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Thread: 12" C4 rotor
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03-06-2006 #1
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12" C4 rotor
Gentlemen, I need a favor.
Does anyone have a 12" C4 rotor laying around that can take the following measurements?
Diameter (tape measure +/- 1/16" is fine.)
Thickness of the friction surface.
Backspace (distance from the inboard friction surface to the inboard mounting flange.
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03-06-2006 #2
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Carl I am installing my brakes from Touring Classics and I have a loose 12" rear rotor. When I get home I could take those measurements.
03-07-2006 #3
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Carl, I can check tonight. I have a set that never went on the car.
69 Camaro convertible, 410, M22, 8-pt cage therapy program. SOLD.
68 camaro - SOLD
67 Bel Air - New street project with perfect floors, frame and trunk!
03-07-2006 #4
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according to my catalog here at work the diameter is 12" exact, the height is 2.205" and the discard thickness is .724" so i would guess new would be around .735? i dont have an actual rotor to measure but those are the specs that napa provides me
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03-07-2006 #5
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I found a nominal thickness figure of .787" and min machine thickness of .744" discard thickness at .724" on www.autozone.com if that helps
03-07-2006 #6
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specs according to our books are as follows 88-92:
O.D. 12.0"
Height 2.20"
Nominal thickness .783
minimum thickness .724
wheel register 2.780
03-07-2006 #7
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Thanks!
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03-08-2006 #8
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Carl, do you have all the info you need?
69 Camaro convertible, 410, M22, 8-pt cage therapy program. SOLD.
68 camaro - SOLD
67 Bel Air - New street project with perfect floors, frame and trunk!
03-09-2006 #9
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Yes. Thanks for the follow-up!
Originally Posted by Rick Dorion
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03-16-2006 #10
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Just a heads up on the C4 12" rotors. The offset between the front and rears are different. Not by much, about 1/8" or 3/16" (can't quite remember). Can be used to slightly adjust the position for better fit up to the caliper location. Originally Posted by CarlC
The rears have the lessor offset.
Bob.
03-17-2006 #11
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Bob,
The 93-7 Z28 rotor is 11-1/2" diameter, while the C4 front is 12". However, as you mentioned, the offset on the C4 is 1/4" more. There's not enough difference in size to make the swap viable, not to mention the re-fabrication of bracketry to make up the difference in offset.VaporWorx. We Give You Gas http://www.vaporworx.com
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