Stage 8 CV bolts
12-31-2011, 12:31 PM
#16
I agree....I've owned and beat the crap out of my racecar for the last six years and change transmissions from a S2 box to a turbo box for different tracks a couple of times a year...have yet to have a CV bolt come loose. The torque wrench is your friend. Checking CV bolts is part of a pre-track ritual just as brakepads, fresh oil, suspension bolts, etc. I think these locking bolts are more trouble than they are worth, but that's just me.
12-31-2011, 02:03 PM
#17
I'll throw another recommendation in for the OEM bolts. Porsche designed them with the concept of "stretch torque" in mind, thats why they are listed as a single use item. They are VERY effective at what they do and I have never seen a new one back out, only used ones. They weren't designed for 400rwhp either, tho.
I am guessing you'll have a bunch of fun trying to remove a Grade 8 bolt if the head rounds off as well.
I am guessing you'll have a bunch of fun trying to remove a Grade 8 bolt if the head rounds off as well.
One thing I *did* learn - get a GOOD socket. I bought a Snap-On. The first socket I had I got from Autozone, which worked, but was not a very good fit. I can see it being possible to strip out the head. Once I got my Snap-On socket, the fit was very snug, worked great.
12-31-2011, 04:32 PM
#18
Nordschleife Master
I had them backing out all the time at the track, even on first use. I switched to 12.9 allen heads from mcmaster carr, use a lock washer (star type) and have never looked back. Bolts are $10 for a box of 25 
12-31-2011, 06:50 PM
#19
Drifting
12-31-2011, 09:43 PM
#20
Addict
Rennlist Member
Rennlist Member
Have them and like them. Paying the Porsche price for single use bolts got old very fast, add to that the ****ty design of triple star and I was happy to switch to something else.
01-03-2012, 08:52 AM
#23
Drifting
While I never had the factory-type bolts loosen much in my 10 years of tracking the car (I'm religious about checking them before each event), I got tired of having to be so careful getting the triple square bit seated and lined up just right to keep from stripping the head. I also had some aftermarket bolts stretch so they wouldn't torque.
I think my box of 100 bolts cost me $25.
01-03-2012, 09:52 AM
#24
Addict
Rennlist Member
Rennlist Small
Business Sponsor
Rennlist Member
Rennlist Small
Business Sponsor
I have had the CV bolts back out on some cars – a lot of it depends on how well the previous owner or his/her mechanic treated the car. Its getting more and more common to find worn threaded holes on these cars. I had a car last year that I took great care in assembling since it was a 3.0 turbo that was going to see track time. Cleaned the flanges, used new bolts and set to factory torque….many of them backed out! I was going to use the stage 8 fasteners on his car but we used stronger axles and the clips would not work.
As these cars get older I am more and more tempted to locktite everything….but that would just **** off the next guy that has to wrench on the car!
BTW – I too had to shorten the stage 8 bolts on the wheel side of the axle.
As these cars get older I am more and more tempted to locktite everything….but that would just **** off the next guy that has to wrench on the car!
BTW – I too had to shorten the stage 8 bolts on the wheel side of the axle.
