Skim 390mm discs

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el_ringo
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Skim 390mm discs

Post by el_ringo » Sun May 24, 2015 10:37 pm

Hi All,

Can anyone recommend anywhere between Liverpool and Leeds who can do the large discs?

R
Daytona Grey (C5) RS6 saloon, but just a little better...

**** SOLD!!! :( ****

KW V3 suspension
390mm C6 Brakes
Hotchkis ARBs
Viper Tuning (537bhp 604lbft)
Unit 20 TCU remap
Milltek non-res exhaust and downpipes
100 cell sport cats
Aero wipers
Winter wheels
Wagner intercoolers
LED interior lights

Tesla Model S 85D
All the options with the exception of stupid air suspension

Tesla Model X 60D
Silly doors and all!

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SuprSi
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Re: Skim 390mm discs

Post by SuprSi » Mon May 25, 2015 11:18 am

Hopefully you'll find somewhere, the lathe the garage used here in Southampton could only just fit my 380's.
2003 C5 RS6 Avant Daytona Grey

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el_ringo
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Location: Now in W Yorks

Re: Skim 390mm discs

Post by el_ringo » Mon May 25, 2015 11:24 am

Yeah, I tried a place locally and that didn't fit. Unfortunately the chap who Grizz knows is away for three weeks.
Daytona Grey (C5) RS6 saloon, but just a little better...

**** SOLD!!! :( ****

KW V3 suspension
390mm C6 Brakes
Hotchkis ARBs
Viper Tuning (537bhp 604lbft)
Unit 20 TCU remap
Milltek non-res exhaust and downpipes
100 cell sport cats
Aero wipers
Winter wheels
Wagner intercoolers
LED interior lights

Tesla Model S 85D
All the options with the exception of stupid air suspension

Tesla Model X 60D
Silly doors and all!

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Shoppinit
Cruising
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Joined: Wed Dec 31, 2008 6:24 pm

Re: Skim 390mm discs

Post by Shoppinit » Mon May 25, 2015 12:10 pm

Putting floating disks on a lathe is asking for trouble. Surely you'd have to mill these flat?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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el_ringo
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Re: Skim 390mm discs

Post by el_ringo » Mon May 25, 2015 12:35 pm

Yes, that would be more accurate. Open to that too. At this rate a new set if discs will be less ball ache.
Daytona Grey (C5) RS6 saloon, but just a little better...

**** SOLD!!! :( ****

KW V3 suspension
390mm C6 Brakes
Hotchkis ARBs
Viper Tuning (537bhp 604lbft)
Unit 20 TCU remap
Milltek non-res exhaust and downpipes
100 cell sport cats
Aero wipers
Winter wheels
Wagner intercoolers
LED interior lights

Tesla Model S 85D
All the options with the exception of stupid air suspension

Tesla Model X 60D
Silly doors and all!

User avatar
Shoppinit
Cruising
Posts: 20285
Joined: Wed Dec 31, 2008 6:24 pm

Re: Skim 390mm discs

Post by Shoppinit » Mon May 25, 2015 12:45 pm

The new disks from TPS are quite cheap, but not as cheap as skimming, obviously. What's your issue? I find that the C6 disks pick up deposits quickly, but that you can get them clean again by bedding in the pads again. Or just doing a couple of big stops.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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el_ringo
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Re: Skim 390mm discs

Post by el_ringo » Mon May 25, 2015 1:21 pm

I upgraded to a used a few months C6 set, but found that it was always causing judder so tried the big stops to sort out the deposits. This didn't cure it so I had it checked and the run out is high.

I've just had new steering rack, PAS pipes, cam blet, water pump, 'stat and 20k service so didn't want to add to that bill too much!
Daytona Grey (C5) RS6 saloon, but just a little better...

