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Registered
Join Date: Feb 2007
Location: Mexico City
Posts: 6
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1977 930 caliper pistons corroded
Hi, I'm rebuilding my 1977 930 brakes and noticed that the front caliper pistons are corroded so I need to change them, I'm assuming that the rears are in the same condition so I will also change them but so far I have only found the fronts at Pelican but have had no luck with the rears.
Does any body have an idea of where could I buy caliper pistons?. The P/N's I found are 911.351.918.00 for the fronts and 901.352.993.00 for the rears, are these OK. Regards Wmoon |
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09-23-2007, 06:49 AM
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Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,702
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how badly corroded are they? They might clean up with some fine steel wool and brake cleaner for you to better evaluate the pitting. I just cleaned up pistons from a 356 project that have not moved in 25 years. They looked bad but after the clean up, I only had one small area that needed buffing with a fine grit emery cloth. They now look brand new!
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Tony G 2000 Boxster S |
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09-23-2007, 07:01 AM
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Join Date: Feb 2007
Location: Mexico City
Posts: 6
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Tony,
Thanks fou your suggestion, the pistons have "deep" corrosion that both my mechanic and I believe is enough to justify new pistons front and rear. My 930 has a european spec. 1978 engine with 300 hp at leats, it flyes and I want to feel as safe as possible with my breaks. |
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09-23-2007, 07:08 AM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,485
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put some SC calipers on unless you really need the aluminum flexy ones for some reason.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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09-23-2007, 08:11 AM
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Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,702
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Quote:
These should certainly be readily available and inexpensive as well. Very good suggestion.
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Tony G 2000 Boxster S |
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09-23-2007, 05:20 PM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,485
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bolts right on.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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09-23-2007, 05:24 PM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Or, you could bolt on 3.2 Carrera 'wide-A' calipers and 24 mm thick rotors for a bit more thermal mass ...
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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09-23-2007, 05:37 PM
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Registered
Join Date: Jan 2002
Posts: 650
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Agreed. Those aluminum 'S' calipers flex like crazy. I have / had cars with them. If you want to retain them (for originality sake) Stomski Racing sells stainless brake pistons at $220 for 4 to repair them.
If you drive it hard, upgrading to the steel calipers (at a minimum) is the way to go. Tinker |
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09-23-2007, 08:35 PM
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