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993 Big Reds with 44mm / 40mm Pistons

 
Old 02-11-2013, 08:12 PM
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95993CAB
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Default 993 Big Reds with 44mm / 40mm Pistons

Good Afternoon Guys –

I have an interesting brake question. I purchased a set of used Big Reds for the front of my car and new 993RS rear calipers. I purchased a rebuild kit for each piston in the Big Reds – 44mm and 36mm. The 44mm pistons fit without problem. The 36mm pistons were way too small for the cylinder bore. I measured the piston that came with the calipers (remember these were purchased used) and they measured 40mm. I just received four (4) 40mm pistons and rebuild kits and they mate perfectly with the cylinder bore. I am unsure if the PO had these custom machined or ??? Anyone have an idea if this set up was available from Porsche? I appreciate the feedback and help in my search.

Sincerely,
Michael Bishop
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Old 02-11-2013, 08:39 PM
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Bill Verburg
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Originally Posted by 95993CAB View Post
Good Afternoon Guys –

I have an interesting brake question. I purchased a set of used Big Reds for the front of my car and new 993RS rear calipers. I purchased a rebuild kit for each piston in the Big Reds – 44mm and 36mm. The 44mm pistons fit without problem. The 36mm pistons were way too small for the cylinder bore. I measured the piston that came with the calipers (remember these were purchased used) and they measured 40mm. I just received four (4) 40mm pistons and rebuild kits and they mate perfectly with the cylinder bore. I am unsure if the PO had these custom machined or ??? Anyone have an idea if this set up was available from Porsche? I appreciate the feedback and help in my search.

Sincerely,
Michael Bishop
36/40 was what was used on 964 fronts

all 993 whether whether Big Red or normal were 36/44

a pic would help a lot
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