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Need a little brake help
I need to rebuild my brake system on my 76. It has new master cylinder, but my caliper dust boots are shot, the brake hoses need to be replaced. My question is what calipers do I have? I think they are M calipers. The listings I find for my car say it has S calipers, but mine are steel, not Aluminum. The M calipers are shown in the catalog as 74-75. I doubt they are a mod that the previous owner did as he modded nothing on the car. Is there a way to figure out what the are? Also, from my previous reading here I should not separate the caliper halves as there are no O rings available? It that still true? I also need pads, I think that Mintex organic seems to be the way to go. Any input there. PO put semi metallic pads on and the pedal effort is pretty high, but it still stops well.
Thanks!
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76 911S Targa An ex F1 driver, and Porsche fanatic (my stepfather) once told me that if you listen very carefully on a quiet night you can actually HEAR Porsches rusting in the garage! |
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10-05-2011, 09:12 AM
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You should have A calipers in the front and M calipers in the rear. Both are steel. The A calipers in the front will have a 3.5" bolt spacing (where they bolt onto the strut). S and M (did I just type that?
 ) calipers have 3" spacing...Most all typical pads, Textar, Jurid, etc. are perfectly fine. I've used a huge variety and just bought a set of MetalMasters from our host for street use due to their acceptable behavior and low dust, etc.
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Mike 1976 Euro 911 3.2 w/10.3 compression & SSIs 22/29 torsions, 22/22 adjustable sways, Carrera brakes |
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10-05-2011, 11:30 AM
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Thanks IROC, I went in to the parts break down a different way and got that info. I do have A calipers.
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76 911S Targa An ex F1 driver, and Porsche fanatic (my stepfather) once told me that if you listen very carefully on a quiet night you can actually HEAR Porsches rusting in the garage! |
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10-06-2011, 08:27 AM
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Join Date: May 2003
Posts: 3,346
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Don't split the calipers. Push the pistons out with the brake pedal. You can remove the brake pads and push the pedal to get the pistons sticking out (hope they won't fall all the way out). You can keep most of the fluid in the lines and make it easier to bleed later if you push the brake pedal down an inch or so and hold it there with a stick. This will keep the fluid from draining out. You will not be able to move the pistons with the pedal down until you open the lines.
-Andy
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72 Carrera RS replica, Spec 911 racer |
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10-06-2011, 08:34 AM
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Thanks Andy,
I am replacing the lines, but I have a motive power bleeder. I have not used it on the Porsche yet, but it works very nicely on other cars and has saved me a bunch of time on them.
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76 911S Targa An ex F1 driver, and Porsche fanatic (my stepfather) once told me that if you listen very carefully on a quiet night you can actually HEAR Porsches rusting in the garage! |
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10-06-2011, 08:37 AM
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1976 Targa
1976 Porsche 911
