C2 1963 - Z06 or Sintered brakes or mix

[Keith W.]

30837S110293

See attached pictures reference brake drum on my 63 Coupe.
I brought the car knowing it had the sintered brakes option however the front drums/outer finned look like they should be fitted to a Z06 ?

Stamped into the drum face is #3841825 Front left hand side and front right hand side

The finned type are only on the front

Q: Is this a normal set up for sintered brakes or over the years has someone mixed up Z06 type drums (front)

As always any advice would be good - Cheers KeithAny more info or pictures e mail me on kjswillcox@btinternet.com

[Joe L.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Keith------


These are NOT J-65 sintered metallic brakes. These are J-56 HD brakes. As far as I know, for 1963 these were originally only available as part of the Z-06 package. Of course, they could have been retrofitted to any 1963.

Only the HD brakes used finned front drums. J-65 used standard-appearing front drums.

[Bob J.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Keith, looks like somebody added Z06 / J56 shoes and front drums.
The front drums are service drums through GMPD with MAX DIA.
Bob

[Joe R.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Might want to add that front backing plates were vented with screens on ZO-6 cars! Also the rear spring is not ZO-6 and has also been modified with new spring hanger caps. Nice drums and shoes! Worth a pretty penny to someone with a ZO-6! JR

[Duke W.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Many of the parts look near new. The yellow rear shoe retraction spring doesn't even have any dust on it. It appears that OTC J-56 parts were added to what was originally a J-65 metallic brake option. Why, I don't know as the production J-65 was suitable for race track hot lapping. Duke

[Bill W.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Joe,
I seem to remember reading somewhere that the finish on J-65 drums was much finer, almost a mirror finish. Can you address this? Thanks! Bill

[Joe L.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Joe,
I seem to remember reading somewhere that the finish on J-65 drums was much finer, almost a mirror finish. Can you address this? Thanks! Bill

Bill------


Yes, the primary difference between standard brake drums and the J-65 was the finish on the friction surface. I do not recall, though, just how that finish differed.

[Duke W.]

Re: C2 1963 - Z06 or Sintered brakes or mix

The '63 Shop Manual states that drum friction surface should be honed to a 20 microinch finish for metallic linings. This aids break-in, however even after a few hundred miles ofeven light service the drums score and any trace of the original finish is removed.

[Keith W.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Thanks for all the comments gents much appreciated as always - just throwing it out there if I sold the Z06 front drums what figure $$$$ could I expect - roughly - or would it be better to sell the whole set front and rears - considering that the Corvette only has a 300bhp numbers matching engine - thanks again Keith

[Joe L.]

Re: C2 1963 - Z06 or Sintered brakes or mix

Thanks for all the comments gents much appreciated as always - just throwing it out there if I sold the Z06 front drums what figure $$$$ could I expect - roughly - or would it be better to sell the whole set front and rears - considering that the Corvette only has a 300bhp numbers matching engine - thanks again Keith

Keith-------


I can't say what it would be worth. However, you would need to sell the entire set, including front and rear drums and brake shoes. You can't "mix" J-56 shoes with non-J-56 drums and vice-versa.

[Joe R.]

Re: C2 1963 - Z06 or Sintered brakes or mix

The difference in the ZO-6 and the optional metallic brake shoes and drums were the ZO-6 had more metallic surface area due to the fact they were wider and have more pads. Of course that required wider drums due to that fact.

JR