I am thinking 100lb/ft or so. I emailed Mackin and they forwarded it to Rays and the email I got back was basically, "Where the hell did you dig these up" ...so no help there...

Any other info would be helpful.

 

thanks for the info.

 

LOL!

Here's a good resource, it mentions center-locks on a Porsche GT being torqued to 407lb/ft!

http://www.discounttire.com/dtcs/infoWheelTorque.dos


I think - now I'm just using common sense here - if you multiply 80lb/ft by 4-lugs, you get 320lb/ft total torque holding that one wheel, it makes sense to use that - or a similar specification. I'm just speculating though, I maybe wrong since I haven't found a real answer yet but I'm doing a little research on center-locks myself.

Just to add - those are bad ***! I want center-locking hubs and wheels, maybe in the future.

I really do wonder where they came from or where they've been, probably worn by some vintage-race car at sometime. Wow.

 

I was thinking my full body weight on a 2ft breaker bar would be 360-400lbs/ft...and thats what I'll prolly go with.

As for their use...I have no idea. It looks like they had tires mounted once, they have no marks and are spotless...except for some polishing needs, and they even have the original valve stem caps with "RAYS" engraved on the top.

 

I'd recheck them after driving for the first time just to be on the safe side because unless there is a pin to secure them, these may tighten or loosen themsevles when stopping and accelerating depending on which way they tighten down (clockwise or counter-clockwise).

 

They will be checked quite often...but I would be suprised if they saw 1000 miles in a year. I thought about the problem of them getting loose as well. The wheels are staggered and one side is cw threads and the other is ccw...so that should help a little.

 

Pure sex!

 

AWESOME find!

 

Sorry I can't contribute much to this thread. Awesome find on the wheels.

All my experience with center lock wheels doesn't involve a torque wrench...

Wheels with a center "knock off" nut


And how they get tightened:


When in doubt, go old skool.

 

kinda interested to see them mounted

 

Becareful, try to find out for sure because the last thing I'd want to do is strip one of those lock nuts. You probably won't find another set.

 

http://www.layitlow.com/tech/wheels/daytonhowto.shtml