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If you want an impact solution install 991 cup center locks on your car.
It’s doable. And will take an impact wrench. Not inexpensive...
Otherwise just deal with this crap like everyone else does. yeah, it sucks.
Or
Feel free to short cut it and post back here when you’ve lost a wheel at 150mph.
Yes and the drive pins are different as well. The system is designed to handle impact guns and lower torque rating as well.
Even so, I've seen Cup Cars at the track whose CL's look pretty torn up from the impact wrench. I would guess they don't last too long, but at least the wheel changes are painless.
Even so, I've seen Cup Cars at the track whose CL's look pretty torn up from the impact wrench. I would guess they don't last too long, but at least the wheel changes are painless.
They don't wear out as quickly as you'd think. The parts that I keep regular spares are for the stub axles and the wheel washer between the nut and wheel. Those parts tend to fail often.
Stub axles are about $350 each and the washers are $80 each from Porsche Motorsport. I think the nuts are around $75 IIRC but have a good service life.
If those don’t have the hammering impact action, then it could be a very interesting option!
Pretty sure the tool used in the Porsche video is at least 5-figures and you can see that it tightens from inside the splines of the locking mechanism (rather than on the outside of the CL nut). This requires a totally different attachment than the one we use (that comes with the car). You can also hear that there is no hammering in the Porsche vid.
The smallest of those Torcup wrenches in your first link costs $5,200:
These impact tools has evolved from generating not much torque, hard to hold, noisy to easy to hold, quiet, much more powerful in the past few years. Milwaukee is now offering their 4th Generation of M18 torque wrench and use oil to dampen the impact and are much quieter and a lot easier to hold onto, they don't "impact" like the older models I have. The top specs models all have 1500+ Ft-Lb of loosening torque which is enough to take apart any suspension and engine bolts that are rusted (or break them). Since now these guns produce more than enough torque for almost all non-heavy-industrial jobs, the design direction may go to making these guns quieter, easier to hold and softer and softer on impact. I just am not sure if these Gen 4 Milwaukee guns are soft enough for the job and thus asked the forum if anyone has tried them.
If those don’t have the hammering impact action, then it could be a very interesting option!
Pretty sure the tool used in the Porsche video is at least 5-figures and you can see that it tightens from inside the splines of the locking mechanism (rather than on the outside of the CL nut). This requires a totally different attachment than the one we use (that comes with the car). You can also hear that there is no hammering in the Porsche vid.
The smallest of those Torcup wrenches in your first link costs $5,200:
So, not exactly a bargain solution (but it does seem like a possible solution for a shop, particularly if one can find that internal splined attachment)...
They don't wear out as quickly as you'd think. The parts that I keep regular spares are for the stub axles and the wheel washer between the nut and wheel. Those parts tend to fail often.
Stub axles are about $350 each and the washers are $80 each from Porsche Motorsport. I think the nuts are around $75 IIRC but have a good service life.
How and why do the stub axles fail? Is this a Cup car or street car? (Cup and street show same P/N for stub axle).
What is the washer? I don't see it in the PET for Cup or street cars.
03-05-2019, 09:09 PM
