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Entreri
06-09-2015, 02:32 PM
Hey guys,

I'm about to change rotors on my RS5 and wanted to get some ideas.
I'm ready to change calipers too but don't wanna pay more than 4k (like those Brembo GTR crazy ones).

I decided not to go for ceramics as I don't track much but do some spirited driving.
Would going for a bigger size be a problem/advantage? I was thinking going to 405mm with 6 piston Brembo calipers maybe but someone told me it could affect the balance (?)...

Any help is appreciated ;-)

Entreri
06-18-2015, 02:25 AM
I guess nobody knows [:D]
I finally decided to use the 400mm rotors from the S8 and use the opportunity to paint the calipers in blue to match the car.

I'll let you guys know how it goes !

superswiss
06-18-2015, 02:45 AM
Aren't those gonna be heavier? How are you gonna fit them with the stock calipers? Do you have somebody make you some caliper brackets to move them further out? I think that would also require 21" wheels, otherwise you don't have the clearance.

Entreri
06-18-2015, 05:26 AM
I will have some calipers spacers indeed to make them fit and you need 20" at least, smaller than that doesn't work.
They are substantially bigger so yes heavier, that's what I wanna try out and see if breaking performance vs handling is noticable

superswiss
06-18-2015, 06:22 AM
Post back with your experience. I think you are going the wrong direction. You'll get better performance with a lighter same size as OEM full float design rotor, such as the ECS rotors I have on my car. You'll get less unsprung weight and smaller rotor inertia resulting in better acceleration and handling. The full float design dissipates heat under hard braking much better, self centers the rotors, so less drag and better pad contact/wear and reduces the effects of pad knock back, resulting in more consistent pedal feel and braking. The slotted nature of the rotors expels water and debris to further improve braking in the wet. Then add some higher friction pads if you want more stopping power. Just my thoughts.

Entreri
06-18-2015, 01:31 PM
Thanks for sharing this, I'll be back in this thread in about a week to share the results !

S5xy
06-18-2015, 03:44 PM
Wait, what was wrong with the calipers? I would have just changed to aftermarket rotors...but interested in how this turns out :)

PsYkHoTiK
06-18-2015, 05:51 PM
http://www.girodisc.com/Girodisc-Front-380mm-2pc-Rotor-Upgrade-for-Audi-RS5_p_6542.html

These are lighter than the stock wave rotors. Caliper bolt spacers are included. Great rotors

Entreri
06-19-2015, 03:58 AM
Nothing wrong with the calipers except the color [:D]

Interesting girodisc ones, but the price is close to the Brembos here in Belgium (considering the shipping) and I would then prefer Brembo. Maybe when I'm back in the states and after I waste my S8 rotors :)

Entreri
06-25-2015, 12:52 PM
Alright, the upgrade is done:

This is the evolution:

https://c1.staticflickr.com/1/530/18964887078_5b14eb94fe_k.jpg (https://flic.kr/p/uTS1cG)

Now feast your eyes on the new Calipers !

https://c1.staticflickr.com/1/443/18964744160_f0cfbb992a_b.jpg (https://flic.kr/p/uTRgHA)

The rear ones:

https://c1.staticflickr.com/1/418/18529918034_e005c40a1b_b.jpg (https://flic.kr/p/ueqF4q)IMG_0882 (https://flic.kr/p/ueqF4q) by Jean-Philippe Body (https://www.flickr.com/photos/118728013@N07/), on Flickr

And the result:

https://c1.staticflickr.com/1/418/19146731662_b8da42b0c6_b.jpg (https://flic.kr/p/vaW1g9)

Those were done at the shop with my phone, but I'll take decent ones this weekend after I wash the car :)

As for the feel and brake power, the change is amazing. The amount of pressure needed on the pedal is the same but the braking power is so different. It is difficult to describe in words, but it feels sturdy, constant, stable and smooth in the beginning and when you press the pedal even further, braking multiplies while still feeling sturdy and quiet.
It's that "sturdy" feeling that I really feel and didn't have before. With the stock ones it felt more rash and loose. Not sure if I'm making any sense here [:p]

I will track it in 2 weeks and am curious to see the changes there, but I can already tell I sure won in brake power.

About the weight, I'm at about 2 to 3 kg extra on each rotor, but I don't feel any difference at all ; balance, handling, reaction, everything is the same. This makes me pretty happy because of everything I read and scared me in the beginning.

PsYkHoTiK
06-25-2015, 03:18 PM
Pay close attention to the cross drilled holes. Cracking seems to gather around it's vicinity. Especially for track duty.

