I used DriveshaftShop's carbon fiber driveshaft, which felt great but broke at 397whp/500N⋅m.
It was correctly installed and used for 1.5 years, when one morning the full throttle broke at gear 2.
Also the after sales service was very poor. Hence, I would not recommend their products.

 

wow, damn.

 

yikes. I feel like alot of these mechanical carbon components out there still hasn't been tried and tested enough. This goes for any brand. I think we will start seeing many more failures of carbon mechanical parts in the future.

 

yea i looked at this and i think i would be more inclined to trust aluminum over carbon. weight differential wasn't that much, either

 

You can't run carbon shafts next to extra hot exhaust components like catalytic converters. The radiated heat will cause exactly what you see here. The resin melted and the shaft failed.

 

I almost bought that exact part, hoping the reduced weight would make the acceleration more responsive. The master tech I know talked me out of it. He told me that he has seen instances where the CF driveshafts break, leading him to believe that they are not as reliable as OEM. I did not believe him then, but I did forgo buying the aftermarket carbon fiber driveshaft.

Agreed.

 

I think it would be much more reliable to use ceramic rotors.

 

For the space at the bottom of the evo x, I think it is unavoidable that the extra hot exhaust components like catalytic converters and the driveshaft are very close to each other. But from the surface of the resin can not see the phenomenon of preheating melting.

 

Resin will not "melt" or even become brittle when exposed to heat (unless very extreme) after its been catalyzed cured especially if cured by autoclave like these driveshafts are. cfrp is designed to withstand very high heat. I personally don't think it had much of anything to do with it being near the cat. That's just the center of most stress and I think it simply failed.

 

One of the carrier bolts is loose or did that happen when the driveshaft let go

 

Catalysts create "extreme" heat. On a pull that cat will be glowing bright orange, just like the manifold collector at the turbo flange.

I'm not sure what resin's DSS uses. But most hot cure stuff can handle about 300*C. That cat that appears to be within an inch of the driveline will run at over 800*C. Heat is 1000% what failed this driveshaft, even if it happened slowly over this 18mo time frame. The heat or what fatigued it. His car doesn't even make that much torque; 370wtq is nothing.

 

Rough, they arent cheap either. Mine has been good so far, knock on wood

 

**** It looks fragile

 

if I was you I’d get an open dump soon

 

Normally id agree with you, however the shaft yoke is not close enough to the cat to pick up that much heat, also looks like some sort of high flow cat where temps are significantly lower. While I would have wrapped it myself for assurance, it still should not have failed that easily. Im going to stick with engineering/manufacture defect. DSS makes great products but needs to go back to the drawing board for their CF dirveshafts.