Lubricant for Pin Drive spinner

[patrickt]

Originally Posted by ACademic

Please educate me. Structurally speaking, wouldn't adding another hole to the wheel hub actually weaken it? And if six is truly superior to five, then how come every OEM, including the 200mph cars (ZR1) still use five lug nuts instead of six? Maybe I'm comparing apples and oranges (lugs vs. pins clamped by a central spinner), but I'm all ears.

The problem is not six versus five, with six being better/stronger. Rather, the problem is with the mechanism that turns bolt-ons in to apparent pin drives. Six lugs are probably about the same as five lugs; six pins are probably about the same as five pins. Bolt-ons that are kludged in to appearing that they are pin drives are inferior because of the kludge. They are, in other words, a cur.

[ACademic]

Originally Posted by patrickt

The problem is not six versus five, with six being better/stronger. Rather, the problem is with the mechanism that turns bolt-ons in to apparent pin drives. Six lugs are probably about the same as five lugs; six pins are probably about the same as five pins. Bolt-ons that are kludged in to appearing that they are pin drives are inferior because of the kludge. They are, in other words, a cur.

I asked 3170, not you. I want a real answer. Nice try, rook.

[patrickt]

Originally Posted by ACademic

I asked 3170, not you. I want a real answer. Nice try, rook.

Well I'm not sure why you took offense to it. I gave you a simple, straight-forward answer.

[Cobra #3170]

Originally Posted by ACademic

I asked 3170, not you. I want a real answer. Nice try, rook.

It is the design of the 5 pin set up that is the problem not the number. at least the ones I have seen. On the technical side more fasteners are almost always better unless the number of holes weaken the parent structure. Formula Atlantics back in the Cosworth days had 12 flywheel bolts because of vibrational issues on a very small crank end flange. Aircraft design uses many small fasteners instead of a smaller number of large fasteners, heavy duty trucks use 6 bolt hubs, NASCAR is using lots of designs from the early days which are clearly outdated but they want to keep things "inexpensive".
I haven't done the math but I would bet that (6) 1/2 fasteners in shear would have a higher failure load than (5) 5/8" fasteners. On the other side of the issue it is harder to get more fasteners to pick up the load in unison.

[patrickt]

Originally Posted by Cobra #3170

It is the design of the 5 pin set up that is the problem not the number. at least the ones I have seen.

There's no shortage of threads on here about 5 pin problems. Most of them hold together just fine, but some have real problems. The truth is that the only reason they're used on Cobra replicas is to save money. That's just the way it is.