: rear disc swap
Nov 21st, 00, 05:02 PM
well here i am again asking about disc brakes i finally got my front spindles i will be running 69 brakes on the front of my 67 i was given rear disc rotors and brackets off a 78 or so 10 bolt will they work on a 67 10 bolt i know i will have to get a different prop valve and such any opinion is appreciated
1967 rs camaro tahoe turquoise
Nov 22nd, 00, 02:27 AM
The rear disk setup you have must be off of a 79-81 TA. Camaro's didn't come with factory rear disks until 82. (I know about the JL8 guys but we are talking newer here) Yes this setup is a bolt on to your 67 10 bolt or even a 12 bolt as I have them on. You will need a master cylinder for the 79-81 TA with four wheel disks also. I used a adj pro valve from Summit racing due to its simplicity and adjustability. Do a search as I believe this has been discussed in depth in the past. If you run into issues just post them
Nov 22nd, 00, 01:10 PM
68SS I've read the various post on this in the past, and am still confused. Here's my question I currently have a disk brake setup off a 72 Nova. One, can I use this master cylinder and proportioning valve. Two, if not do you use a proportioning valve at all (besides the adj one). I guess I'm a little confused how how exactlty you plumb the lines.
Here's my best guess tell me if I'm right. You use a 79-81 master cylinder (or can any other be used). Front brakes are plumbed direct from the master to the brakes. Then the rear line has the adj. proportioning valve between the master and where it splits. Is this correct.
Nov 22nd, 00, 01:41 PM
RickB1B, Are you adding just the front disk from the Nova or is that what is on your car now and your adding rear disk? If your adding the front disk from the Nova I believe everything from the Nova will work on your Camaro. If you adding rear disk you need to use a master cylinder from a car that has four wheel disk, preferably the car the rear disks came from. In this case the TA master cylinder will bolt righ on to the booster. The adj valve I got from Summit only has one inlet and one outlet which gets plumbed into the rear line after the master cylinder. For alot of good info see David Pozzi's (a member here) website. http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm Most if not all your questions will be answered there. Feel free to ask more. I'm away from computers until Monday, Happy Thanksgiving!
Nov 22nd, 00, 02:52 PM
Sorry I should have said I already have the front disks on the car. What I am looking at is adding rear disk. I'm just wondering what to do with the proportioning valve which is currently on the car.
Nov 23rd, 00, 02:50 PM
Just to verify...
I can put the rear disk calipers and rotors from a 79-81 TA on my 67's 10 bolt 8.2 without cutting/welding?
If that's good info, that rocks (I already have Wilwood front disks, but that's expensive to get the rear setup also).
Need master cyl anyway, so no loss there.
If it does bolt up that way, do the e-brakes work too there? That'd be great :)
67 Camaro Basket Case
69 El Camino SS396 - now with 500,000 miles!(Daily Driver)
Nov 24th, 00, 02:02 AM
Does anyone know the casting # or part # of a 79-81 TA master cylinder. I need one for my 67 4wheel disc conversion and want to make sure I am getting the right part. Also what about a corvette master cylinder? Would it work as well?
69 rallye green X77 Z/28,1967 SS 396 Conv. 1974 c-10 454 swb
Nov 25th, 00, 04:36 AM
I couldn't see any casting #'s on my 79 TA master cyl.
Nov 25th, 00, 09:09 AM
Well I twisted my eyeball sideways and found 18001678 1.125
on the master cylinder.
Nov 26th, 00, 05:40 AM
How do I hook up the emergency brake cables & have a working emergency brake when changing over to the rear disc brakes off of a Trans Am? Do I need to get this off of the Trans Am too or will my old set up work?? Thanks
Nov 27th, 00, 02:35 AM
RickB1B, If you added the front disks then you probably only have a junction block and not a pro valve. The junction block has the brake warning light hookup. Is that what you are looking at?
Derekf, The rear disk setups are direct bolt ons to the 10 bolt and 12 bolt rears with no cutting or welding. Just pull out your axles, unbolt the backing plates with all you drum stuff (four bolts) and bolt on the disk backing plates, install the axles.
I bought the rear emergency brake cables from a 79-81 TA with rear disks and the rest of the cables are original 68. The TA cables fit the factory brackets but the inner cable inside the sheilding on both sides is way too long. I cut the inner cables down to the length needed then welded the end back on the cable. Hard to explain but a simple proceedure. Can't check the casting or part number right now but the local parts store had no problem getting one and it was cheap.
Nov 27th, 00, 05:58 AM
The e-brake cables are specific to the 79-81 application, and from what I understand, are no longer available. Make sure the donor car has a good set.
Be sure to get an '81 master cylinder. I was told that '81 was the first year GM used the aluminum master cylinder with plastic fluid reservoir. It will save you at least 10 pounds over the cast iron version.
Pearl blue & white 69 Camaro with supercharged 350, Tremec TKO, and 3.73 12-bolt
See my website updated 9/01/00 at:
Nov 27th, 00, 08:54 AM
Did they go to the aluminum one for the four wheel disk applications also or just the regular TA's? As far as the rear brake cables they are disc. from GM. I tried a couple small local stores with no luck including the Auto Zone chain with no luck. Advance Auto Parts chain could order them no problem and cheap. I might have even saved the package just so I knew the part numbers. I believe it was a Bendix number.
Nov 27th, 00, 03:26 PM
when I examined the parking brake cables from a '79 Seville at the salvage yard they looked like they would fit right in. BUT I haven't tried to get a pair and see for sure.
Nov 29th, 00, 03:35 AM
Hey can anyone give me a phone # or web address to help me find the rear disc brake assembley off of a 79 thru 81 Trans Am for my 67 camaro, or if you have this for sale let me know. According to my local Carquest Store the calipers off of a 79 Cadallac Seville are the same as the ones on a Trans AM, but the rotors are different, so I guess the backing plates are also different..
