Help with Brake Upgrade, Rear Vented rotors |
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Help with Brake Upgrade, Rear Vented rotors |
Racing916 |
Nov 16 2009, 08:00 PM
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#1
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Member Group: Members Posts: 341 Joined: 16-October 04 From: Binghamton, NY Member No.: 2,959 Region Association: North East States |
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 |
Feb 24 2010, 09:56 AM
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#2
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
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") |
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