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Registered
Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,787
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What are M Callipers?
Just wondering what are M Callipers?
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05-13-2005, 09:19 AM
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Administrator
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They are the original 914-6 brake calipers, as well as being the ones used on the 911 from about 1969 through 77 or thereabouts. Their mounting bolts are only 3" (on-center) apart, and they are made of steel and so a magnet will stick to them. You need 911 M struts or 914-6 struts to use these.
The "S" calipers are aluminum (lighter, better heat dissipation, more prone to flex, magnet will not stick) and have a 3.5" mounting bolt spacing. They were an option on 911s from about 67 up through 79 or 80. The "A" calipers are steel and have a 3.5" bolt spacing. They were the non-S option on 911s from the end of the "M" calipers up until 89. --DD
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Pelican Parts 914 Tech Support A few pics of my car: http://www.pelicanparts.com/gallery/Dave_Darling |
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05-13-2005, 10:20 AM
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Banned
Join Date: Feb 2003
Posts: 1,207
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Some pictures of the calipers here
http://www.pelicanparts.com/techarticles/914_five_lug_conversion/911_front_suspensions.htm |
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05-13-2005, 10:31 AM
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Registered
Join Date: Dec 1969
Location: chula vista ca usa
Posts: 5,703
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Dave is right, but left out a couple of things. The M calipers are for vented or thick rotors so will not work on the solid rotor that is on the 914 4s. They can be used if you get a set of the 4 bolt alloy hubs that Brad and Mueller made up and then the rotors are replacable too. I have a set on the race car and they are great. There was also a guy that had some spacers for the BMW calipers so they could fit over the vented rotors but they are not available any longer.
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05-14-2005, 08:14 AM
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74 Porsche 914 2.0 