[This message has been edited by johnnyr (edited 11-29-2000).]
Nov 29th, 00, 07:58 AM
68SS, I helped a friend take the rear end and other disc brake components out of an 81 T/A and it had a GM aluminum master cylinder in it. We got the stuff from a guy with a Firebird junkyard and he was the one that told me only 81s used the aluminum master cylinder.
Thanks for the info on the parking brake cables. The driver's side cable on the rear we got was frayed and we were told that they were no longer available. It would be great if you still had the part numbers.
Nov 29th, 00, 08:25 AM
Gheatly, Thanks for confirming the master cylinder. I wish mine wasn't new but I will keep it in mind for the next time. I wrote myself a note so hopefully I will remember to see if I have the numbers. I know I cut the label off the package to save them and it wasn't too too long ago so it shouldn't be hard if I can get my brain to remember to check.
Nov 29th, 00, 04:23 PM
Engineered Components Inc.(ECI) have new kits for this.
$459 for the Seville stuff and $499 for the Camaro/T-A stuff.
Might check them out.
And the ends of my stock '67's E-brake will fasten right to the '80 Seville rear calipers!!!
I know, I'm still hassling over my caliper brackets for my big brakes!! Mainly because of lazy-a-s more then anything else!!!
I got tooo much stuff going onwith my car at one time. Theres no excuse for it, shoulda been done before cold weather!!! pdq67
Nov 30th, 00, 06:45 AM
Ok I found the label for one side and I think its the right side. The part number is C92947. I believe the manufacturer was Tru Torque (that part of the label was missing). They are made in the USA and were very good quality. The other numbers on the laber were Bendix-C1044, Wagner-F129205, and Raybestos-BC92947. Strange that they would put the other companies part numbers on the label (if thats what they are) unless this company makes them for the other ones.
Nov 30th, 00, 02:47 PM
The backing plates for the seville have a dust shields bolted to them, otherwise they are the same.
The Seville rotors have a 5 X 5" bolt pattern the T.A is 5 x 4.75" like the Camaro. They can be used by redrilling to the new pattern. I tried this on a drill press and it is not accurate enough. It needs a vertical mill to do the job.
The center hub I.D For Seville rotors is also larger. I had to machine spacer rings to properly center the disc on the axle. I'm not sure about T.A rotors.
Dec 1st, 00, 12:35 PM
The '80 Seville disc rotors are the same bolt pattern as first gen and fit except for minor axle od and hub clean up on the lathe. Plus they both mount to the "back" for less/no clearance hassle.
I started to use them and didn't realize that they were only 10.5" in diameter. I went with 11.75" Camaro rotors instead to better match the 13" Vette front rotors I have on. I redrilled my Cad brackets out 5/8". and they are fine except need some filler metal welded in. pdq67
PS., I have almost come to the conclusion to use my original drum brake spindles instead of the disc spindles and make a spacer mount and adapt the top half of a circle track bracket to it. Just bolt together with grade 8 bolts, plus NO welding involved!!!
I've sent a letter to Mid-Illinois Caliper to try to get the application for the 1/4" wider big single piston truck caliper with the correct hose bolt threads David has mentioned and am considering using them.
Dec 1st, 00, 02:49 PM
Take a look at a 71 to 78 chev or gmc half ton pickup front caliper.
You can also get a circle track aluminum caliper but it may flex too much.
There are two piston iron circle track calipers that should work well. Just watch the width.
The truck caliper is for the mid 70's Corvette 1 1/4" thick rotor.
If you are using a late Corvette rotor, you need a different caliper.
Check my web page for First Gen Camaro suspension info:
David's Motorsports page (http://ourworld.compuserve.com/homepages/David_Pozzi/)
First Gen Suspension Page (http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm)
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer
Dec 1st, 00, 03:58 PM
You never cease to amaze me. You know sooo much.
The '88 Vette rotor is about 1.150" thick. It will make me have to sand about .040" off each pad to fit the big single piston Camaro caliper on.
Thats why I'm going to use the truck one thats .25" wider. If I have to, I will shim a pad with an old pad plate.
I have already done my homework on how to make the caliper brackets. I just need access to a metal cutting bandsaw.
You want to go in partners making them so the guys won't have to use disc brake spindles??? And I'm serious as a heart attack!! pdq67
Dec 2nd, 00, 06:49 AM
I have the bandsaw. Come up to Chicago and you can use it, Ironically, today I'm in St Louis.
Dec 2nd, 00, 11:10 AM
Thanks for the invite. Let me think on it for a bit. I just e-mailed David at home asking about some details and also to tell him I just got back from the Parts Store with a '72 1/2 ton truck rebuilt caliper.
I'm going to mock up my drum spindle and drum hub that I have the 13" '88 Vette rotor on and measure it and lay out a sketch of what a billet bracket would have to be like. Then at this stage, I will be ready to get some CRS. and start "whittling". pdq67
THIS IS THE PLAN:
13" Vette rotor mounted on a stock drum brake bare hub that has needed longer wheel studs installed.
'72 1/2 ton truck stock big single piston caliper.
A stock drum brake spindle.
A billet bracket to marry everything together right.
Dec 12th, 00, 01:53 PM
I thought about your invite to use your bandsaw. Heck, it's just too far. If I was still gunning refractories, I would stop by on one of my installation trips. But since I'm outta that, thank God, I really don't have the time.
I called Harbor Freight Tool and ordered a cheap ($109.99) Chop-Saw this AM. It will take a while top get to me but that will give me something to look forward to.
Again, thanks for the invite. I'm sure we will run into each other at a show sometime. pdq67