camaro two piece rotors

[onebad34]

I read the articles on the two piece rotors posted earlier. I was lucky enough to pick up two sets at spring carlisle this weekend.  Question, is there a difference between the 67's and the ones used on the 68-69 cars.  I was told that the 67's had holes drilled in the hat area to cool the bearings.  Are they interchangable and what do I need for on my 67 restoration project.  thanks Pete

[red67l78]

I have the original ones on my car and picked up a set for spairs.  What holes are you talking about for cooling bearings?
I can't see putting holes were the bearings are for grease would come out.  I also don't think 69 rotors were the same for the single piston calipers.

[rare4k]

the outer edge of the hub has a cut back on it to clear the dual calipers,

[RonM]

I looked at the rotors on my "68" which I believe are original and only the drivers side has the holes, three of them. Also a few years ago I picked up complete hub assemblies off of another "68" for spare parts, again only the drivers side has the holes except only two. I don't know what the holes are for, possibly to balance the rotors. Hope this helps, RonM.

[onebad34]

thanks for the input. the two sets we picked up at carlisle, only two has the three holes in them. someone at carlisle said that was for cooling, I don't think so.  I would believe for balancing before I would believe cooling.  thanks.  Pete

[L78 steve]

The holes are for balance .The vents between the rotor faces are for cooling .Steve.

[1968RSZ28]

Here's a NOS pair that just sold on Ebay for $1305.00!!     

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=230251358774&ssPageName=STRK:MEWA:IT&ih=013

Paul