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BUSY BOLTERS Are you one?  The Shop Area
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#19140 02/08/2005 1:40 AM | Joined: Feb 2004 Posts: 110 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2004 Posts: 110 | The engine in my '65 is a 400sbc bored .030 and a high performance cam with Edelbrock manifold and 600cfm carb. It is bolted to a th400 and a 3:73 rear. Today I took it for a test and the water pump snapped at the bearing and the fan went out to lunch with the radiator for it's main course. I was using a 7 blade fan and a fan clutch. I think the weight of the fan and clutch was just too much for the quick torque. With this kind of power, would it be best to use a fan with the alum. blades that will twist under power and do without the fan clutch? I really didn't care for the noise it made when parts started flying. Anyone have any thoughts?
Truck Tinker | | |
#19141 02/08/2005 2:19 PM | Joined: Dec 2003 Posts: 510 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 510 | I run 7-blade fans and hydrostatic clutches on several cars, including a 375 hp 406. No problems at all.
I don't recommend flex fans. They're noisy, they don't cool well and they have a habit of failing catastrophically....like throwing blades thru the hood.
I'd think that the failure you had was a fluke. An imbalanced fan or a faulty clutch. Btw, when the clutches go bad, they can lock up and run all the time. That's real noisy and could weaken the fan if run for a long period of time that way.
I really don't have any problems with the 7-blade and hydrostatic clutches. I put one on my 292 to replace the solid mount and it's workin fine. | | |
#19142 02/08/2005 3:41 PM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | I had a buddy w/a 64 & sm blk 400 back in high school, snapped pumps left & right. His record was 13 water pumps in less than a year. 3.73s & a heavy foot was the cause. He finally went to a lightweight aftermarket plastic fan, no more trouble. I would go electric, we just did on my bro's truck, its unbelievable the revs it freed up by removing the fan. Brian | | |
#19143 02/08/2005 11:54 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | If you use a hydro fan clutch you need an original equipment one. The after markets aren,t any good. 
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#19144 02/09/2005 3:34 AM | Joined: Feb 2004 Posts: 110 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2004 Posts: 110 | Thanks, everyone. I am really tempted to go electric. Seems like a lot of people rodding go that route.
Truck Tinker | | |
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