Spieks

Especially interested to know if anybody has gone from A4 (B5 platform) to the S4 master cylinder.

Liam in Montreal

dont need to

Spieks

I have upgraded rear brakes and the pedal travel is longer and softer than I prefer. I'm looking to get that nice firm pedal feel back.

No need to elaborate on rear brake upgrades, just looking to benefit from anybody who has experience with a master cylinder upgrade.

Brent V

Does it retain the E-brake functionality? What kind of fluid did you use?

Spieks

Not sure if anyone else is running this setup on an A4. I run Alcon B types up front and prior to the rear upgrade the pedal was very firm and a fair amount higher. Three track events on this rear setup and I'm very happy with the braking, just want the pedal a little firmer and a little higher.

Setup does retain e-brake, but uses S4 rear calipers and a larger rear rotor. Have been using Motul 600 for years, the softer pedal is NOT a fluid issue...pedal remains consistent lap after lap. S4 rear caliper has a 25.4 mm piston versus A4 rear caliper of 23.81mm.

Liam in Montreal

and stoptechs in the front. dont recall him having pedal issues though..

WYSIWYG

no issues here. you'll just tend to abuse/overuse it<ul><li><a href="http://community.webshots.com/photo/41227127/56048717MwQXCi">nngooooollldd</a></li></ul>

JAFO

is the S4 master cyl. larger?

CharlieGSanD

from what ive heard, yes

Brent V

If you have the same fluid in there as before you put the rear brake kit on, I agree, the pedal feel would not change. However, noting that you've replaced the rear caliper, there is some chance that there's an air bubble in there somewhere.

As a side note, where did you get the S4 rear caliper and carrier from? I was quoted quite a bundle from the stealership, something like 600 bucks for both calipers and both carriers.