Rule of thumb is that the crack are fine as long as they don't group up and:
1) The back of your thumb gets caught in it while running it across the cracks
2) They don't form up into a continuous crack across the face of the rotor (from the inner to the outer)

Love the colored calipers btw!

S5xy
06-25-2015, 07:37 PM
Nice :) Will be interested to see what the difference is like on the track if you ever decide to go.

Your previous rotors...lol, looks exactly like mine after my last track day [>_<]

JamesRS5
06-26-2015, 03:15 AM
The way to stop a crack is to drill a hole at the end of the crack so unless you end up with a network of inter joining cracks, I wouldn't worry too much.

Looking at the condition of your previous rotors, I'd personally have gone down the ceramic option. It's factory installed, it's much lighter and it has absolutely no fade what so ever.

The rotors you installed look great with the painted calipers, I hope they work out for you.

Sftuner
06-26-2015, 09:28 AM
For those with the ECS true float rotors did you guys get the wave rotor? Or the less expensive round one?

Sftuner
06-26-2015, 09:29 AM
Entreri where did you source the RS decal? Thanks

superswiss
06-26-2015, 10:00 AM
For those with the ECS true float rotors did you guys get the wave rotor? Or the less expensive round one?

The wave rotors. The round ones are not full-floating, only semi-floating.

superswiss
06-26-2015, 11:01 AM
Alright, the upgrade is done:

As for the feel and brake power, the change is amazing. The amount of pressure needed on the pedal is the same but the braking power is so different. It is difficult to describe in words, but it feels sturdy, constant, stable and smooth in the beginning and when you press the pedal even further, braking multiplies while still feeling sturdy and quiet.
It's that "sturdy" feeling that I really feel and didn't have before. With the stock ones it felt more rash and loose. Not sure if I'm making any sense here [:p]

I will track it in 2 weeks and am curious to see the changes there, but I can already tell I sure won in brake power.

About the weight, I'm at about 2 to 3 kg extra on each rotor, but I don't feel any difference at all ; balance, handling, reaction, everything is the same. This makes me pretty happy because of everything I read and scared me in the beginning.

Curious about how they hold up on the track. I have a suspicion that they may not do well. That's a lot of holes. For the track you want slotted rotors. Maybe the bigger size will help them get rid of the heat easier. Not a fan of how they look on the car I must say. What pads did you put on?

And some pic whoring of the ECS rotor on mine:

https://c1.staticflickr.com/1/524/18559506953_0ea960ff9a_z.jpg

Entreri
06-27-2015, 12:40 PM
The way to stop a crack is to drill a hole at the end of the crack so unless you end up with a network of inter joining cracks, I wouldn't worry too much.

Looking at the condition of your previous rotors, I'd personally have gone down the ceramic option. It's factory installed, it's much lighter and it has absolutely no fade what so ever.

The rotors you installed look great with the painted calipers, I hope they work out for you.

Thanks for the trick !
I only track my car 1 or 2 times a year so I thought about ceramic but got scared of the squeaking stories in the end.


Entreri where did you source the RS decal? Thanks

Youry from RSQuattro got them for me. They're thick plastic and got a layer of coating along with the rest of the caliper. They're supposed to be heat resistant and such.


Nice :) Will be interested to see what the difference is like on the track if you ever decide to go.

Your previous rotors...lol, looks exactly like mine after my last track day [>_<]

Yeah, you should have seen the state of my pads too, that hour on the track should killed everything related to braking [:D]


Curious about how they hold up on the track. I have a suspicion that they may not do well. That's a lot of holes. For the track you want slotted rotors. Maybe the bigger size will help them get rid of the heat easier. Not a fan of how they look on the car I must say. What pads did you put on?

And some pic whoring of the ECS rotor on mine:


The pads are the OEM ones

jrtthx
07-13-2015, 01:53 PM
What kid of life are you guys getting out of your iron rotors on an RS5? I'm in for new pads this week at 21k miles (no track time...yet) and am trying to anticipate if they'll hit me for rotors as well.

superswiss
07-13-2015, 02:46 PM
What kid of life are you guys getting out of your iron rotors on an RS5? I'm in for new pads this week at 21k miles (no track time...yet) and am trying to anticipate if they'll hit me for rotors as well.

It is recommended that you put on new rotors when the pads are worn, at least on the front. Audi doesn't recommend turning rotors, nor should you turn drilled rotors as it weakens the structure around the holes and makes them more prone to cracks. When my OEM pads were worn at 24k miles, I replaced the rotors with new ECS rotors. On the rear however, I just put on Hawk pads and left the rotors. They should be good for at least two sets of pads.

jrtthx
07-13-2015, 06:45 PM
Ugg, not what I wanted to hear. Thanks for the info though