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Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Chassis Tech Forum -> Need brake rotors for your Disc brake 67-68 Parisienne? Here's a solution.
Post Info TOPIC: Need brake rotors for your Disc brake 67-68 Parisienne? Here's a solution.
cdnpont


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Need brake rotors for your Disc brake 67-68 Parisienne? Here's a solution.
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Had a nice visit this afternoon from CP member Cliff (oshawacliff), who has a gorgeous Oshawa 67 Impala FB.He's been trying to find replacement rotors as his car has the 4 piston disk brakes. He brought along the supposed 67-68 direct fit rotor from Ecklers he purchaced. What we discovered is that the Ecklers piece is an 11" rotor and does have a thinner cross section. Regardless of the fact Ecklers says it will fit (and it probably will on the B 67 spindle) it's probably too small in diameter for a 4100lb car. It's a A body part. And besides, the B 4 piston caliper pads will overhang the rotor about 3/8", which is crazy.

Taking some measurements, we discovered some encouraging news. When we separated the 67 two piece rotor, we found out that the rotor half of the 67 has the same dimentions as the 69-70. It appears to be the exact same casting between the two. A interesting fact I'd been wondering about.

Having a close look at 67 vs 69 hubs, we see that obviously the 69 is wider than the 67,and it has larger diameter bearings inner and outer, but it does share the same flange dimention in it's position relative to the 67. Also the same from inboard to inside hub flange. Same flange thickness. 69 appears taller.
Orginal 67 Disc brake hub (left) 69 Disc hub (Right)
4300815675_e7cc20294b.jpg 

When we go in and measure the distance from the inboard bearing race to the inboard seal face, they work out to be the same between 67-69. It works out to be about 13-14 mm.
4301563952_38c9866aa3.jpg


If we measure off the 69 hub inboard seal face to the original rotor inboard surface, we get about
22 mm. We know both hub and rotor have the same measurment here 67 or 69 hub. Rotors are the same dimention 67 or 69.
4301591814_8df3601a6a.jpg

We now slip the C3 rotor over the hub, and we get around...22mm. The same inboard measure of the rotor face between the slip over Vette, and the original mount from behind rotor. This tells us that within a couple of mm, the Vette rotor should slip over a 67 hub, and center in the original 4 piston caliper.
4301593178_027a02e96d.jpg

In conclusion, it's more than reasonable to assume that any 69-82 Corvette rotor will work as a replacement rotor on the 67-68 Big Chev or CP, just as it has been proven on the 69-70. Order 69 Corvette studs and you'd be good to go.

Cheers, Mark





-- Edited by cdnpont on Monday 25th of January 2010 08:33:06 AM

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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
Elroy


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Thanks Mark for a great article here. I have a friend with a 67 2+2 396 original disc brake car that is running drums because he needs a rotor. I will pass on this article !

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65wagon


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like to introduce my self, im 65wagon guy. just to hop into the conversation.You can use the rotors and brakes off of a pre 80s corvet. use the spindels too. The benefit is biggerberings and bolts for steering.

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Elroy


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Hi 65 wagon, welcome to the site. What part of the country are you from ? Do you have any projects or favorite cars? So you are suggesting to use the Corvette hubs, bearings and wheel studs along with the rotors to be sure , and the spindles will fit a b-body too ?

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65wagon


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You bet. THe corvette spindle is a direct fit offering the advantage of the bigger berings and 11.75in rotors

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65wagon


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Sorry ,Im from northern alberta.

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Elroy


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Thanks a bunch, I never would have guessed Corvette spindles would fit. Another northerner, you're in ! Actually I am central but tend to travel there almost weekly .

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65wagon


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im doing the converstion right now for stopping purposes. anything past 80 is a two footed
scarefest. and towing a trailer pray. any i got to log off time for work ill be on later tonight.

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cdnpont


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Hello 65' wagon. Let us know how your conversion is going!
Post pictures

I'm currently piecing together a disc brake setup for my 67', and at first I thought I'd stay with 67-68 Spindles. But Really, like you say, the 69 -70 bearings are really noticably bigger inside and out. So it's a no brainer.
So I'll start will a 69-70 Spindle... Vette or Impala drum. If a drum brake spindle, I'll simply cut down the upper brake backing plate boss to accept the 69 and up Vette caliper carrier bracket.
I'll use 69 and up Vette, not Impala disc hubs (deeper wheel centering surface on Vette) and 69 - 82 Rotors.
69 and up splash shields.
69 and up 4 piston calipers. O ring/stainless.

