be nice to hear the motor instead of all that noise in first gear.
By GREENBIRD56
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8 Years Ago
Just be sure to take a good look at the "pitch" of the blades of fan you choose - they differ. The viscous clutch style fan drive loses about 10% of the rpm available due to slippage. If your hot idle is low - and you only get 90% speed - and the water pump speed is low as well - a "flat" fan can cause you a problem.
The one in my photo above is a Pontiac (GM) aluminum, 7 blade with a rather heavy pitch - cut down to size. Just one way of dealing with the problem ...... there are others.
By miker
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8 Years Ago
Based on Steve’s comments and my experience in truck/RV installations, you might start by looking at those fans. They’ve got a lot of pitch to move air under heavy loads at moderate rpm and lower road speeds. Anyone who’s driven a large gasoline RV up a hill knowns the roar that happens when clutch locks up to start moving air. I probably wouldn’t buy the most aggressive, but it would be worth a look to compare them to auto applications. Or like Steve’s, a hp big block application with air and power accessories.
By oldcarmark
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8 Years Ago
GREENBIRD56 (10/26/2017)
Just be sure to take a good look at the "pitch" of the blades of fan you choose - they differ. The viscous clutch style fan drive loses about 10% of the rpm available due to slippage. If your hot idle is low - and you only get 90% speed - and the water pump speed is low as well - a "flat" fan can cause you a problem.
The one in my photo above is a Pontiac (GM) aluminum, 7 blade with a rather heavy pitch - cut down to size. Just one way of dealing with the problem ...... there are others.
Hey Steve. Do You have a Part # for that Fuel Filter you have on your's? Or an Original Application?
By GREENBIRD56
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8 Years Ago
Its an AC Delco GF62 - I don't know if this exact style is still around. At one time they were Corvette parts. The Ford branded canisters usually come from Mustang restoration outfits.
By oldcarmark
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8 Years Ago
GREENBIRD56 (10/26/2017)
Its an AC Delco GF62 - I don't know if this exact style is still around. At one time they were Corvette parts. The Ford branded canisters usually come from Mustang restoration outfits.
Thanks. Rock Auto has them. $31.00. Cheaper than the Ones on Ebay.