how much can I trust my stock driveshaft? (whipple 2017 4x4) what are people doing for high rpm/horsepower?

 

 

what did that run, if you dont mind me asking? did you just go with stock sizing?

 

 

thanks, I'll add that to my list of things I need to upgrade. My high speed stuff will be at the track, but Id rather not have to worry about breaking a ujoint.

 

For what its worth my 2016's driveshaft didn't grenade when it was spun to 150mph on the dyno the other day lol, but I'm a regular cab with a single piece steel driveshaft (4x4). I believe the total output shaft RPM was just over 6000rpm, which made me nervous as hell. I've looked around at custom options, but none of my local shops can balance a shaft to that rpm. I might take a stab at measuring it and ordering a carbon shaft from the driveshaft shop.

 

 

Is it true these 15-18 F150 driveshafts starts to get sketchy at 600whp or all speculation and no actual failures?

 

 

What's been happening when they fail?