Z06 brake drums ( Max diameter marks)

[John A.]

I have always thought that the Max Diameter marks on the finned drums were evidence of the aftermarket (1968, or so) drums. However if you look closely at the drums pictured in the Noland Adams restoration guide you can see that the pictured drum (PN 3841325) clearly has the Max diameter markings on it. ( Page 179). Could this be an original drum???
Thanks, John

[Bob J.]

Re: Z06 brake drums ( Max diameter marks)

John, you are correct.
The drum pictured in Noland's book on the top of page 179 is service drum through parts. Bob

[Franz E.]

Re: Z06 brake drums ( Max diameter marks)

[John D.]

Re: Z06 brake drums ( Max diameter marks)

It's really neat that the two biggest Z06 guru's in the country chirped in on the brake drum. Course JD already knew that info as the LWC used to be a Z06 as it came with a 7 leaf rear spring. Right Franzie??? JD

[James G.]

Re: Z06 brake drums ( Max diameter marks)

I AGREE JD !!

Will all you guys be at CORVETTE RACER CAR REUNION at CARLISLE August 27-29?

We need your imput.

[Dick W.]

Re: Z06 brake drums ( Max diameter marks)

I AGREE JD !!

Will all you guys be at CORVETTE RACER CAR REUNION at CARLISLE August 27-29?

We need your imput.

I might just have to come just to listen to all the lies that will be told on those three days

[Michael H.]

Re: Z06 brake drums ( Max diameter marks)

I might just have to come just to listen to all the lies that will be told on those three days

I'm, already makin up and writing down tall tales just in case I make it up there for that event.

[Franz E.]

Re: Z06 brake drums ( Max diameter marks)

[Franz E.]

Re: Z06 brake drums ( Max diameter marks)

It's really neat that the two biggest Z06 guru's in the country chirped in on the brake drum. Course JD already knew that info as the LWC used to be a Z06 as it came with a 7 leaf rear spring. Right Franzie??? JD

[Joe L.]

Re: Z06 brake drums ( Max diameter marks)

Franz----


I once had an opportunity to look over a very early 1968. It had been built the first month of production. It was a base engine car with THM-400 trans. It was owned by the original owner until the time of his death and was then purchased by a friend of mine from the estate sale. The car was driven from 1968 until 1978 and then stored. Looking it over, the car was virtually 100% original. It had a 7 leaf rear spring and HD, "coullee hat" rear shocks. The front springs were standard 68 small block without C-60 and the front shocks were standard suspension units. I'm very confident that the spring and shocks were original to the car.

[Franz E.]

Re: Z06 brake drums ( Max diameter marks)

Hi Joe:

That's not surprising. Rear suspension rate is a function of three components within the system: leaf spring, shocks and tires. When styling/engineering release a suspension combination to achieve particular ride characteristics and those components aren’t available, due to parts shortages, labor disputes or a host of other reasons, a deviation notice is issued for a number of vehicles or time period. The seven leaf spring was an acceptable substitute, higher spring rate, provided the shock valving was revised to compensate for increased spring rate. Ride would have been “rougher” but an acceptable comprise.

[Bob J.]

Re: Z06 brake drums ( Max diameter marks)

I'm, already makin up and writing down tall tales just in case I make it up there for that event.

Yes, that be a fun time........maybe time to explain Z06 drums and the reason most Z06's have incorrect drums.......not even considering the max diameter ones

[Michael H.]

Re: Z06 brake drums ( Max diameter marks)

Yes, that be a fun time........maybe time to explain Z06 drums and the reason most Z06's have incorrect drums.......not even considering the max diameter ones

It doesn't take much to turn the hurd in some incorrect direction on "Corvette facts".

If we tell the entire Z06 brake drum story, most won't accept it.

Also, I thought the "MAX DIAMETER" on brake drums began to appear before 1971?

[Bob J.]

Re: Z06 brake drums ( Max diameter marks)

It doesn't take much to turn the hurd in some incorrect direction on "Corvette facts".

If we tell the entire Z06 brake drum story, most won't accept it.

Also, I thought the "MAX DIAMETER" on brake drums began to appear before 1971?

Thats for sure.

As I remember the 71 was the deadline for having it and I'm sure many complied much earlier. I think we talked 30 years ago about there being a provision to hand stamp it in for old inventory.

[Michael H.]

Re: Z06 brake drums ( Max diameter marks)

Thats for sure.

As I remember the 71 was the deadline for having it and I'm sure many complied much earlier. I think we talked 30 years ago about there being a provision to hand stamp it in for old inventory.

I remember that long discussion we had in the 70's.

I seem to also remember seeing MAX DIAMETER drums in boxes dated around 1968 or 69. I think I have some paperwork on this somewhere that is also dated 1969.