Quote:
Originally Posted by gpvecchi
A single piece driveshaft will probably vibrate because of wrong pinion angle. You can find a lot of threads about this.
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I didn’t see anyone mention vibration with a single piece but since you want to bring it up.
Going to a single piece driveshaft lowers the critical speed of the drive shaft which causes vibration, longer shaft, lower critical speed. There are many threads on this. One of them was a DSS aluminum driveshaft which failed on the dyno because of this. DSS has admitted this is the issue and will reshaft an existing DSS driveshaft if you pay them too. The aluminum needs to be at least 3.5” to bring the critical speed up enough to work on our cars though there may be clearance issues, I talked to DSS about this myself as I have one of their aluminum shafts. The carbon does have a higher critical speed and issues with vibration on those may be down to pinion angle also being a factor but nobody has confirmed.