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Old Feb 24, 2016 | 01:47 PM
  #16  
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NYC993
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From: Nothern NJ
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Originally Posted by Bill Verburg
Yes but you'd be better off w/ either a full 993RS set which is the same as 994C4S/tt except for the rear calipers

or w/ just using the big reds in front and retaining the stock rears. You can get black calipers by using the 928S4 version, Though the feeds and bleeds would need to be swapped.

The reason either of the above is a better choice is brake bias

You also need to replace the caliper bolts but they should be replaced anyway.
I know that this is not the right thread, but I would like to understand your comment. Either RS or stock? Why would either produce better brake bias but not the tt/c4s calliper? I noticed that I do get pretty long life out of rears (front is under 50% while rears are barely worn).
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Old Feb 24, 2016 | 03:56 PM
  #17  
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Bill Verburg
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Originally Posted by NYC993
I know that this is not the right thread, but I would like to understand your comment. Either RS or stock? Why would either produce better brake bias but not the tt/c4s calliper? I noticed that I do get pretty long life out of rears (front is under 50% while rears are barely worn).
The 993tt rear calipers use particularly small pistons @28/28 which the bigger 322mm rotor can't compensate for

here are the #s
993RS/tt/C4S front 36/44 on 322 which develop 2306nm of brake torque @70bar line
993RS rear on 322 which develop 1618nm@70bar for a brake bias of 1.426

993tt rear 28/28 on 322 which develop 1155nm@70bar for a bias of 1.997

993RS front w/ stock 993 n/a rear which develop 1390nm rear for a bias of 1.659, this is similar to but slightly better than a 964RS 2381/1390 1.713

just for comparison
'69-83 911s/SC 1444/969 1.491
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Old Feb 24, 2016 | 04:29 PM
  #18  
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JDHertz11
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From: Miamah, La Florida
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Originally Posted by NYC993
OP, you might want to check sunset prices for new big reds, that might explain why you still have them.
I have and they're about $3000.00 with shipping. So buy mine and save:
  • Almost 15%
  • $400.00 total
  • $100.00 a caliper

Not a bad deal if you're ok with the imperfections. And Ive actually had more than one offer at $2600.00 more or less but I was not available so I lost the sales.
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