Interest in a carbon fiber drive shaft from DSS?
Interest in a carbon fiber drive shaft from DSS?
02-11-2014, 09:44 AM
#2
(02-11-2014, 09:21 AM)300SD_KY the Drive Shaft Shop and I were asking "what if".
For my '79 300SD Turbo Diesel, a carbon fiber drive shaft would cost approximately $1,500.
If there was a group buy ...
Queue crickets
Duncansport
02-11-2014, 09:44 AM #2(02-11-2014, 09:21 AM)300SD_KY the Drive Shaft Shop and I were asking "what if".
For my '79 300SD Turbo Diesel, a carbon fiber drive shaft would cost approximately $1,500.
If there was a group buy ...
Queue crickets
02-11-2014, 09:53 AM
#3
" straighten up that star on the grill, assholes."
lgreeley83
02-11-2014, 09:53 AM #3As a comparison what is a good cost for custom aluminum? Is aluminum generally a go to? I don't even know. I do know my shaft having been modified for the 4speed swap in my w123 (prior owner did it) It's not balanced perfectly. So im in the market to send mine out sooner or later.
" straighten up that star on the grill, assholes."
02-11-2014, 10:34 AM
#4
A small diameter rotating shaft isn't throwing a huge amount of inertia around-your axles are solid steel and I don't see anyone going to hollow alloys for them.
Plus, people here seem to prefer heavier drivetrain components
Would a bigger alum DS fit under a w123? Rangers and Mustangs have them in the yards cheap
This post was last modified: 02-11-2014, 10:35 AM by Simpler=Better.
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Simpler=Better
02-11-2014, 10:34 AM #4The alum one on my truck is ~4" in diameter. The Jeep's steel DS is only ~2"
A small diameter rotating shaft isn't throwing a huge amount of inertia around-your axles are solid steel and I don't see anyone going to hollow alloys for them.
Plus, people here seem to prefer heavier drivetrain components
Would a bigger alum DS fit under a w123? Rangers and Mustangs have them in the yards cheap
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
02-11-2014, 01:19 PM
#5
But is it really worth it for $1500?
'82 300D -3" straight pipe, ALDA deleted, 3in1 glowshift gauge, HX30, egr-less manifold, A/W intercooler
'14 Ram 6.7l cummins -G56 handshaker, wishing it was deleted
I've read where driveshaft manufactures won't build a super long drive shaft our of steel because they don't keep balance like aluminum or something like that. Idk, just thought it was sorta relevant.
But is it really worth it for $1500?
'82 300D -3" straight pipe, ALDA deleted, 3in1 glowshift gauge, HX30, egr-less manifold, A/W intercooler
'14 Ram 6.7l cummins -G56 handshaker, wishing it was deleted
02-11-2014, 02:33 PM
#6
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Simpler=Better
02-11-2014, 02:33 PM #6Steel rusts-the heep's has been wire wheeled& painted to slow down the crumbling. My Ferd's is bare alum and has no corrosion.
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
02-11-2014, 03:10 PM
#7
(02-11-2014, 02:33 PM)Simpler=Better Steel rusts-the heep's has been wire wheeled& painted to slow down the crumbling. My Ferd's is bare alum and has no corrosion.
And of course I'm sick of rust
This post was last modified: 02-11-2014, 03:11 PM by lgreeley83.
" straighten up that star on the grill, assholes."
lgreeley83
02-11-2014, 03:10 PM #7So whats a custom aluminum go for? I think that's my most likely route.
(02-11-2014, 02:33 PM)Simpler=Better Steel rusts-the heep's has been wire wheeled& painted to slow down the crumbling. My Ferd's is bare alum and has no corrosion.
And of course I'm sick of rust
" straighten up that star on the grill, assholes."
02-11-2014, 03:35 PM
#8
What will the weight savings be with the CF DS ???
Ninth Year Anniversary with STD on 1-9-2020
visit: www.dieselfuelinjector.guru
Project 2018: Really get the car finished -- Turbo OM617 greater than 175 MPH goal.
RED W123 - left Germany as 240D in 1982. Full AMG body kit less rear apron, 2:65LSD, five speed Getrag 717.400, manual steering, read leather interior, manual brake conversion, electric water pump (EWP), and a bunch of other goodies ...
I got a mod'd DS with grease fittings and new center bearing, cost was $505 shipped.
What will the weight savings be with the CF DS ???
Ninth Year Anniversary with STD on 1-9-2020
visit: www.dieselfuelinjector.guru
Project 2018: Really get the car finished -- Turbo OM617 greater than 175 MPH goal.
