As my stock brakes were in need of replacing, I decided to upgrade a little at the same time.
First part of the upgrade was to replace the single piston calipers with a 4 piston Brembo caliper off a Q5. This caliper uses the same 345mm x 30mm disc. The calipers I bought from Ebay were 8R0615105 BE and 8R0615106 BE. Be carefull when buying these Q5 Brembo calipers as some are for 320mm discs. After my research I can tell which calipers are the 345mm version and which are not, just from the caliper castings.
As you will see, they were in need of a good refurbish! I used a sandblasting cabinet to clean them up, which worked well. Unfortunately I don't have pictures after the sandblasting, I forgot! I put new seals in the calipers and painted them gloss black to match the stock calipers. I did think of red, but decided against it as I would need to paint the rear calipers too.
With thanks to @EBC Brakes UK I fitted EBC Yellowstuff pads all round (Front pads for the Brembo caliper were about £50 cheaper than the pads to fit the stock S5 caliper!) and USR or Ultima discs.
I re painted the black discs in silver as prefer the silver colour.
I used ATE TYP200 Racing quality brake fluid and used a pressure brake pump to flush the fluid through. This worked really well and faster than using a second person to pump the brake.
I've only done about 60 miles with the new brakes and they are nearly bed in using the gentle braking bed-in stage. Just waiting for the rears to get rid of the black coating and for all the discs to get a sheen to the disc before going for the second stage of bedding in which is higher speed heavier braking to 'burn' on the pad coating onto the discs.
The stock brakes were squealing like hell. This was down to the pads having a sticky backing on them which doesn't allow them to move around in the caliper and this gives the squealing. Using copper grease on the pad backs allows some movement in the caliper hence the grease also being known as anti squeal. The single piston calipers are a sliding type caliper and 1 benefit of upgrading to a fixed multi piston caliper is even pressure on the pads. The stock pads showed signs of uneven pad wear, so this should be eliminated with the 4 pot calipers.
Even after 20 miles, the bite was confident. As I upgraded the front calipers, it's difficult to give a good comparison on the discs and pads as part of the brake feel will be down to the 4 pot calipers and the higher friction Yellowstuff pads. But they do feel good and will update once fully bed in. The initial bite feels very grabby and I need to re-learn how much to press the brakes as it feels like I am hardly pressing them.
So now I have my stock calipers and carriers to fit 345mm discs to your A5 with 320mm discs for sale
www.a5oc.com
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First part of the upgrade was to replace the single piston calipers with a 4 piston Brembo caliper off a Q5. This caliper uses the same 345mm x 30mm disc. The calipers I bought from Ebay were 8R0615105 BE and 8R0615106 BE. Be carefull when buying these Q5 Brembo calipers as some are for 320mm discs. After my research I can tell which calipers are the 345mm version and which are not, just from the caliper castings.
As you will see, they were in need of a good refurbish! I used a sandblasting cabinet to clean them up, which worked well. Unfortunately I don't have pictures after the sandblasting, I forgot! I put new seals in the calipers and painted them gloss black to match the stock calipers. I did think of red, but decided against it as I would need to paint the rear calipers too.With thanks to @EBC Brakes UK I fitted EBC Yellowstuff pads all round (Front pads for the Brembo caliper were about £50 cheaper than the pads to fit the stock S5 caliper!) and USR or Ultima discs.
I re painted the black discs in silver as prefer the silver colour.
I used ATE TYP200 Racing quality brake fluid and used a pressure brake pump to flush the fluid through. This worked really well and faster than using a second person to pump the brake.
I've only done about 60 miles with the new brakes and they are nearly bed in using the gentle braking bed-in stage. Just waiting for the rears to get rid of the black coating and for all the discs to get a sheen to the disc before going for the second stage of bedding in which is higher speed heavier braking to 'burn' on the pad coating onto the discs.
The stock brakes were squealing like hell. This was down to the pads having a sticky backing on them which doesn't allow them to move around in the caliper and this gives the squealing. Using copper grease on the pad backs allows some movement in the caliper hence the grease also being known as anti squeal. The single piston calipers are a sliding type caliper and 1 benefit of upgrading to a fixed multi piston caliper is even pressure on the pads. The stock pads showed signs of uneven pad wear, so this should be eliminated with the 4 pot calipers.
Even after 20 miles, the bite was confident. As I upgraded the front calipers, it's difficult to give a good comparison on the discs and pads as part of the brake feel will be down to the 4 pot calipers and the higher friction Yellowstuff pads. But they do feel good and will update once fully bed in. The initial bite feels very grabby and I need to re-learn how much to press the brakes as it feels like I am hardly pressing them.
So now I have my stock calipers and carriers to fit 345mm discs to your A5 with 320mm discs for sale
S5 Front calipers and carriers - Upgrade to 345mm discs
Audi S5 Front brake calipers and Carriers: Fits A4/S4/A5/S5/Q5 Upgrade to 345mm discs Audi S5 front brake calipers and carriers. Will fit B8 Audi A4/S4/A5/S5/Q5. Upgrade to 345mm discs with these direct bolt on brakes. Good condition, no seized pins or pistons. The badge can be removed and...
www.a5oc.com
