Alcon replacement brake discs fitted

[DR-JEKL]

Hi mate what sort of $ do these cost, and how have they fared?

Great to get your feedback that the DS2500's work well in street conditions! I know a guy who has a M2 CP who has optional oem BBK, he said the DS2500 clunk a bit in his application.

[Tengocity]

Originally Posted by DR-JEKL

Hi mate what sort of $ do these cost, and how have they fared?

Great to get your feedback that the DS2500's work well in street conditions! I know a guy who has a M2 CP who has optional oem BBK, he said the DS2500 clunk a bit in his application.

Prices here:
https://www.litchfieldmotors.com/bmw...-m4-f82-brakes

They even held up well, have done around 6 track days so far with them, and around 11k miles, and absolutely stacks of life left in them.

With the DS2500 pad you get a slight clunk when going from forward to reverse, and the opposite. doesn't cause me any issues, and they don't squeal, which is what happens with RS29 pads when used as a daily driver pad.

[mbj666]

Originally Posted by Tengocity

Visited Litchfield this morning and had Alcon 2 piece brake discs fitted, along with Ferodo DS2500 pads, and some upgraded Motul Dot 5.1 fluid.

Great service from Litchfield, pleasure to deal with, and a very interesting car park!

Originally Posted by Tengocity

Prices here:
https://www.litchfieldmotors.com/bmw...-m4-f82-brakes

They even held up well, have done around 6 track days so far with them, and around 11k miles, and absolutely stacks of life left in them.

With the DS2500 pad you get a slight clunk when going from forward to reverse, and the opposite. doesn't cause me any issues, and they don't squeal, which is what happens with RS29 pads when used as a daily driver pad.

great write up tengocity keep us posted on daily use/performance improvements you notice compared to OEM

i am wanting these discs and DS2500 with upgraded brake lines also (getting remus exhaust next after having got the M performance HAS kit few weeks back. once exhaust done alcon discs and pads are next.............

[Vergis]

Originally Posted by Tengocity

Oh yes!

First time on track on Friday there. It was frickin awesome. Spa in a few weeks time too.

I will be at Spa too in a SMB M4 . I will recognise your car there by the brakes

[franzzz]

Originally Posted by Tengocity

Visited Litchfield this morning and had Alcon 2 piece brake discs fitted, along with Ferodo DS2500 pads, and some upgraded Motul Dot 5.1 fluid.

Great service from Litchfield, pleasure to deal with, and a very interesting car park!

Good for track sessions ?

Vibrations ?

[Tengocity]

Originally Posted by franzzz

Good for track sessions ?

Vibrations ?

My brakes have been excellent on track. No fade. Had some deposits the first time which caused some minor vibrations the first time, but not subsequently.

[franzzz]

Originally Posted by Tengocity

My brakes have been excellent on track. No fade. Had some deposits the first time which caused some minor vibrations the first time, but not subsequently.

Ok tnx.

Vibrations for deposits. No vibrations due to deformation

[Tengocity]

Originally Posted by franzzz

Ok tnx.

Vibrations for deposits. No vibrations due to deformation

No not at all. They cleared up quickly.

[mbj666]

Originally Posted by Tengocity

No not at all. They cleared up quickly.

hi tengocity was there any difference stopping power wise with the new discs ???

good to hear no fade even after track sessions

[Tengocity]

Originally Posted by mbj666

hi tengocity was there any difference stopping power wise with the new discs ???

good to hear no fade even after track sessions

I can't really answer that as I changed from standard pads to upgrade pads at the same time as doing the discs. So stopping power is definitely improved on my car, but I can't tell you if the discs are contributing to that.

What they definitely do is handle heat much better, so helping to avoid fade, and no grumbling or issues afterwards.

[mbj666]

Originally Posted by Tengocity

I can't really answer that as I changed from standard pads to upgrade pads at the same time as doing the discs. So stopping power is definitely improved on my car, but I can't tell you if the discs are contributing to that.

What they definitely do is handle heat much better, so helping to avoid fade, and no grumbling or issues afterwards.

interesting and good to know

i have done in phases i noticed improved stopping power when put the DS2500 pads on, waiting for good ridge line and fluid upgrade next monday, be interesting to see if that improves things again. be bit of time before look at swapping with alcon discs as getting distracted by wheels now

[Gio72]

Hi guys!
Long last - due to Covid restrictions - yesterday I came back to the track (Adria new circuit in Italy) and I tested my two-pieces Alcon rotors, with DS2500, Goodridge tubes and Castrol Racing SRF.
I’m very satisfied with my breaks! After the 2 track-sessions I had some vibrations in the way home, but I hope it’s due to residual dust on the rotors (I hope so…).
Here’s a vid:

[Gio72]

Update

I think that the vibrations are due to deformation of the front rotors. Nothing to do. Alcon are surely better than stock rotors, but they’re not the definitive solution if you want to break hard on track.
After two sessions on track, the front rotors became very noisy when breaking and start vibrating. I first believed it was for dust, but now I suspect that the discs are crooked

[SteveChester]

You should be able to get them re skimmed though?

[D_SheerDrivingPleasure]

It's really hard to warp rotors. Pad deposits is usually the culprit. Maybe try a honer to remove the material and see if it improves.

[Tengocity]

I'd bet a lot of money that it isn't warped rotors, and is in fact pad deposits. I had this after a day at Spa, but the cleaned up and were perfect till I replaced with a full Alcon BBK.

[Gio72]

I hope so, I hope U’re right.
But consider that I warped two sets of stock front rotors: first one was substituted by the dealer under BMW guarantee; second pair I changed with the current two-pieces Alcon.
The track of the video is surely brake-consuming, but I’ve done only a couple of 25 minutes sessions, with 1 lap of cool-down every 2 laps of “time attack”.

[Gio72]

Originally Posted by Tengocity

I'd bet a lot of money that it isn't warped rotors, and is in fact pad deposits. I had this after a day at Spa, but the cleaned up and were perfect till I replaced with a full Alcon BBK.

Hi!
I bought Alcon after reading your interesting review!
I bought also a set of DS2500 pads.
Can U give us more info about Alcon BBK? How much did U spend? Have U got ant pictures? Thanks so much.

[Tengocity]

Originally Posted by Gio72

Hi!
I bought Alcon after reading your interesting review!
I bought also a set of DS2500 pads.
Can U give us more info about Alcon BBK? How much did U spend? Have U got ant pictures? Thanks so much.

https://www.litchfieldmotors.com/bmw...m4-f82-brakes/

Information there. The discs used are similar to the replacement ones, but larger in diameter and thickness, so even better heat management.

They also come with Pagid RS29 pads, which have much better friction properties at high temperatures than DS2500.

[Gio72]

Originally Posted by Tengocity

https://www.litchfieldmotors.com/bmw...m4-f82-brakes/

Information there. The discs used are similar to the replacement ones, but larger in diameter and thickness, so even better heat management.

They also come with Pagid RS29 pads, which have much better friction properties at high temperatures than DS2500.

Thank U so much!
Where are U from?

[Tengocity]

Originally Posted by Gio72

Thank U so much!
Where are U from?

I'm in the UK

[Gio72]

Originally Posted by Tengocity

I'm in the UK

Ah ok, so no problem for you with customs duties.
I live in Italy (Venice) and buying in UK could involve significant additional costs…
Thank you, bye