69 disc brake backing plates - Team Camaro Tech
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post #1 of 9 (permalink) Old Feb 24th, 09, 03:07 AM Thread Starter
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Brian
 
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69 disc brake backing plates

Anyone got a picture of the correct PDB backing plates for a '69? I've got some generic (read as repop) ones that have a cup spot welded to the plate, but the rotors won't fit inside this cup. I'm thinking that the original backing plates didn't have this cup, but I'm not sure.

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post #2 of 9 (permalink) Old Feb 24th, 09, 06:11 AM
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Re: 69 disc brake backing plates

I have a Polaroid pic of this in my album but no way to scan it in. The cup is there. Without taking my car apart I can't be 100% sure but I think the rotor might have a turned section that fits into the cup with clearance.

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post #3 of 9 (permalink) Old Feb 24th, 09, 12:12 PM
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Re: 69 disc brake backing plates

The cup is there, orig or re-pop. Sounds like you either got a bad set or some thing else is going on.
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post #4 of 9 (permalink) Old Feb 24th, 09, 09:16 PM Thread Starter
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Re: 69 disc brake backing plates

Anyone got the measurements of the ID of the cup and how deep it is? I'm using one piece rotors, too. Maybe that has something to do with it?

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Last edited by buenymayor; Feb 25th, 09 at 12:56 AM.
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post #5 of 9 (permalink) Old Feb 25th, 09, 09:44 PM
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Re: 69 disc brake backing plates

69's came with 1 piece rotors. Are you running the 69 single piston caliper or an early 4 piston set up?
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post #6 of 9 (permalink) Old Feb 26th, 09, 01:24 AM Thread Starter
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Re: 69 disc brake backing plates

I know at least the early '69s used a 2 piece rotor. I've got the single piston calipers, but I can't get the rotors on, much less the calipers.

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post #7 of 9 (permalink) Old Feb 26th, 09, 07:18 AM
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Re: 69 disc brake backing plates

I should be able to take some measurements today.
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post #8 of 9 (permalink) Old Feb 26th, 09, 09:19 AM
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Re: 69 disc brake backing plates

The orig BP i.d. is 3", the 1 piece rotors are machined to 2 3/4". The aftermarket BP is 3.25" i.d. Are you using the correct rotor? Should be Bendix 141039, Raybestos 5100, Dura 5514 just to name a few.
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post #9 of 9 (permalink) Old Feb 26th, 09, 08:35 PM Thread Starter
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Re: 69 disc brake backing plates

Thanks, Robert, that is exactly what I was looking for. I'll have to measure mine this weekend and check it out. Just from memory, I don't think the cups on mine are 3" That would explain the problem. Thanks again!

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