i got a guy whos bent 2 drive shafts.

the car is a ls1 f body. he is the original owner, road races but doesnt drag race. the car is pretty much stock.

the first drive shaft bent with original suspension. at speeds of about 220-230 km/h. well some serious vibrations were met.

then it was replaced by a shop with a steel drive shaft for temporary use. tested it, ran fine for a bit at speeds of 220 km/h. then a short while later the vibrations came back.

went to the shop again, it was bent.

the only differenced between the two times was the second time he had some suspension mods done like new konis, relocation brackets, eibach pro kit, aluminum lcas.

now what the hell would cause two drive shafts to bend at speeds of over 220km/h???

 

no one?

 

Critical speed is too low. You either need a thicker wall or larger tube or stronger material. Any driveshaft will only spin so fast before it will want to turn into a jump rope. That driveshafts spinning VERY fast at those speeds. Especially if he has swapped the rear geras for something steeper. I owuld suggest you contact somoene like dennys driveshafts.

 

I would say with critical speed, or the DS is too long for the application... More likely the first one...