CRG Discussion Forum
Camaro Research Group Discussion => General Discussion => Topic started by: barsteel on November 03, 2015, 07:54:06 PM
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Hello -
As is typical, what started out as a "simple brake check to make sure the car is safe" turned into a "complete system overhaul with 100% factory correct date coded parts", or at least that's what I'm now shooting for.
Anyway, here's 2 pics of the rotors that came on my '68 Z28. From what I understand, the 2 piece is the correct design. Is that the case, or were both types used with different time frames, or ?.
The "hat" from the 1 piece is rubbing on the inside surface of the rotor, so my guess is that I should go with a 2 piece.
Any disadvantage to the 2 piece?
Thanks...
Chris
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To my knowledge the two piece design was used in 67-68 with four piston calipers and the single piece in '69 when the calipers were changed from four to a single piston.
Mike
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Nope, '69s with J52 also used the two-piece rotor.
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The two piece was used in 69 also. My 04C has the 2 piece type.
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Attached are pics of my 69 rotors which I believe to be original. Can still almost make out painted number on hub = 263J1?
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The change to one-piece didn't happen until after 69.
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Back in the 80s I had to use the newer one piece rotors, as I could not find the original 2 piece anywhere. I had to have them turned down a little in that same spot where you show the caliper rubbing on yours.
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When I did a factory style disc conversion on my 68, 7 years ago, the kit came with one-piece rotors with a groove cut for 4 piston calipers. I can't remember the vendor right away.
Has anyone used the reproduction rotors for/with the 2 piece hub?
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When I was rebuilding the brakes on my early 11D 1969 SS/RS convert., one of my rotors was under specs and was not able to be cut. I could not find anyone making or selling just the rotor disc. I bought a repro 2 piece rotor asm. from a vendor (Heartbeat City), but the hub had some differences from my original. So I swapped the new rotor disc onto my hub (they matched up perfectly) and then trued the assembly on a brake lathe. Now, using the original hub, my rotors match and are both at almost new thickness. I put the new repro hub into stock as a backup in case I ever need it.
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I believe there is a difference between the '68 two piece and the '69 two piece rotors - at least they appear different on mine. I'll try to get pics or measurements to prove/disprove.
My 56,000 mile LS6 Chevelle (departed garage in 2011) had two piece rotors as well - still on the car presently as far as I am aware. Wish I had kept them -
Regards,
Steve
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When I was rebuilding the brakes on my early 11D 1969 SS/RS convert., one of my rotors was under specs and was not able to be cut. I could not find anyone making or selling just the rotor disc. I bought a repro 2 piece rotor asm. from a vendor (Heartbeat City), but the hub had some differences from my original. So I swapped the new rotor disc onto my hub (they matched up perfectly) and then trued the assembly on a brake lathe. Now, using the original hub, my rotors match and are both at almost new thickness. I put the new repro hub into stock as a backup in case I ever need it.
Thanks, I've been wondering about this and will probably do the same since I still have the good original hubs. I wish someone would sell just the rotors.
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Camaro Central offers just rotor. Pretty cheap to.
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Camaro Central offers just rotor. Pretty cheap to.
http://www.camarocentral.com/1967_1969_Brake_Rotor_Front_Disc_Rotor_Only_p/brc-634.htm
Paul
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What's the difference between 67-8 and 69 rotors?
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No discernable difference on mine - '68 Z as compared to the '69 Z 2 piece - look more identical than I remembered.
Regards,
Steve
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I didn't think there are any differences, but that parts listing indicated there was. It's wrong.
One part, used 67-69, 3901098, group 5.809.