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#1 |
Senior Member
![]() Join Date: Feb 2012
Location: chillicothe, illinois
Posts: 688
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500 HP and a two piece drive shaft
I am building a 468 for my 70 lwb. I am not sure if the two piece drive shaft will holt up. Anyone ever have problems with this?
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#2 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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Re: 500 HP and a two piece drive shaft
I have the 454 LS7 in my 69 lwb. Had the driveshaft tubes replaces with a stronger driveshaft tube(a lot heavier) its harder on support bearings but other than that never had a problem. Would like to redo it with something lighter? but dont know whats available now. I had this done 20 years ago when this was the only option...
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... ![]() |
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#3 |
Registered User
![]() Join Date: Oct 2012
Location: Newhall CA
Posts: 1,195
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Re: 500 HP and a two piece drive shaft
i use to break my center support all the time with a good shifting turbo 400 trans and a stock 327..they didnt make the aftermarket center support back then.
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69 SWB 780hp Hellcat powered, manual 6 speed, currie 9 |
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#4 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: 500 HP and a two piece drive shaft
As light as these truck are you should be OK, at least to start with, unless there are a lot of neutral drops in your future or your going with some very sticky tires. Any competent drive shaft shop can make you one that will hold up when your ready to plant all that horse power.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#5 |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: 500 HP and a two piece drive shaft
I build driveshafts for pretty much anything from a unimog to land speed cars, and limos.
We build driveshafts for 600hp stock cars using the same size tubing, weld yokes, and ujoints that came in our trucks from the factory. We also drill a 1"hole in the center of the weld yoke with no problems. Hp, torque, and mph will not hurt a carrier bearing. Vibrations kill carrier bearings. Most people have zero clue how to replace a carrier bearing and maintain the ballance of the driveshaft. This is the only reason people have any problems with our carrier setup. 600 hp is pushing it on 40 year old parts, mainly the stub and bolt on yoke. Its pretty easy to remake a stockish driveshaft with cheaper and better parts than were available 40 years ago. That being said its even cheaper to build a nice one piece driveshaft. Whatever you do don't use precision brand ujoints and be sure to have the shaft ballanced. Posted via Mobile Device
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67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, |
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#6 | |
Registered User
![]() Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: 500 HP and a two piece drive shaft
Quote:
Posted via Mobile Device
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1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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#7 |
Registered User
Join Date: Feb 2012
Location: Meridian, Idaho
Posts: 37
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Re: 500 HP and a two piece drive shaft
I asked a similar question at the driveline shop where I got my driveline balanced a couple of weeks ago. They indicated the carrier bearing is the weak link. I had already purchased a regular (stock) carrier bearing to use in my rebuild, but the shop indicated there were more heavy duty carrier bearings available (more expensive though). The shop did run a weld down each side of the two top plates for me to strengthen it up.
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1972 C20 Custom Camper 1972 C10 Under Restoration |
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#8 | |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: 500 HP and a two piece drive shaft
Quote:
Precision joints aren't really that much weaker than any other joint with a drilled cross. The problem is the poor tolerances the cups fit looser than any joint I've seen and when installed (the best you can with the parts in the box) their is excessive endplay making the shaft impossible to ballance. But hey they have a lifetime warranty ![]() The loose tolerances does make the joints wear faster, as well as the poor finish on the cross surface, the loose tolerances also increase shock loads and disperse load over a smaller area. I recommend spicer 5-1310 they are a non greaseable solid cross joint that most manufacturers use that usually last 100k-200k miles. That's what I have in my truck. Posted via Mobile Device
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67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, |
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#9 |
Registered User
Join Date: Nov 2009
Location: Michigan
Posts: 474
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Re: 500 HP and a two piece drive shaft
I see Summit Racing has a 3" Driveshaft kit on sale ( SUM-730404) for $260.96. Comes with 1350 u-joints and one end welded, I guess you cut to length and weld the other end yourself? But is it worth it?
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Brad handshoe |
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#10 | |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: 500 HP and a two piece drive shaft
Quote:
Considering we can build a shaft exactly to your specs, weld both ends (straight (within 0.010" and in time), ballance, paint, and ship it to your house for less id say NO again definetly not worth it in any way, shape or form. Did they say what kind of ujoints, I'm pretty sure summit sells precision (junk) and we could use spicer non greasable solid cross ujoints for less than the $260. Posted via Mobile Device
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67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, |
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#11 | |
Registered User
Join Date: Nov 2009
Location: Michigan
Posts: 474
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Re: 500 HP and a two piece drive shaft
Quote:
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Brad handshoe |
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#12 | |
Registered User
Join Date: Oct 2010
Location: lowell, in
Posts: 271
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Re: 500 HP and a two piece drive shaft
as soon as i get my motor and trans in,,ill get hold of you for a one piece drive shaft for my 68
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my build thread -- (http://67-72chevytrucks.com/vboard/s...d.php?t=438604) |
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#13 |
Registered User
Join Date: Feb 2010
Location: Louisville ky
Posts: 398
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Re: 500 HP and a two piece drive shaft
Ive thought about a one piece or just upgrading to a better 2 piece but my old one works fine for now
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#14 | |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: 500 HP and a two piece drive shaft
Quote:
Posted via Mobile Device
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67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, |
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