I'm running rallys (a must with the wide 4 pistons) so I'm ok there.
Add a Disc/Drum master, maybe a 71 and up big car proportioning valve and It might even work!

I made a post ages ago on using Vette rotors on 69 Impala hubs. Kind of dated, but nice pictures anyway.

Vette rotors on Impala hubs

I mostly just write this stuff so I can get it clear in my head.

Cheers, Mark

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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
65wagon


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Hi wagon guy here, thier is one problem the corvette calipers have small metal lines that conect to a bracket which your rubber flex line conects to. what i haven,t yet figured out is if i should use the vett setup or the camaro,impala. two different lines might have too break out the tubing bender any ideas.

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65wagon


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Use the early two pot round master for the disk drum with an ajustible propotioning valve u may need a risidual valve in the line to the rear breakes.

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Ben01


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A guy's. I got a 1967 Grande Parisienne 4 doors, i whant to remove the front drum and install rotor. I found spindel of a 1967 Parisienne 2+2 with 4 piston caliper but can't find the rotor's.

So if i read right i can use corvette rotor with stock caliper with 1 piston. Or is their a better way to install front rotor on my car.

    Thank's   Ben



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427carl


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I use Corvette calipers and rotors on my car  (front and back)biggrin



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67curves


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Elroy wrote:

Thanks Mark for a great article here. I have a friend with a 67 2+2 396 original disc brake car that is running drums because he needs a rotor. I will pass on this article !

        Elroy, here is a new 68 corvette rotor and my original rotor. As someone said awhile ago you can use this rotor but must put it on the outside of the hub not the inside. By doing that there is only 4 centimeters difference. I did have problems with the rim hitting the caliper with the rotor on the inside. I haven't tried this new rotor on the outside of hub yet to see if rim will hit. They are both 11.75 rotors.



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cdnpont


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Dave, there is now a stock behind the hub rotor available, Centric 120.62066. But as you say, the over the hub vette rotor might just create the offset you need to clear the caliper.

But will the over hub Vette rotor work in a 67-68 4 piston caliper application? Will it cente in the caliper? I've only ever tested on the 69-70 setup. If it does work, Vette is by far the cheapest way to go, with a ton of performace rotors available. Good option!

Welcome Ben01, if you have the entire 67 Disc spindle and the matching small bearing hub, to start I think this Centric rotor will work for you. I believe this behind the hub rotor to be the same part across 67-70, 4 piston and single caliper, with the only difference being the hubs, 67-68, 69-70. Understand that you'll need the caliper bracket and a unique steering arm to fit a single piston caliper on a 67 Spindle. The single piston bracket and arm are very difficult to find on their own. The best bet is to find an complete 69-70 single pistion setup, or peice together a complete 69-82 Corvette 4 piston setup from scratch. Fairly easy to do. See my Flickr page for GM Brake images. 

Do you have any shots of your 67 Gp Ben? Post them up if you do!

Cheers, Mark

6858395185_a2ea5684f8_o.jpg



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rebelrouser


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I did it the easy way- swapped everything up front to Corvette-C3-from spindle to rotor.They basically fell into place with no problems.I did the same for the rears as well but that took some doing on how to figure out the e brake system.I did eventually figure it out and what a difference it made in stopping power!!! It is a real impressive set up to see when all in place. In my opinion,well worth the time/money spent just to have the stopping power of a Corvette on a B body.What took me almost 4 months to accomplish,a guy could do it in a weekend or two at the most.

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Ben01


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Thank's for the info.


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oshawacliff


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Holy Mackeral 

Mark  That was 12 years ago in your basement workshop.   A good time was had and I believe we have helped a few members here.

Cliff

 



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cdnpont


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12 years. Imagine !

I think it's funny Cliff, when you read through the Impala forums, you still from time to time see it it quoted that you can use C3 REAR discs on your 69/70 Impala single piston setup. It was kind of a mistake that got into the first article I did. But I'll always know it's mine being quoted because of that well placed gaff.

They are the same discs C3 front and back, except the rears have an extra hole for parking brake adjustment in the hat... or something like that.



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4SPEED427


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I'm speechless, 12 years............ wow the time is slipping away. It's less than an hour till midnight but I fell like I should go out to the garage and work on my car!!!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Pontiacanada


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4SPEED427 wrote:

It's less than an hour till midnight but I fell like I should go out to the garage and work on my car!!!

 You better hurry:

The Weather Network - Doomsday Clock locked in at 100 seconds to midnight for third year in a row



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Prince Edward Island

'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.

oshawacliff


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Get going.... February only has 28 days this year.

 

No more procrastination eh!



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Cliff

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Like the larger type for my eyes. 

 

 
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