Anyone Using 358mm Discs & Cayenne 6 Pots?

[Ryan_W]

Gents,

Been doing some research today on the Cayenne 6 pot (17/18Z) calipers and 358mm discs, pretty much the ECS Stage 5 kit.
Since I'm running 19" Ultraleggeras, I'll have no clearance issues, but I'm a little concerned about replacement discs...

I see a few of you opt for the R32 334mm discs and get the PCD machined to suit our 5x100 set-up.

Another question I have, are the adapters to run the 358mm discs easy to source? I can only assume that the generic Porsche > Audi adapters on eBay are for the use with smaller discs?

I know we all get bored to death of these 'what breaks' thread, but after hunting the net, I still haven't found any conclusive answers, so bear with me!

Cheers all,

Ryan

 

[aragorn]

Quite a few guys over on the SRS forum are using the 18Z caliper with a 345mm Mercedes disk, so thats another option to consider. I believe they're fairly cheap, although the offset is likely to be totally wrong for an A3.

The same adaptor that allows you to install a 17Z for 330mm disks should also work with the 18Z for 350s as the extra offset comes from the caliper itself, rather than the bracket.

 

[superkarl]

most people use 330's i think.
ask stacey, liquid, and sam from oz. they all run the cayenne calipers.

 

[Ryan_W]

Ah ha, I now understand! Cheers mate. I'm still a little confused with regards the mounting of the larger discs, from pictures they look to be extremely deep compared to standard S3 discs.

I run ET 23 up front with an 8.5" wide wheel, so fingers crossed, clearance shouldn't be an issue...

Any idea what Merc discs they're running?

 

[Ryan_W]

I guess the 334mm's would be sufficient, but lets not pretend 358mm's wouldn't look a little bit good behind some 19" Ultraleggeras

 

[superkarl]

358's are MASSIVE1 i honestly think it would look overkill, the calipers are big enough! lol

 

[Andrew@A.L.D]

I have 355's on mine with 6 pots, Good but i think my master cylinder could do with bleeding a tad

 

[Ryan_W]

What set-up are you using Andrew?

As far as I'm aware, the 18Z calipers use a slightly smaller piston to the 17Z, so pedal feel is pretty much OEM in feel, opposed to the 17Z's which are really pushing the limits of the standard master cylinder...

 

[Andrew@A.L.D]

comp brakes set up

There not mega high spec but still very good for the money

 

[Lizard-Racing]

I run the 17zs on mine with 334mm discs. Pedal travel is long though, on the flip side I can run 17" wheels!

 

[s33nyboy12]

Ryan, what bhp you running? Do you need this brake setup? Or is it for when you get big power.......?

I only ask because people (lizard and ALD Andrew plus others) with this setup run 500 bhp + !

Bit overkill for stage 1 / stage 2 audi s3 IMO. Unless it is for future massive power gains.

Cheers, Sean

 

[StaceyS3]

334mm r32 discs are the way forward....ok not quite as blingy or pub ammo'ish but discs are cheap and easily available (paid £120 for new Ecs plain discs for mine) also they don't need machining or anything as already 5x100

Just my 2 pence

 

[aragorn]

if your going to use the R32 disks, surely the 996 caliper is a better match?

Its lighter, pistons are the right size for the master cylinder, and they cheaper too.

 

[s33nyboy12]

Posts 12 and 13 to this thread make good sense to me. Sounds like a good option 996 callipers and r32 discs.

 

[jk_s3]

Isnt the 334mm r32 disc to large for the off the shelf mounting brackets and 996 calipers? the biggest mount ive seen from creation motorsport is for a 330mm disc with 996 calipers.

 

[Lizard-Racing]

Use Cupra R discs and 996 turbo front calipers with those brackets

 

[jk_s3]

arent cupra r discs 323mm? so then there would be some area of pad that isnt touchin the disc?? sorry if this is a slightly off topic...

 

[Lizard-Racing]

Not if you take 3mm off the adapter brackets

 

[aragorn]

Isnt the 334mm r32 disc to large for the off the shelf mounting brackets and 996 calipers? the biggest mount ive seen from creation motorsport is for a 330mm disc with 996 calipers.

They're radial mount calipers, if it doesnt clear, you can simply shim the adaptors out by a mm or two.

Wether the offset etc is correct for the off the shelf brackets i've no idea, but it wouldnt be impossible to have some made...

 

[Ryan_W]

I'm looking to put some money in my S3 (currently stage 1), but want to sort the brakes and handling out before wacking a huge turbo into the mix.

Having 19" wheels, i'll go with the 358's. Now I just need to find out what disc to use and where to source them....

 

[Jason.s]

£999 gets you a Ksport 8pot 356mm kit. Going to be much price difference once you faff about with getting these brakes to fit?

 

[Sam_]

The adapters for 18z and 17z are different.

There's also the option to run ECS 2 piece R32 discs, which *should* be easier to get replacements for. ECS are strange about selling the rotors or any parts from their kits. Compbrake used to sell a suitable 350mm 2 piece but I don't think they do them anymore. You'll be hard pushed to find some outside of the ECS kit, although I heard Bill does some? Might be worth a call. I'll get some pics of mine up when they arrive...

I've tried to fit my 6 pots a few times now. Clearance on wheels has to be really good right near the hub. Also the adapters I've got seem to foul a casting mark on the hub and I didn't have time (or power supply) to get the grinder out to make some adjustments.