**** SOLD!!! :( ****

KW V3 suspension
390mm C6 Brakes
Hotchkis ARBs
Viper Tuning (537bhp 604lbft)
Unit 20 TCU remap
Milltek non-res exhaust and downpipes
100 cell sport cats
Aero wipers
Winter wheels
Wagner intercoolers
LED interior lights

Tesla Model S 85D
All the options with the exception of stupid air suspension

Tesla Model X 60D
Silly doors and all!

User avatar
Shoppinit
Cruising
Posts: 20285
Joined: Wed Dec 31, 2008 6:24 pm

Re: Skim 390mm discs

Post by Shoppinit » Mon May 25, 2015 1:26 pm

How did you measure the run-out?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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el_ringo
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Joined: Thu Feb 15, 2007 9:45 pm
Location: Now in W Yorks

Re: Skim 390mm discs

Post by el_ringo » Mon May 25, 2015 1:26 pm

A dial indicator at a local garage.
Daytona Grey (C5) RS6 saloon, but just a little better...

**** SOLD!!! :( ****

KW V3 suspension
390mm C6 Brakes
Hotchkis ARBs
Viper Tuning (537bhp 604lbft)
Unit 20 TCU remap
Milltek non-res exhaust and downpipes
100 cell sport cats
Aero wipers
Winter wheels
Wagner intercoolers
LED interior lights

Tesla Model S 85D
All the options with the exception of stupid air suspension

Tesla Model X 60D
Silly doors and all!

User avatar
Shoppinit
Cruising
Posts: 20285
Joined: Wed Dec 31, 2008 6:24 pm

Re: Skim 390mm discs

Post by Shoppinit » Mon May 25, 2015 1:39 pm

You could try this that I've just discovered:

http://www.skimmydiscs.co.uk/why-skim-your-discs/

There are some places near you. Have no idea if it's any good though.

/just found out they use one at my local Porsche dealership.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

Jultsu
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Re: Skim 390mm discs

Post by Jultsu » Thu May 28, 2015 2:33 pm

I've only had good experiences with disk cutting (one side at a time), even with floating bells and up to 405mm. I have access to an old (from the 60's or 70's) lathe that used to belong to a school. Accuracy is within 0.002mm on the outer edge of the finished surface. So far I've worked on RS6 C5 365mm, RS6 C6 390mm, S6 C7 400mm, MTM RS6 C6 upgrade 405mm.

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Shoppinit
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Re: Skim 390mm discs

Post by Shoppinit » Thu May 28, 2015 5:15 pm

So, Rrrringo, how'd you make out?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Mr Footlong
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Re: Skim 390mm discs

Post by Mr Footlong » Fri May 29, 2015 5:50 pm

Thanks for that link Shopp, I have mildly toasted one of my BG Developments 390mm discs and after replacing half of the front suspension, both front wheel bearings and new pads, all that is left is the disc to explain the low speed brake droning on the right front imo.
Not sure if they can do these floating rotor/bell combos though.
Current:

23' C8 RS6 Vorsprung - 23' RS E-Tron GT Carbon Vorsprung

Gone:

"Brutus"- C5 RS6 Avant - MRC stage 2 - Milltek non-res + 100 cell cats - Wagner ICs - PSS9 - H&R ARBs - OZ Superturismo LM - C6 Custom brakes - HD RNS-E - Various other bits - 555PS/832Nm
"Taz"- C7 RS6 - MRC stage 2 745PS/1095Nm
12' Cayenne Turbo, B7 RS4, S3, Cupra R, XJR, EVO VII, STI8,5,2&WRX, 106 GTI&XSI, other crap.

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Shoppinit
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Re: Skim 390mm discs

Post by Shoppinit » Fri May 29, 2015 5:51 pm

Hmm.. front right... You sure it's not your own semi-frazzled mumblings you're hearing?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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SuprSi
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Location: Southampton

Re: Skim 390mm discs

Post by SuprSi » Fri May 29, 2015 6:38 pm

My girodisc discs are floating, and the lathe cut them perfectly :)
2003 C5 RS6 Avant Daytona Grey

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