RED W123 - left Germany as 240D in 1982. Full AMG body kit less rear apron, 2:65LSD, five speed Getrag 717.400, manual steering, read leather interior, manual brake conversion, electric water pump (EWP), and a bunch of other goodies ...
02-12-2014, 07:52 AM
#9
(02-11-2014, 01:19 PM)MFSuper90 I've read where driveshaft manufactures won't build a super long drive shaft our of steel because they don't keep balance like aluminum or something like that. Idk, just thought it was sorta relevant.
But is it really worth it for $1500?
It's not a question of balance. The length, diameter, and material of a shaft will determine it's fundamental resonance...if it turns at a specific RPM, energy builds in the shaft and it vibrates itself to death. Driveshafts are designed so that the maximum operating speed is below the fundamental. The longer the shaft, the lower the fundamental. And that's probably why the stock driveshaft is jointed. Here's a pretty good design study of CF driveshafts:
http://www.engineer.tamuk.edu/department...report.pdf
1987 Mercedes 190TD
(02-11-2014, 01:19 PM)MFSuper90 I've read where driveshaft manufactures won't build a super long drive shaft our of steel because they don't keep balance like aluminum or something like that. Idk, just thought it was sorta relevant.
But is it really worth it for $1500?
It's not a question of balance. The length, diameter, and material of a shaft will determine it's fundamental resonance...if it turns at a specific RPM, energy builds in the shaft and it vibrates itself to death. Driveshafts are designed so that the maximum operating speed is below the fundamental. The longer the shaft, the lower the fundamental. And that's probably why the stock driveshaft is jointed. Here's a pretty good design study of CF driveshafts:
http://www.engineer.tamuk.edu/department...report.pdf
1987 Mercedes 190TD
02-12-2014, 01:01 PM
#11
(02-12-2014, 07:52 AM)mxfrank(02-11-2014, 01:19 PM)MFSuper90 I've read where driveshaft manufactures won't build a super long drive shaft our of steel because they don't keep balance like aluminum or something like that. Idk, just thought it was sorta relevant.
But is it really worth it for $1500?
It's not a question of balance. The length, diameter, and material of a shaft will determine it's fundamental resonance...if it turns at a specific RPM, energy builds in the shaft and it vibrates itself to death. Driveshafts are designed so that the maximum operating speed is below the fundamental. The longer the shaft, the lower the fundamental. And that's probably why the stock driveshaft is jointed. Here's a pretty good design study of CF driveshafts:
http://www.engineer.tamuk.edu/department...report.pdf
Very interesting read, I thought it would make a good bit of difference, but it ends up that it didn't! Guess the real bonus would be losing the weight, maybe a little better mileage?
'82 300D -3" straight pipe, ALDA deleted, 3in1 glowshift gauge, HX30, egr-less manifold, A/W intercooler
'14 Ram 6.7l cummins -G56 handshaker, wishing it was deleted
(02-12-2014, 07:52 AM)mxfrank(02-11-2014, 01:19 PM)MFSuper90 I've read where driveshaft manufactures won't build a super long drive shaft our of steel because they don't keep balance like aluminum or something like that. Idk, just thought it was sorta relevant.
But is it really worth it for $1500?
It's not a question of balance. The length, diameter, and material of a shaft will determine it's fundamental resonance...if it turns at a specific RPM, energy builds in the shaft and it vibrates itself to death. Driveshafts are designed so that the maximum operating speed is below the fundamental. The longer the shaft, the lower the fundamental. And that's probably why the stock driveshaft is jointed. Here's a pretty good design study of CF driveshafts:
http://www.engineer.tamuk.edu/department...report.pdf
Very interesting read, I thought it would make a good bit of difference, but it ends up that it didn't! Guess the real bonus would be losing the weight, maybe a little better mileage?
'82 300D -3" straight pipe, ALDA deleted, 3in1 glowshift gauge, HX30, egr-less manifold, A/W intercooler
'14 Ram 6.7l cummins -G56 handshaker, wishing it was deleted
02-12-2014, 07:15 PM
#12
i used to own a 2006 Subaru STi and one of the most recommended upgrades was a CF drive-shaft ...
lose weight, gain a little mpg
if i won the lottery, after paying the mortgage and setting up college funds for the kids ... ;-)
my main interest is the weight saving, relative bullet-proof nature of CF and that the manufacturer is highly respected.
i used to own a 2006 Subaru STi and one of the most recommended upgrades was a CF drive-shaft ...
lose weight, gain a little mpg
if i won the lottery, after paying the mortgage and setting up college funds for the kids ... ;-)
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