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Author Topic: 69 FACTORY ROTORS  (Read 4280 times)

DONCZ28

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69 FACTORY ROTORS
« on: December 03, 2009, 04:34:31 AM »
DOES ANY ONE HAVE A PIX  OF AN ORIGINAL 69 FRONT ROTOR.   MY ROTORS HAVE  VARIOUS SIZE HOLES IN THE HUB (OUTSIDE DIAMETER)  NEXT TO THE DISC......I HAVE OWNED THE CAR SINCE 1982......DON....
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Jerry@CHP

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Re: 69 FACTORY ROTORS
« Reply #1 on: December 03, 2009, 02:15:46 PM »
That was for balancing,

Jerry
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DONCZ28

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Re: 69 FACTORY ROTORS
« Reply #2 on: December 03, 2009, 10:35:53 PM »
     JERRY, I HAVE SEEN PICTURES OF REPO'S, THAT CLAIM TO BE MADE FROM AN NOS PART, BUT I DO NOT SEE ANY BALANCE HOLES DRILLED.   DO MOST FACTORY ROTORS HAVE THESE HOLES?  ARE THE REPO'S NOT BALANCED? WAS THE SERVICE PART FROM GM UN BALANCED?........DON
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Dusk Blue Z

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Re: 69 FACTORY ROTORS
« Reply #3 on: December 04, 2009, 12:09:38 AM »
I have both the original rotors on my car, only one has the holes drilled to balance the rotor. I am sure there was a balance spec for the rotors when new, if they were within tolerance no additional machining was needed. Attached is a picture of the paint mark that was only on the rotor without the holes.
Mike
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Mike

1969 Z/28 Legends Certified
1969 Z-10 350 4 speed
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