rear "V-caliper" vs. "M" caliper, please jump in Eric Shea |
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rear "V-caliper" vs. "M" caliper, please jump in Eric Shea |
Wes V |
Aug 12 2008, 10:28 AM
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#1
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Member Group: Members Posts: 482 Joined: 11-October 07 From: Los angeles Member No.: 8,211 |
In the process of converting to 5 lug and also rear vented rotors, there appears to be two ways to go about it. Both have been explored and written about by Eric Shea over the years. (Ya, I've done a lot of searching and reading)
One is the usage of a late model 914 rear caliper with spacers placed in the body, to get the needed clearance for the vented rotor. (as I read it; a late model ATE caliper is used and not a rare 914/6 caliper) A spacer is required between the brake rotor and hub (moving the rotor and wheel outward). The rotor (911SC) has to have it's diameter shaved down 4mm) The parking brake cable just hooks up as stock. The other option is to use the "M" caliper from a 911 and also the parking brake assembly. Mounting the parking brake assembly requires grinding and welding on the housing. Hooking up the parking brake cable requires fabrication, but is possible (and can be found by searching this site). Now I can think of plus and minus points for both, but I'd like to hear from others. Wes Vann |
davep |
Aug 12 2008, 03:48 PM
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#2
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914 Historian Group: Benefactors Posts: 5,152 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
I don't know who developed it first, but I have been selling kits for V-calipers for over twenty years. I've got one set ready to go on a friends car as soon as he brings it to me. It certainly adds a little extra weight, and takes a bit more power to spin up. However, most 911's came with vented rotors front and rear, so if you have more than 120 HP, it probably is a good idea to think about the extra cooling the vented rotor provides. I don't think that an emergency brake is optional, and I believe that most motor vehicle authorities and insurance companies agree. It is nice to have bigger pistons and bigger pads in the rear to complement the vented rotors, however 914/6 calipers are very pricey, and the 911 calipers require an emergency brake solution. Most people find that the 914/4 caliper is adequate in moderate HP vehicles, especially if the proportioning valve is replaced or readjusted.
Notice I refer to the emergency brake, it doubles as a parking brake but that is just a bonus. |
Wes V |
Aug 12 2008, 04:30 PM
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#3
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Member Group: Members Posts: 482 Joined: 11-October 07 From: Los angeles Member No.: 8,211 |
Here is a link to a page showing various solutions to the parking brake hook-up when using the "M" caliper;
link to 911 parking brake hook-up I personally like what Larry Hubby did, as shown in page two. Wes |
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