[s-cars] Big brake upgrade help

Kevin Day kday at ultrameta.org
Sat Jan 8 12:58:21 EST 2005


Hi all,

I recently took delivery of the ECS stage 2 big brake it.  I've got a 
bunch of questions and I'm hoping for some BTDTs.  

1) I have the "big blacks", not the "big reds".  As I understand it these 
   calipers are from the 928 GTS, and are identical to the 993tt calipers,
   except that they are configured for trailing (behind the axle) mounting.
   The ECS invoice has the cryptic phrase "Calipers do need swapped."  I
   assume they are talking about the leading/trailing issue.  However,
   the calipers appear to already be in the correct orientation for 
   leading-edge mounting.  Please see this picture for (at least what 
   I believe to be) the driver's side caliper:
   http://pictureposter.audiworld.com/66084/bigblack.jpg
   Please correct me if I am wrong!
   BTW, the boxes the calipers came in have the Porsche part number
   928 351 423 03.
   
2) I want to replace the bolts which attach the ECS bracket to the spindle.
   Is N 901 740 01 the correct Audi part number?  

3) Loc-tite on all the bolts?  What torque is recommended for the 
   caliper to bracket bolts?  I assume the bracket to spindle bolts 
   take the same torque as (hopefully) published in the Bentley.

3) The ECS invoice also says "check caliper hold down bolts to confirm 
   that length is not too long" -- are they talking about their supplied
   bolts (caliper to bracket), or the ones that mount their bracket to
   the spindle?  I guess I should call them on this one...

4) Is the splash shield retained with the big brake setup?  If so, do I
   need to modify it?
   
5) I bought a power bleeder and two liters of ATE super blue.  Is two
   liters enough?  What is the preferred bleeding order -- I am going
   to do a complete flush.

6) Besides the adhesive-backed clips that go into the pistons, is there
   anything else I should do on the squeal-reducing front?

Thanks in advance for your help, and sorry for putting so many questions 
in one message.  I have done a few brake jobs, but this is the first time 
with non-original parts, so I'm a bit of a newb.  Plus I will be borrowing
a garage that's an hour away to do this work, so I really want to get it 
right the first time!

-Kevin
'94 S4, soon to have 'squish-be-gone' upgrade



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