Blew up another CV joint..., What to do? Options

[yarin]

So I need some advice on this one:

2 years ago a CV went on me during an autocross, drivers inside (tranny side). The bearing race cracked and well, u know what happens then, no power transmitted means flatbed tow truck home. Replaced all 4 CVs with the kit from PMB performance.

All was well.... fast forward to today, the exact same joint blew. I haven't dissasembled for a post mortem but it isn't pretty. Luckily i flat tow the car to events now so getting home wasn't a problem. The car definitely took a beating today, put about 45 total runs (autox school x 2 drivers) on the car before it let go on Avon Tech RA tires, a few areas of the course induced some slip/grip stress.

Motor is relatively stock, probably putting out about 100-110hp crank. AutoX definitely put exess wear and tear on the part, running semi-sticky tires.

So what should I do, replace with another kit? OEM? Beef it up with 944 or heavy duty CVs? Any of you fellow autoxers have a solution that won't cost me a fortune?

Thanks!

[jhadler]

Just thinking out loud here...

Do you run on a particularly grippy surface? Concrete? Race track quality or hard, coarse asphalt? One thing to possibly suspect is flex in the trailing arm or the mounting points. If you're placing a significant side load on the car, and the chassis or suspension is flexing excessively, it's possible you could be placing too much of an axial load on the CV.

That it seems to be occurring on only one side implies a possible external cause.

If this makes sense, I'd check the trailing arms and trailing arm mounts for any signs of flex/fatigue/wear/cracking. Either that, or you're running your courses on part of an oval track, and use the same banked turn at most events... (IMG:style_emoticons/default/biggrin.gif)

Just a thought...

-Josh2