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Driveshaft length vs rear axle movement and .....
#1130916
12/10/11 01:23 AM
12/10/11 01:23 AM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOc !
OP
The village idiot's idiot
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OP
The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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U-joint life?  I am guessing that I might wind-up with a DS that is about 12" long if I go with a long-shaft 727(because I want to maintain FULL-AUTO shifting). With a decent set of SS-type springs ...and longer shocks ... will I be in the danger-zone of spitting-out DS's(because of radial U-joint angles) ? ORE ...am I going to have to go with a aftermarket shortie kit on the trans ?
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Re: Driveshaft length vs rear axle movement and .....
[Re: dOc !]
#1130917
12/10/11 01:28 AM
12/10/11 01:28 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Most likely its going to put the U-joint in bind being that short of DS and SS springs... you would be way better off with a 4 link in that set up 
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Re: Driveshaft length vs rear axle movement and .....
[Re: dOc !]
#1130921
12/10/11 01:46 AM
12/10/11 01:46 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
I don't think my chassis-guy wants to build all that. He IS going to "build" the rear frame extensions ....
So what would be the cost on the bars, heims and shocks etc ?
Go look at http://www.swracecars.com/ and see what you want
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Re: Driveshaft length vs rear axle movement and .....
[Re: MR_P_BODY]
#1130922
12/10/11 01:54 AM
12/10/11 01:54 AM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOc !
OP
The village idiot's idiot
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OP
The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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OK ...I will  that ... but I am just looking for a ball-park at this point. How much LESS axle movement is there in a 4link vs leaf-spring ...in order to be effective?
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Re: Driveshaft length vs rear axle movement and .....
[Re: dOc !]
#1130923
12/10/11 02:03 AM
12/10/11 02:03 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
OK ...I will that ... but I am just looking for a ball-park at this point.
How much LESS axle movement is there in a 4link vs leaf-spring ...in order to be effective?
Go look ... they offer cheaper and higher price...
the thing with a 4 link you can control how much
movement you want... if you go over or under the
anti squat line
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Re: Driveshaft length vs rear axle movement and .....
[Re: dOc !]
#1130925
12/10/11 09:26 AM
12/10/11 09:26 AM
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Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
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Doc, I would call Mark Williams or another driveshaft company to see what their take on a short driveshaft is before going forward. A four link will definately keep the u joints closer to the proper angles,provided you keep the I C long. My worry is the angle of the driveshaft that could result from suspension travel.
The other thing that comes to mind is if you have a lot of suspesion movement, you also will have a lot of travel at the trans yoke. Possible bind?
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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