930s can hold a ton of power, power is not the issue. Extreme angle, heavy shock load (smashing the whoops etc.), and lack of lubrication.
1) get quality cv joints
2) measure you axle angle , shoot for 23* or less
3) quality cv grease (swepco/belrey)
4) pull back you boots and to check cv grease and pump fresh in, its surprising how dry trans side cv joints can get after a few trips. (pulling back your boots and pumping grease in is not servicing CV joints! every summer make sure you take them out clean inspect and re grease)
5)remember landing on the throttle/ smashing the whoops may be more expensive than it looks.