Ed30: Brake upgrades - Any one use 996 + 330mm discs (+brackets....)

[edd30]

Hi,
I've just got myself a 07 ED30. I know there are plenty of threads on here about using boxster (non S) , 996TT, TTRS, R32 calipers.

The car needs new discs front and back. I have a pair of nearly new Porsche Boxster S calipers (same as 996 fronts) 996.351.425 & 996.351.426. I know most people seem to go for the 986, Boxster (non-S) calipers. I'd like to use the 996 ones, as it seems such a shame to sell these ones and buy 986 ones that need new seals and powder coating etc. I'd like to keep the option of fitting 17" winter rims, so not go above 330mm discs.

Anyone use 996.351.425/6 and 330mm discs for MB C Class sport (W203 etc) and what are your thoughts on them ? The kit I'm considering is being sold on ebay # 150823463377.

Thanks

[edd30]

Founds out that the discs are from a MB SLK350, with these specs :

Brake Disc Thickness [mm]    28,0    Brake Disc Type    Perforated / Vented
Centering Diameter [mm]    67    Diameter [mm]    330
Height [mm]    46,5    Hole Arrangement / Number    05/07
Minimum Thickness [mm]    26    Pitch Circle  [mm]    112
Supplementary Article/Supplementary Info 2    without wheel hub, without wheel studs    Weight [kg]    9,62


The standard Golf GTI discs are :

Brake Disc Thickness [mm]    25,0    Brake Disc Type    Vented
Centering Diameter [mm]    65    Diameter [mm]    312
Height [mm]    49,9    Hole Arrangement / Number    09/10
Minimum Thickness [mm]    22    Pitch Circle Ø [mm]    112
Supplementary Article/Supplementary Info 2    without wheel hub, without wheel studs    Weight [kg]    8,25

So 1.25Kg heavier per side. The centering diameter is 2mm larger on the SLK, would it be a problem is practice ? I know the wheel bolts should hold it hub centric, I'm thinking it may vibrate ?

Any experiences out there ?
Thanks

[TommyR]

@EddieA is your man

http://www.mk5golfgti.co.uk/forum/index.php/topic,55164.15.html

Another example... http://www.mk5golfgti.co.uk/forum/index.php/topic,38677.0.html

[TommyR]

@edd30 Whilst looking for some bits for a friends brake conversion I stumbled upon these, not sure what the quality is like mind... http://www.creationsmotorsport.com/product-detail.php?pid=137

[EddieA]

This is the set up that I run and the car has been perfect on them, I use a centering ring on the disc just to stop them moving around.

[edd30]

Eddie what wheels are you using? What size spacers are needed for clearance? Have you tried 17" wheels?

[grey golfster]

This is the set up that I run and the car has been perfect on them, I use a centering ring on the disc just to stop them moving around.

This is the set up that i am trying to sort atm. Clearly i have "wrong" discs tho as only 13mm wheel bolt holes...won't fit, seems 15 required?
To be fair, not all of kit from Creations MS tho.
Perhaps these discs need machining? Hard to tell atm, until can offer up, secure, and measure properly.
Hub bore on new discs is approx 2mm oversize.
By any chance could you give disc p numbrs, hat offsets or similar before i open out bolt holes?
Have been trying to view jimk04 brake build thread, but that too without success so far. What a numpty
Thanks.

[edd30]

grey golfster
W204, post 2011 SLK, CLK etc use M14. W203 use M12 wheel bolts. The 330mm discs are probably for a SLK350.

Any one know the weight difference between a 986 and 996 front caliper ?

[edd30]

Found some interesting info on VAG brakes

OEM:

stock 312mm - 14.5kg
TTS 340mm - 20kg
S3/R32 345mm - 21.5kg
TTRS 370mm - 17kg
RS4/RS6 365mm - 17kg
RS6 V10 390mm - 21.5kg


Non OEM:

VW-R 352x32mm - 12kg
K-Sport 356x32mm - 12.25kg
Brembo 355x32mm - 13kg


(caliper + rotor + pads + bolts + adapter)

Source : http://www.golfmk5.com/forums/showthread.php?t=123479&page=8

[edd30]

Any one know if DaveB makes the brackets for the 996 calipers (no turbo)?
I know Creation Motorsports sell them, but I would prefer them from DB.

[edd30]

May be JimK04 or DaveB can let us know if these brackets are available still