New (but correct) MC - painted black, bare, or ?

[barsteel]

The for sure survivors I've looked at have had the master cylinder painted. According to the latest new addition NCRS 68/69judging manual it states the following: "The master cylinder was painted a low-gloss or foundry black. A semi-circular machined area at the front of the casting was machined after painting and so should be natural finish. The flat at the front has PG stamped in it for power brake units and DC for manual brake units." And "The boss that the brake lines thread into is machined flat after painting and will be natural finish." JohnZ has stated “I was there in the assembly plants in the 60's, and Delco-Moraine painted the master cylinders and brake calipers black prior to machining; I never saw one unpainted.”
I purchased a late May69 power booster/master cylinder from Jere Stahl that had been given to him from Delco Moraine Engineering. On the production parts list sheet it calls for it to be painted black (see item 24).

Ok, now I'm a bit confused.  I ordered the MC and booster from Camaro Specialties (www.camaros.com), and their website, confirmed in a conversation with owner Bob, says that the '67 - '68 front power disc brake/rear drum MC should be coded "WT".

Is that the case?

Thanks...

Chris

[cook_dw]

67 & 8 are WT and 69 is US.

67 & 8 casting is also 346 and 69 is 309

[1968RSZ28]

http://www.camaros.org/suspen.shtml#Brakecomp

Paul

[ZLP955]

Chris I think Chick's reference may be to Corvettes, as the quotation is from the NCRS Judging Manual.

[68camaroz28]

Chris I think Chick's reference may be to Corvettes, as the quotation is from the NCRS Judging Manual.

Exactly Tim! Probably should have not put that portion of the NCRS Corvette verbiage in. Sorry Chris! A side note, I find NCRS is a great tool to check on what is considered "normal", or "generally found", as they have been at it for a long time and have a great tool with judging manuals. Calipers are like the master cylinder, painted casting and then machined.

[BULLITT65]

That book sounds like it may be a good read. Is that NCRS judging manual in a PDF form we can download for free or do the NCRS Corvette guys charge $100 for it?

[68camaroz28]

That book sounds like it may be a good read. Is that NCRS judging manual in a PDF form we can download for free or do the NCRS Corvette guys charge $100 for it?

Corvette Carlisle is this later part of week (will be there Thursday thru Saturday) and I believe the judging manuals are 50 or $55 per copy. Its a 1" plus volume loaded with information so I think its worth it. I have both the 67 and 68/69 Corvette Judging Manuals.

[Steve Shauger]

The unrestored Camaros that I've owned and Vintage Certified have had remnants of flat black paint. As been mentioned the machine surface operation was done after paint and should be bare/natural.

[ZLP955]

Steve that's an interesting observation. Is it your opinion that the paint was flat from initial application, or possibly a higher gloss that has been lost over the years to appear flat today?

[KurtS]

It's pretty flat, via the protected confines of Corvairs.

[ZLP955]

Thanks Kurt

[Dave Siltman]

Kinda funny how things escalate incorrectly. How many times have you seen chalk marks and such that are totally bogus and incorrect? My theory is someone had a car at a show that had a nice presentation albeit technically "wrong". Then, onlookers gawk at the car, go home and make/change their car to appear like the one at the previous show....and then another group sees THAT car at cruise night and the snowball effect gets started. Who was the first person to INCORRECTLY install the dreaded FORD fan sticker on a CHEVY fan shroud? See what I am getting at here??

[TRLAND]

Kinda funny how things escalate incorrectly. How many times have you seen chalk marks and such that are totally bogus and incorrect? My theory is someone had a car at a show that had a nice presentation albeit technically "wrong". Then, onlookers gawk at the car, go home and make/change their car to appear like the one at the previous show....and then another group sees THAT car at cruise night and the snowball effect gets started. Who was the first person to INCORRECTLY install the dreaded FORD fan sticker on a CHEVY fan shroud? See what I am getting at here??

That's why this site and forum are such a great resource.

[stovebolt]

This photo, from the Chevrolet Quality Brake Service pamphlet dated July 1968, confirms what was said previously, that the master cylinder was painted black and prior to machining.

[HawkX66]

This photo, from the Chevrolet Quality Brake Service pamphlet dated July 1968, confirms what was said previously, that the master cylinder was painted black and prior to machining.

Is that a photo or an artist's rendition?