It is actually carbon fiber reinforced plastic with metal ends bonded in, if you want to get specific. However, some Mercedes models and the 2013 Shelby GT500 are some examples of OEM CF driveshafts. Ford is exploring the use of CF driveshafts in the Focus with the only issue being the relatively high current cost of CF. As the cost of producing CF drops and the minimum fuel economy standards rise you will start to see many other car manufactures using CF for driveshafts as well as body parts etc not only in their high end and halo cars but in everyday DD models. CF is by far the best option in terms of performance, weight, critical speed rating, torsional stiffness and vibration dampening characteristics. The real downside currently is the cost of production for CF.

I am not debating that for some people, paying a grand for a CF shaft seems excessive based simply on performance versus an aluminum model. However, you seem to be arguing that CF is inferior and is only for race cars which is not true. Also, the fact that CF shafts are used extensively in auto racing speaks to their durability as the environment they are subjected to on the track is far more stressing than what they would see in a street car.

Your statement that CF shafts on race cars need to be replaced or serviced every couple of years holds true for pretty much every dynamic component on a race car. However, I would expect that to be the case for a vehicle that is driven thousands of miles a year (practice, qualifying, race days) at the maximum limit of its performance. How many times to you see a car drop out of a race due to a driveshaft failure by the way?

All of the people on this group buy list are adults who can use google to research components just like you. They can decide if it is worth it to them to drop a grand on a CF shaft and you can decide to think that they are stupid for doing it if you so desire.

This thread was started for the purpose of a group buy on CF shafts, not to debate the merits of CF shafts. If you want to start you own thread on that debate then please do. You can call it "People Who Want CF Driveshafts are Idiots" and bash us all to your hearts content but please keep that debat out of this thread.

Thanks

 

Alright, im aware of the thickness of a typical CF drive shaft being 1/4" but if you take a cars speed while its in motion, take that speed along with the total weight of the car and find how much kinetic energy it carries, even a little pebble weighing just a couple ounces can crack the cf eventually. Its simple physics my friend.

Same concept goes for if i throw a pen at you from a 1 story building vs throwing a pen at you from a 100 story building, the amount of potential energy/kinetic energy of the pen will vary.

I understand this isnt a debate thread but when i see things like this i take it upon my self to inform those that may not know these things thats all..

 

If a object is hitting the car the total energy transfer is 1/2mv^2 where m is the mass of the object, not the car and v is the difference on velocity between the car and the object. if m was the mass of the car then every little dust that hit your car is like a car crash...... And at 1/4" thickness the carbon fiber is much more likely to shatter (takes a lot of force) then crack since there are so many layers. Judging from your answers so far you have never worked with carbon fiber... or at least quality ones. I am by no mean expert but I have design and manufactured a couple of structural carbon parts for a race car before.

 

Any word on pricing ??

 

If what you say if true then why do cars such as Nissan 370Z, Nissan GTR's and race cars use CF driveshafts? And why would company's such as Ford look into making thier cars with CF driveshafts?

There are obviously advantages with using Carbon Fiber. I think it is worth getting as a upgrade IF the price is right.

To each thier own...

 

Mark @PST won't be back until tomorrow so I will re-email him again tomorrow.

Bryan @PowertrainIndustries did not respond to my email from today yet.

I really just want to see what kind of discount/deal we get as a group. That will definitely make or break my decision.

 

PST uses 7075 Aluminium for the end links, not sure what the other company uses. 7075 is one of the strongest aluminium alloys and if they are the only one using it as the end link I would be a lot more incline to go with them. Aside from the bondage between the end links and the carbon the end links are probably the next weakest part.

 

Lol!! This thread just turned hilarious with all the extra crap.

 

dude, yes, formula is right but isnt the drive shaft attached to the car ? aka its part of the car ? Why do you think asphalt being picked up by cars infront of you on the highway is able to put a chip in your windshield??? SAME DAMN CONCEPT.

your theory would be correct if you sat on your driveshaft and drove it but in this case the drive shaft is obviously on the car THEREFORE part of the car.

Again the drive shafts you guys speak of on the cars you speak of are STEEL drive shafts reenforced with carbon fiber. or in some cases it may be aluminum driveshafts reinforced with carbon fiber i hope that answers what you wrote Bong.

