Some HELP Please :)

[APedicelli]

Hey Guys, So I came upon a rare oppertunity today at the dealer.
Let me explain,
So I was at the delaer this morning getting some new oil put in my S4, and the gentlemen infront of me started to talk. We got in to the normal stuff what we drove and this and that.
Then I found out that he has an R8 and that he is swapping out his brand new (1500km) discs off his R8 and wanted to know if I wanted them..
As anyone would of done not knowing if they would even work on my B8 S4 I took them in a heart beat.
I am now wondering if the discs he gave me from his R8 will fit on my B8 S4 stock brakes?
So if anyone knows anything about these fitting please let me know! :)
BTW I got all 4 front and backs :)

Thanks in advance

[richib86]

absolutely no chance in this lifetime that any of the rotors will fit and he was likely swapping them due to a vibration on braking, its a common issue on the r8's

[APedicelli]

absolutely no chance in this lifetime that any of the rotors will fit and he was likely swapping them due to a vibration on braking, its a common issue on the r8's

No the reason he was changing them was because he got a BBK system put on the car. So I guess we have to see if theyll fit as im gonna be trying this weekend.
But was wondering if anyone had some informed input on this subject.

Thanks tho

[zerinA4]

I have informed input on this subject. They won't fit.

[mdma2004]

+1 towards non-fitment

[richib86]

No the reason he was changing them was because he got a BBK system put on the car. So I guess we have to see if theyll fit as im gonna be trying this weekend.
But was wondering if anyone had some informed input on this subject.

Thanks tho

ive been around for a while... the answer i gave you was a very informed one good luck trying tho

[richib86]

different thickness different diameter different offset... need i go on?

[2011_S4]

ive been around for a while... the answer i gave you was a very informed one good luck trying tho

[NPuter]

Did you seriously think you could just swap the rotors in without changing anything else?

[CreoSTi]

It's a direct swap... The only part you'll need is this;

[B8 S FOR]

S4 Brakes and uh yea..... uh wha?. . . . . .R8 Brakes swap to S4???? WTF? Do yourself a favor and start reading the S4 Forums. Sorry Bro ... they ain't gonna fit just bustin your stones... seriously do some reading out here to better familiarize yourself with your S4.

[APedicelli]

Alright well thanks for the info. According to Audi Canada the entire R8 setup will fit on the S4 including calapers discs and everything else. So I guess ill have to wait and see until tomorrow when I go do my brakes :)

[zerinA4]

Right, so unless you have the calipers and everything else it's a non-starter.

Alright well thanks for the info. According to Audi Canada the entire R8 setup will fit on the S4 including calapers discs and everything else. So I guess ill have to wait and see until tomorrow when I go do my brakes :)

[APedicelli]

Right, so unless you have the calipers and everything else it's a non-starter.

No stress bought all the other things I needed from Audi! :)
Everything should be on by tomorrow afternoon :)

[Blake P]

Subscribed for the epic (fail or win, we'll see...)

[richib86]

see thats another story. the front will have a chance at fitting pending if theres a difference in offsets. the rear I'm very skeptical about but am def interested to see if it will work because if so the rears will be next on my list i just can't see the offsets being close. hell just to run the rear rs5 brakes on our car requires different sized hubs. did you need to order new hubs?

[DATZ]

Breasts: droopy

[CreoSTi]

Subscribed for the epic (fail or win, we'll see...)

+1

Or at least I'm waiting for another über informative subject line like "Some Help Please :)" or "Help Please!!"

[Blake P]

+1

Or at least I'm waiting for another über informative subject line like "Some Help Please :)" or "Help Please!!"

Lol, I honestly skipped over this thread because I thought it was the other one with the awesome subject line...

[B8 S FOR]

Lol, I honestly skipped over this thread because I thought it was the other one with the awesome subject line...

+2 I am still laughing!! I mean ... why bother go get a Stasis Brake Set-up or Stop Tech??? I can't wait to see this one! Make sure you post some pics!

[richib86]

and the verdict is?

[NWS4Guy]

and the verdict is?

Putting on brakes from other cars is a bad idea. The entire braking system from the size of the master cyliner, to the rotors, calipers, how they mount to the car, swept area, and clamping force all play a role. Eff with that, and you upset the overall balance of the braking system and can potentially make braking worse, or even dangerous.

[B8 S FOR]

Putting on brakes from other cars is a bad idea. The entire braking system from the size of the master cyliner, to the rotors, calipers, how they mount to the car, swept area, and clamping force all play a role. Eff with that, and you upset the overall balance of the braking system and can potentially make braking worse, or even dangerous.

+1 EXACTLY!

[zerinA4]

I'll bet the OP doesn't even bother returning to this thread.

[dawei213]

Putting on brakes from other cars is a bad idea. The entire braking system from the size of the master cyliner, to the rotors, calipers, how they mount to the car, swept area, and clamping force all play a role. Eff with that, and you upset the overall balance of the braking system and can potentially make braking worse, or even dangerous.

But what about those who upgrade to BBK w/ upgrade calipers? Doesn't that change the swept area and clamping force as well?

[CreoSTi]

But what about those who upgrade to BBK w/ upgrade calipers? Doesn't that change the swept area and clamping force as well?

Companies (i.e. Stoptech, Brembo, etc.) that offer vehicle-specific BBKs engineer them specifically to the car they're going on. These companies adjust the brake bias with piston size, etc. to ensure that they perform as intended/are safe. What NWS4Guy is referring to is when you swap brakes from another make/model and use them on a car they're not intended for use on.

[richib86]

would you consider this to be the same as the rs5 brakes on my s4? the part number of the master cylinders are the same

[dawei213]

Companies (i.e. Stoptech, Brembo, etc.) that offer vehicle-specific BBKs engineer them specifically to the car they're going on. These companies adjust the brake bias with piston size, etc. to ensure that they perform as intended/are safe. What NWS4Guy is referring to is when you swap brakes from another make/model and use them on a car they're not intended for use on.

Gotcha, thanks for clearing that up!

[A4Turbo04]

cant wait to see the outcome lol