1967 Chevelle Factory Disc Brake J52 Questions - Chevelle Tech
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post #1 of 15 (permalink) Old Dec 4th, 19, 7:29 AM Thread Starter
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Oliver
 
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1967 Chevelle Factory Disc Brake J52 Questions

What style master cylinder did the 67 Chevelle's with J52 factory disc brakes comes with? The square style the drum brake cars had or the more rounded style? Did the booster have an A/C delco marking in 67 or not? Also, if you did not want to track down all the parts, would you think this inline tube kit would be a ok compromise? I know it does not have the 2 piece rotors but, other than that it looks pretty close. I would also appreciate any pictures of factory J52 cars. Tried google and forum search and there is not much out there.

https://www.inlinetube.com/products/dbk6804

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post #2 of 15 (permalink) Old Dec 4th, 19, 7:56 AM Thread Starter
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Oliver
 
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Here are two cars that both claim to be J52 optioned. One has a delco stamped booster with round master and the other has a plain booster with square master.

https://www.barrett-jackson.com/Even...-HARDTOP-15367

https://www.mecum.com/lots/SC0518-32...t-chevelle-ss/

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post #3 of 15 (permalink) Old Dec 4th, 19, 7:56 AM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

The larger style with dual bale wires was used with the 4-piston disk brakes. Bendix made the master cylinder but I have seen Delco on the cover.

(Note: the example shown below is from a '67 Z28)
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post #4 of 15 (permalink) Old Dec 4th, 19, 12:38 PM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Attached are pix from a '67 J52 car. Original 9820 boosters are hard to find, 346 SA stamped masters a little easier. I am no help on repro stuff.
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A few '67s and a '66
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post #5 of 15 (permalink) Old Dec 4th, 19, 9:08 PM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Bill's pic above shows the correct parts. The face of the Boosters were not stamped with Delco Moraine in 67. The M/C was made by Delco Moraine, not Bendix. Note also that the holdoff valve (the little round thing with the large hex nut on the face) was different for 67 (and I think also 68) from what is pictured in the inline tube link above, which is a 69 valve. The 67 (and 68?) is a smaller casting. Someone sells a fairly correct repro of the 67 valve, but I don't remember if it is inline or rightstuff.

Below are pics of my factory L78 elcamino with J52 brakes. Finish on the booster is correct, not shiny like the repros and lots of replated ones. Black MC, black holdoff valve, and black calipers, all with bare machined surfaces, is correct ... for 67 (I'll add that since that's the year we're talking about, and so no one with other years gets mad about it).
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post #6 of 15 (permalink) Old Dec 4th, 19, 11:52 PM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Thanks Jeff for explaining what is TOTALLY correct! (for '67!)
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Last edited by 67since67; Dec 5th, 19 at 12:15 AM.
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post #7 of 15 (permalink) Old Dec 5th, 19, 8:06 AM Thread Starter
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Oliver
 
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Thank you for the great information. Hard to believe this information is not already readily available on the internet. That’s why I love this site and community. Beautiful El Camino by the way. The bummer is Inline tube called me and said they do not have the calipers and cannot track any down from their suppliers. Why they still list the 4 piston kit on their site is beyond me. Seems almost like false advertising. I place my order for their 1967 GM dual piston kit and some shocks/brake and fuel lines during their cyber Monday sale. Not sure what to do as they said they will try to track down calipers but, may have to charge me more for them depending on how much they find them for. Inline tube claims the issue is no one is turning in their original caliper cores and choosing to hang on to them instead.

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post #8 of 15 (permalink) Old Dec 13th, 19, 2:00 AM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

I have a 67 & 68 That are all original with J52 option both Fremont cars and They Both have the same exact holdoff valves and brackets.Hope That helps anyone with a 68 as you 67 Dialed in. I am Looking to buy a SA stamped master if anyone knows of one.Thanks

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post #9 of 15 (permalink) Old Dec 13th, 19, 11:16 AM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Hope you guys donít mind a slight detour...

My Ď67 has manual drums all the way around and Iíd like to improve the braking.

Iím considering a Baer 4-wheel system but this thread caught my eye. Since my car is basically stock, a J52 conversion makes sense.

How hard is it to source the J52 components? (I did see the lack of calipers comment above.)

Or should I just stay with an aftermarket solution?

TIA,

Mark


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post #10 of 15 (permalink) Old Dec 13th, 19, 11:22 AM
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Keith
 
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Quote:
Originally Posted by MFortie View Post
Hope you guys donít mind a slight detour...

My Ď67 has manual drums all the way around and Iíd like to improve the braking.

Iím considering a Baer 4-wheel system but this thread caught my eye. Since my car is basically stock, a J52 conversion makes sense.

How hard is it to source the J52 components? (I did see the lack of calipers comment above.)

Or should I just stay with an aftermarket solution?

TIA,

Mark
Find stock 68-72 Disk brake spindles and brackets and make your own setup with reman calipers from the auto parts store. You can do this for under 250 Then use stock 67 lines m/c and pressure switch. Thatís why I did and my car stops on a dime time after time

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post #11 of 15 (permalink) Old Dec 13th, 19, 11:23 AM
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Keith
 
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Quote:
Originally Posted by burlyboysinc View Post
I have a 67 & 68 That are all original with J52 option both Fremont cars and They Both have the same exact holdoff valves and brackets.Hope That helps anyone with a 68 as you 67 Dialed in. I am Looking to buy a SA stamped master if anyone knows of one.Thanks
Try Lone Star Calipers

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post #12 of 15 (permalink) Old Dec 13th, 19, 11:48 AM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Ames has the calipers but... $379 EACH including core charge of $200.
They also have reproduction calipers for $115 and no core charge.

https://secure.amesperf.com/qilan/De...A&web_access=Y

https://secure.amesperf.com/qilan/De...A&web_access=Y

Ed

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post #13 of 15 (permalink) Old Dec 13th, 19, 1:24 PM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Quote:
Originally Posted by OO52 View Post
Ames has the calipers but... $379 EACH including core charge of $200.
They also have reproduction calipers for $115 and no core charge.

https://secure.amesperf.com/qilan/De...A&web_access=Y

https://secure.amesperf.com/qilan/De...A&web_access=Y
Dumb question: Are the RH & LH calipers the same? The link for the reman caliper states 'RH' while the new one is 'LH'...


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post #14 of 15 (permalink) Old Dec 13th, 19, 1:51 PM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Calipers are opposites, lines and bleeders need to be in the rear.
I sold a complete changeover from a '67 Malibu not too long ago. Took awhile to find an interested buyer, but he was very happy to get them. They are very scarce, expensive to rebuild, and troublesome units. They also are unique to the a-body. I'd bet a lot of them were scrapped in favor of the single piston units.
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post #15 of 15 (permalink) Old Dec 13th, 19, 4:13 PM
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Re: 1967 Chevelle Factory Disc Brake J52 Questions

Yes they are different. I used a description of just one to get the idea across.

496L/496R are the Ames part numbers for remanufactured calipers.

470L/470R are for the reproductions

Ed

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