Toyota GR Yaris - Destroyed the 2nd Carbon Fiber Driveshaft

[@massimo]

I believe in the video 'German Time Attack Masters at Hockenheimring', I commented/mentioned that it is a well-known issue here in Japan with that driveshaft. You did what you could by balancing it, yet the problem, it seems, is not just that. I considered installing it myself, and my tuner discouraged me from putting it on.

[@RotheliRacing]

@@massimo yeah. Apparently it doesn‘t like being raced. 🤷🏻‍♂️

[@NigelsModellingBench]

Rather than charge you shipping, maybe you should charge them your fees for raceday?

[@RotheliRacing]

@@NigelsModellingBench yeah. Especially after the second one failed in the first session…

[@dave_R_GR]

Sad you now had twice a bad experience with that. And by the looks of the fault it seems to be a major construction failure, which probably could easy be fixed by a new construction of the connection points. Anyway, hope there will be a better part soon, if the OEM part isn't enough enough anymore.

[@Murtayafourfun]

I saw one that had really let go and exploded at Crown Performance from a Mustang. Besides weight what’s the advantage over stock? All this hassle seems a bit of a ball ache.

[@Zonkobel]

Reducing rotaing mass. Reducing 1kg rotating mass is like reducing 10kg dead mass. Also you get better accelerating.

[@RotheliRacing]

@@Murtayafourfun what @zonkobel said. And it‘s a one piece part compared to the OEM two piece, which also reduces some wobble.

[@Murtayafourfun]

@@RotheliRacing Appreciate both your answers, thank you.

[@insertcoolname96]

@@ZonkobelI don't fully agree with this statement. This is usually true with rotating masses such as wheels, tyres and discs, but not so much in this case, because inertia depends on the square of the distance from the center of the rotating mass to the "edge" of the rotating mass. In the examples I mentioned previously the radius of the rotating parts is quite large, so the effect in the innertia is quite big, but not so much in the case of a driveshaft. I would say it helps a little with the response of the engine, making it a bit more rev happy, but I think that the effect wont be as dramatic as getting lightweight wheels for example. But hey, weight savings is always welcome 😁

[@Zonkobel]

@@insertcoolname96 i know the physics behind it. Less rotational mass means faster reving as you said, same effect as a lighter flywheel. And weight saving is weight saving.

[@thomasschachtschneider5142]

But the cardan shaft is really super tight on the body. Don't you think that the permanent impact of the shaft on the body might cause strong vibrations in the shaft, causing it to break? Is your car too low?

[@RotheliRacing]

@@thomasschachtschneider5142 it doesn‘t touch the body anywhere. 🤔 What impact could ride height have in this instance?

[@lauriedooker1031]

Do the carbon fibre driveshafts make any difference ?

[@RotheliRacing]

@@lauriedooker1031 huge difference if it would work.