911 Calipers, What calipers are these? |
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911 Calipers, What calipers are these? |
Olympic 914 |
Aug 7 2013, 02:08 PM
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#1
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Group: Members Posts: 1,671 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States |
I just got a front suspension off of a 76 911 that was being parted out. he told me it had a stock front end and what with just taking it off the car I didn't check the calipers closely... not that I would have been able to tell what they were anyway. (IMG:style_emoticons/default/blink.gif).. the guy I bought them from was not the builder of the car, he just bought it at an insurance sale for some parts he needed for his 911 and was selling off the rest.
So I get them home and while cleaning everything up I decide to measure the bolt spacing and it is 3 1/2 ... I thought the 76 had the 3 in calipers. but with everything else that was changed / upgraded on this car I am not surprised. So any of you brake gurus out there have an idea of what these calipers are? Whatever they are I guess its what I will be using.... (IMG:http://www.914world.com/bbs2/uploads_offsite/imageshack.us-13287-1375906115.1.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/imageshack.us-13287-1375906115.2.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/imageshack.us-13287-1375906115.3.jpg) |
Vysoc |
Aug 7 2013, 02:46 PM
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#2
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Vysoc Group: Members Posts: 586 Joined: 27-August 09 From: Young Harris, Georgia Member No.: 10,737 Region Association: South East States |
I think those are the "M" which would have been from 74 well into the SC's.
My 1980 911 SC had the same calipers, if they are not the "M" they are probably the "A". I am sure Eric will weigh in and then we will all know. FWIW. Vysoc (IMG:style_emoticons/default/flag.gif) |
toolguy |
Aug 7 2013, 03:45 PM
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#3
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Senior Member Group: Members Posts: 1,268 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
M calipers are from 914-6 and 911T with 3 inch spacing. A calipers are 3.5. . the pad area for an M caliper is just about the same as a 914-4, but you gain vented rotors.
corrected. . thanks. . |
Dave_Darling |
Aug 7 2013, 04:17 PM
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#4
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
I think you have M and A reversed, there, toolguy.
There's no crossover; I remember S calipers having a crossover tube. (Or two?) They look like steel. If a magnet sticks, they are. And that would mean they're A calipers. --DD |
Olympic 914 |
Aug 7 2013, 04:57 PM
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#5
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Group: Members Posts: 1,671 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States |
the pad area for an A caliper is just about the same as a 914-4, but you gain vented rotors. They look like steel. If a magnet sticks, they are. And that would mean they're A calipers. --DD They are steel, the rotors are 20mm and the pads are much larger than my stock 914-4 calipers have. They resemble this pic I took from a thread that Eric of PMB posted and showed as being A calipers, (IMG:http://www.914world.com/bbs2/uploads_offsite/imageshack.us-13287-1375916248.1.jpg) http://www.914world.com/bbs2/index.php?showtopic=105728 I also have the Boge struts, and after more research I am also leaning towards them being the A calipers, which are heavier but I guess they will do..... |
r_towle |
Aug 7 2013, 05:37 PM
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#6
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Custom Member Group: Members Posts: 24,577 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
They are the small yellow ones
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chad newton |
Aug 7 2013, 10:25 PM
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#7
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Member Group: Members Posts: 110 Joined: 26-August 11 From: behind the red curtain Member No.: 13,491 Region Association: None |
They are a. I had to change my post. A's are steel 3.5.
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Eric_Shea |
Aug 8 2013, 06:28 AM
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#8
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Big heavy A-Calipers. The heaviest caliper Porsche ever put on a 911. Basic sedan caliper of the day. To be found on Mercedes, BMW, Alfa, Ferrari and Porsches.
Early A-Calipers had three fluid inlets cast into the back half. Only the bottom one was tapped. That's a much later suspension though. Notice the pad sensor tabs mounted to the strut tube. |
914Sixer |
Aug 8 2013, 08:14 PM
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#9
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914 Guru Group: Members Posts: 8,886 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Eric, nailed it as usual!
(IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/pray.gif) The quick spot on those A calipers is where the hard line comes in. |
pdlightning |
Aug 10 2013, 09:35 PM
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#10
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Member Group: Members Posts: 207 Joined: 4-February 11 From: Santa Clarita Member No.: 12,660 Region Association: Southern California |
Eric, nailed it as usual! (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/pray.gif) The quick spot on those A calipers is where the hard line comes in. Eric also nailed it when I got my rear V calipers from him. They are beautiful. Thanks Eric ,again! |
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