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)
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.
If we measure off the 69 hub inboard seal face to the original rotor inboard surface, we get about22 mm. We know both hub and rotor have the same measurment here 67 or 69 hub. Rotors are the same dimention 67 or 69.
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.
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.
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.
I use Corvette calipers and rotors on my car (front and back)
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 !
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.
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!