 

• Lighter than steel or aluminum.
• Three times torsional strength of steel.
• Torsional spring rate allows better tire hook-up.
• Torsional spring rate allows smoother shifting.
• Less shock load to the differential.
• Eliminates or dampens high speed vibrations.
• Reduces transmission and differential breakage.
• Characteristics can be varied by changing the wind, angles or diameter. PST offers both steel and 7075 Billet Aluminum yokes.
• In drag racing applications - a better 60 Ft. time.
• ET's have been lowered in some cases by as much as .120.
• In stock car racing better control out of corners is the result of the torsional spring rate.
• In road racing smoother shifting and better durability of transmission and differential have been reported.
• Tested on Cobra's at 180 MPH on Dyno with no vibrations.
• A much greater safety factor - carbon fiber will return to a fiber and not create shrapnel under the car, as would aluminum or steel shafts.

 

Add name with G37 model here. Please copy and paste the last list along with this message

1. Bong1012 (2008 G37S coupe 6MT RWD)
2. dal1307 (2008 G37S Coupe 5AT)
3. Polar_g37s (2008 G37S Coupe 6MT)
4. Chi-City-G
5. Kevalteam (2008 G37 Coupe 5AT)
6. SharpByCoop (2008 G37 Coupe 5AT)
7. huwee06 (2009 G37 Coupe 6MT)
8. Elperuano (2008 G37 Coupe 6MT)
9. eksigned (2013 G37S Coupe 6MT)
10. thebiglubinsky (2013 G37S Sedan 7AT)
11. Jamesshifflett (2011 37 Sedan 7at)
12. WARAT (2008 G37S coupe 6MT)
13. G37Stampa(2009 G37 coupe 6MT)
14. Oreoleo (2009 G37S coupe 6MT)
15. Viper62382
16. infamousstunna1 (2008 G37S coupe 6MT)
17. Sewlman2 (08 G37S coupe 6MT)

 

Hey Daonlyilliz - why don't you seriously make a new thread about how terrible a carbon fiber drive shaft is because no one in here actually cares. This isnt a debate on why which one is better than the other, as you clearly stated a few posts back. They want a carbon fiber driveshaft because of many various reasons that they see more fit than an aluminum driveshaft. They did not ask for your opinion... only who wants to be on the list. Keep it on topic or pass on to the next post.

 

^ thank you wise one~~~
we have 17 members~~~ let's see what they can offer~~ ^^

Add name with G37 model here. Please copy and paste the last list along with this message

1. Bong1012 (2008 G37S coupe 6MT RWD)
2. dal1307 (2008 G37S Coupe 5AT)
3. Polar_g37s (2008 G37S Coupe 6MT)
4. Chi-City-G
5. Kevalteam (2008 G37 Coupe 5AT)
6. SharpByCoop (2008 G37 Coupe 5AT)
7. huwee06 (2009 G37 Coupe 6MT)
8. Elperuano (2008 G37 Coupe 6MT)
9. eksigned (2013 G37S Coupe 6MT)
10. thebiglubinsky (2013 G37S Sedan 7AT)
11. Jamesshifflett (2011 37 Sedan 7at)
12. WARAT (2008 G37S coupe 6MT)
13. G37Stampa(2009 G37 coupe 6MT)
14. Oreoleo (2009 G37S coupe 6MT)
15. Viper62382
16. infamousstunna1 (2008 G37S coupe 6MT)
17. Sewlman2 (08 G37S coupe 6MT)

 

1. Bong1012 (2008 G37S coupe 6MT RWD)
2. dal1307 (2008 G37S Coupe 5AT)
3. Polar_g37s (2008 G37S Coupe 6MT)
4. Chi-City-G
5. Kevalteam (2008 G37 Coupe 5AT)
6. SharpByCoop (2008 G37 Coupe 5AT)
7. huwee06 (2009 G37 Coupe 6MT)
8. Elperuano (2008 G37 Coupe 6MT)
9. eksigned (2013 G37S Coupe 6MT)
10. thebiglubinsky (2013 G37S Sedan 7AT)
11. Jamesshifflett (2011 37 Sedan 7at)
12. WARAT (2008 G37S coupe 6MT)
13. G37Stampa(2009 G37 coupe 6MT)
14. Oreoleo (2009 G37S coupe 6MT)
15. Viper62382
16. infamousstunna1 (2008 G37S coupe 6MT)
17. Sewlman2 (08 G37S coupe 6MT)
18. venzz (10 g37s coupe 7at)

 

Goodluck to you all.