Centerlocks - I'm out! ....Hello 5-lug conversion!
#391
#392
GT3 player par excellence
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like Chris'
#393
Rennlist Member
I have my 80mm apex bullets if you want to test fit.
#394
#395
Cost of switching out center locks on 997
Is there an approximate total cost of switching out the center lock wheels on a 997? Both total cost and net of resale of old wheels (if there is a market for those). Thanks.
#396
Race Director
well the 5-lug kit is like $1750 at suncoast. You figure about 9-10hrs of labor, then of course you need new wheels, say $2000 for OZ.
so about $5,000 before you resale CL stuff?
so about $5,000 before you resale CL stuff?
#397
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#399
Burning Brakes
Thread Starter
#400
I was owner and President of Dayton Wire Wheels for 30 years. I now own a 2014 GT3 and have become fascinated with all the problems and comments about the centerlocks. The CL looks great but I am not sure Porsche should have tried to reinvent the wheel.
It has been known since 1912, that a conical nut inside a matching conical hub exhibits the follow action: The hub (which is attached to the axle and cannot rotate) applies weight vertically to just one portion of the nut taper. The hub, making just a point contact on a loose cap, moves around the cap taper and therefore causes the cap to move in the opposite direction of rotation. On the right side of the car, this is counterclockwise (LH threads) and clockwise (RH threads) on the left side of the car. Thus, the cap is self tightening.
This can be demonstrated by rotating a threaded shaft in a lathe and pushing down on the cap taper. The cap will turn in the opposite direction of rotation.
If the nut is flat and has no taper, this action will not occur.
Porsche evidently decided that they could overcome this effect by making the cap in two pieces so the taper could move independently. It may not work as intended if lack of grease does not allow slippage between the 2 parts.
It has been known since 1912, that a conical nut inside a matching conical hub exhibits the follow action: The hub (which is attached to the axle and cannot rotate) applies weight vertically to just one portion of the nut taper. The hub, making just a point contact on a loose cap, moves around the cap taper and therefore causes the cap to move in the opposite direction of rotation. On the right side of the car, this is counterclockwise (LH threads) and clockwise (RH threads) on the left side of the car. Thus, the cap is self tightening.
This can be demonstrated by rotating a threaded shaft in a lathe and pushing down on the cap taper. The cap will turn in the opposite direction of rotation.
If the nut is flat and has no taper, this action will not occur.
Porsche evidently decided that they could overcome this effect by making the cap in two pieces so the taper could move independently. It may not work as intended if lack of grease does not allow slippage between the 2 parts.
#401
I still have some brand new CL's with now 2 year old Michelin NEW tires. Make me an offer. For 2010 GT3 - NJ
and brand new in box front rotors & used Giro Discs and bolt in roll cage for 2010 GT3. gofishracing@aol.com
and brand new in box front rotors & used Giro Discs and bolt in roll cage for 2010 GT3. gofishracing@aol.com
#403
Drifting
#404