Help with Brake Upgrade, Rear Vented rotors Options

[Racing916]

hello,

I am currently upgrading my 914-6 to vented rotors. My hope was to take a Front "M" caliper and mount it on the rear using the 911 (69-83 Rear) vented rotors. I mock fitted the caliper and rotor and it looks like I need to place a small spacer between the caliper and the mount on the rear trailing arm (not a problem) The issue is the 911 rotors get larger as you get closer to the brake surface and rub on the "M" Calipers. Has anyone else had this issue? I realize they are larger for the parking brake, is there a parking brake delete option? 914-6GT vented rotors, suppliers?

Thanks for any help, back to the drawing board!

Steve

[Eric_Shea]

1969 through 1983. The 84-89 have larger pistons and I would not recommend them.

Rebuild kits are in stock. I've got the caliper 1/2 o-rings as well.

Oooooooooooops, forgot: I can't stress this enough; The stock "biasing valve" is NOT. It is a saftey shut-off valve that comes into the system at 535ftlbs. In a panic stop this shuts the rears down and slowly brings them back into the system preventing them from locking and causing a catastrophic spin.

Until the point where the panic stop is noticed, this valve ACTS LIKE A "T". It does not bias anything. The pistons and pads in a 914 are properly biased from the factory. This is just one of the many reasons I recommend staying with factory biasing options like:

43/33 -or- 48/38

This is also why I never recommend removing this valve (anymore... there was a time when we were all spouting the virtues of a "T")