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09-08-2008, 05:21 PM
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#1 |
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Member
Join Date: Oct 2002
Posts: 248
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Driveshaft
I am needing about a 3.5" diameter 57.5" long driveshaft that needs to go about 6500 rpm. The driveshaft people I've talked to say that a shaft that long' going that fast will be over the critical speed. I see lots of station wagons racing out there that don't seem to have any problems, what is everybody using at about this length?
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09-08-2008, 11:35 PM
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#2 |
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Senior Member
Join Date: Aug 2007
Location: California, Ky
Posts: 669
Likes: 61
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Re: Driveshaft
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Kris Rachford 69 Cobra 428CJ 4 Speed C/S 3032 |
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09-09-2008, 12:05 AM
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#3 |
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Member
Join Date: Jun 2002
Posts: 175
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Re: Driveshaft
RJ, I had the same problem with my "slug" until I put a Dynotech drive shaft in it, cured the problem.
When I had the rubber filled drive shaft it did not shake, after the "Canadian Transmission" was installed, it took 3 drive shafts until I talked to the guys at Dynotech and bought one of there shafts.
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67 Ford Fairlane F/SA 749 Last edited by Pat Cook; 09-09-2008 at 12:08 AM. Reason: cuz |
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09-09-2008, 12:29 PM
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#4 |
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Senior Member
Join Date: Sep 2007
Location: Henderson, NV
Posts: 583
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Re: Driveshaft
4" diameter would be recommended for that length and speed. You can find a critical speed chart at www.markwilliams.com
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