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yarin |
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'14-X'in FOOL ![]() ![]() ![]() Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States ![]() |
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! |
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Katmanken |
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You haven't seen me if anybody asks... ![]() ![]() ![]() ![]() Group: Members Posts: 4,738 Joined: 14-June 03 From: USA Member No.: 819 Region Association: Upper MidWest ![]() |
Couple of thoughts..
The beetle cv's don't have as great an angle of operation as the 914 cv's... That is, the up and down travel of the wheel is less with the beetle cv's. If you measure the axle length and the amount you can move the wheel end of the axle up, you can do a little trig and get an angle of operation. If the angle measures more than the allowable operating angle,there is a clue. Another thought- looking at the crack, inward loading of the shaft on the cv race might load the slot in the race to produce the crack as shown. It does look like a fatigue crack that propagated. Look for nicks at either end of the crack- that's where they start. Starting end of the crack can have wear from rubbing together The other though is around modern crap. Some of the products made today are NOT the products of yesterday. Those parts were made made with fanaticism to produce a reliable part. Today it's nick on the part? use it... Heat treat? who cares if it's a little off, Poison in the drugs? Ship it... Poison in the pet food? Ship the product... Ken |
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