ACPT Carbon Fiber Driveshaft, Thread #2 - Page 12

rmo55c · 01-10-2007, 12:21 PM

Quote:

Originally Posted by mtskibum16

Have any of you checked out the recent aluminum DS thread? Seams interesting. If it turns out to be built well then it might be a good solution for those that can't justify $1000+ for the CF one. The DS costs around $500 and it is even a lb or two lighter than the CF one.

sweet - just wonder about quality of build, vibrations, and strength as a comparison between the two

mtskibum16 · 01-10-2007, 12:23 PM

Well, I know there was a few problems with them in the beginning, but this guy just installed it and it seems good. Installed smoothly and there was no vibration so...something to look in to.

Saabaru STI · 01-10-2007, 02:05 PM

I'm sticking with the CF one when I get one. I've heard too many good things about the CF, and too many bad things about the aluminum ones.

**SoJDM.com** · 01-11-2007, 12:43 PM

Our understanding is that the aluminum tube is larger in diameter requiring some floorpan mods. There're threads about this somewhere.

Additionally, the farther out from the center of rotation you place mass (larger diameter tube), the more power it takes to accelerate the rotating part (remember the merry-go-round thingie kids play on? More kids hanging on the outside, harder to push it up to speed. Same kids move to center and it gets easier to push up to speed). IOW, if you reduce the weight of a driveshaft but increase the diameter of the shaft, you have lost some of of the weight reduction advantage as far as the engines ability to spin it up more rapidly.

So, why make the tube larger in diameter? Because an aluminum tube the same diameter as the steel one it replaces would collapse under the torsion loads imposed unless the tube walls are much thicker (adding weight). Making a tube larger in diameter makes it stronger while allowing weight reduction in the walls.

**resonant_evil** · 01-16-2007, 09:28 PM

availability update please.

***amg destroyer*** · 01-16-2007, 09:47 PM

I really want to get a cf ds, but is it really worth over a grand?

**resonant_evil** · 01-17-2007, 07:36 AM

thats kind of personal.

**SoJDM.com** · 01-17-2007, 10:15 AM

Quote:

Originally Posted by resonant_evil

availability update please.

We had five STi units available and went down the list. Currently awaiting more. WRX currently in stock for immediate shipment.

**resonant_evil** · 01-24-2007, 06:37 AM

Quote:

Originally Posted by resonant_evil

availability update please.

it has been a week, whats new?

***QuickSilverSTi*** · 01-26-2007, 06:10 PM

How long is the wait list?
I'd like to see this one come to our market too:
http://www.pstds.com/critical_link_drive_shafts.htm

grim09 · 01-29-2007, 07:52 AM

Quote:

Originally Posted by QuickSilverSTi

How long is the wait list?
I'd like to see this one come to our market too:
http://www.pstds.com/critical_link_drive_shafts.htm

You don't want that one, i have heard just as many bad things about them then the DSS.

***QuickSilverSTi*** · 01-30-2007, 01:08 PM

Seriously?..too bad. Looks pretty stout given the intended application,Any links to reviews? I don't mind being a test mule but not if someone has already tried with bad results.

azn_ryder02 · 01-30-2007, 11:36 PM

is there anyone doing a gruop buy right now???

grim09 · 01-31-2007, 09:31 AM

Quote:

Originally Posted by azn_ryder02

is there anyone doing a gruop buy right now???

try sojdm.com they typically have group buys for sti driveshafts

grim09 · 01-31-2007, 09:38 AM

Quote:

Originally Posted by QuickSilverSTi

Seriously?..too bad. Looks pretty stout given the intended application,Any links to reviews? I don't mind being a test mule but not if someone has already tried with bad results.

i work in the automotive business and we sell driveshafts amongs other parts and i get calls from thier customers at least once a week stating that either the driveshaft broke or it is not balanced or a combo of my driveshaft broke and they won't do anything about it. so i end up selling them an ACPT driveshaft and i never hear from them again, unless they are ordering a driveshaft for a different car.

01-16-2007, 09:28 PM	#170
resonant_evil Gold Member Car: obp 05 sti Fav Mod: pre paid legal Location: clarksville, tn Posts: 422 IWSTI Addict since: Mar 2006 Trader Rating: (9)	update availability update please.

01-17-2007, 07:36 AM	#172
resonant_evil Gold Member Car: obp 05 sti Fav Mod: pre paid legal Location: clarksville, tn Posts: 422 IWSTI Addict since: Mar 2006 Trader Rating: (9)	worth thats kind of personal.

01-26-2007, 06:10 PM	#175
*QuickSilverSTi* nulla poena sine lege Car: '08 GT500 Location: Northern VA Posts: 1,768 IWSTI Addict since: Nov 2003 Trader Rating: (5)	How long is the wait list? I'd like to see this one come to our market too: http://www.pstds.com/critical_link_drive_shafts.htm Last edited by QuickSilverSTi; 01-26-2007 at 06:29 PM.

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01-10-2007, 12:23 PM	#167
mtskibum16 Professional STI Driver Car: 05 Subaru WRX STi Location: Montana Posts: 461 IWSTI Addict since: May 2006 Trader Rating: (1)	Well, I know there was a few problems with them in the beginning, but this guy just installed it and it seems good. Installed smoothly and there was no vibration so...something to look in to.

01-10-2007, 02:05 PM	#168
Saabaru STI Grassroots STI Racer Posts: 503 IWSTI Addict since: Mar 2006 Trader Rating: (1)	I'm sticking with the CF one when I get one. I've heard too many good things about the CF, and too many bad things about the aluminum ones.

01-11-2007, 12:43 PM	#169
SoJDM.com Authorized JDM Vendor Fav Mod: Anything JDM; well alot of stuff anyway Posts: 1,649 IWSTI Addict since: Nov 2005 Trader Rating: (23)	Our understanding is that the aluminum tube is larger in diameter requiring some floorpan mods. There're threads about this somewhere. Additionally, the farther out from the center of rotation you place mass (larger diameter tube), the more power it takes to accelerate the rotating part (remember the merry-go-round thingie kids play on? More kids hanging on the outside, harder to push it up to speed. Same kids move to center and it gets easier to push up to speed). IOW, if you reduce the weight of a driveshaft but increase the diameter of the shaft, you have lost some of of the weight reduction advantage as far as the engines ability to spin it up more rapidly. So, why make the tube larger in diameter? Because an aluminum tube the same diameter as the steel one it replaces would collapse under the torsion loads imposed unless the tube walls are much thicker (adding weight). Making a tube larger in diameter makes it stronger while allowing weight reduction in the walls.

01-16-2007, 09:47 PM	#171
*amg destroyer* Iron Fisted Car: '05 STi Fav Mod: Sparco seat Location: OC Posts: 4,463 IWSTI Addict since: Sep 2006 Trader Rating: (4)	I really want to get a cf ds, but is it really worth over a grand?

01-30-2007, 01:08 PM	#177
*QuickSilverSTi* nulla poena sine lege Car: '08 GT500 Location: Northern VA Posts: 1,768 IWSTI Addict since: Nov 2003 Trader Rating: (5)	Seriously?..too bad. Looks pretty stout given the intended application,Any links to reviews? I don't mind being a test mule but not if someone has already tried with bad results.

01-30-2007, 11:36 PM	#178
azn_ryder02 STI Driver Car: 07 STi Fav Mod: HKS Carbon-TI nicest exhaust ever Posts: 209 IWSTI Addict since: Jan 2007 Trader Rating: (0)	is there anyone doing a gruop buy right now???