[s-cars] Big brake upgrade help

[Steve Powers]

Kevin asks:

I have Big Reds w/ RS2 brackets and 993TT rotors on BIRA hats, so will
answer what I can based on my experiences.

> 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.

on Big Reds, there is a cast arrow on the caliper which corresponds to
the correct rotation, e.g. is the arrow pointing in the direction the
rotor is turning? Is there such an arrow on the calipers you have?

> 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...

they're probably talking caliper bolts possibly hitting the rotor.
check to make sure.
 
> 4) Is the splash shield retained with the big brake setup?  If so, do I
>   need to modify it?

I needed to simply bend it out. Check it for clearance after install.
Drive the car and get the brakes hot. If it begins to squeal, adjust
it some more. Others have removed it - it really doesn't do much
considering how small it is.

> 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.

two liters is fine for regular flushes. a new system might take three.

Steve