Porsche caliper's upgrade on Edition 30

[the bruce]

piston sizes of Stoptech ST-40 BBK:

It's 34 mm and 38 mm.

So let's do the math:

Pi * radius² = area


908 mm² + 1134 mm² = 2043 mm²

stock Ate FN3 54 caliper = 2290 mm²


So the Stoptech ST-40 seems to be a good match.  Keep in mind
a BBK also provides better pad pressure distribution and larger rotor size.

Cayenne brakes aren't (there are three):


34/36/38 mm : 907.920 + 1017.876 + 1134.115 = ~ 3060 mm²
32/36/38 mm : 804.248 + 1017.876 + 1134.115 = ~ 2956 mm²
30/34/38 mm : 706.858 + 907.920 + 1134.115 = ~ 2749 mm²

.... obviously Cayenne/Touareg/Q7 calipers WILL increase pedal travel (without a
much larger master cylinder) and weaken both brake force distribution, pedal feel
and booster/brake assist functionality. At least LHD Golfs/GTIs have a dual rate
booster and such significiently different pedal travel will shift its threshold.


BTW, S3/R32/R - FNRG 57 mm : 2552 mm²


Don't get me wrong - shurely some other BBKs also have proper piston sizes,
but I bet many don't. Before buying a BBKs make sure it is a good match to your
existing system (master cylinder and rear calipers).

[oak_grun]

wow, thanks for the input guys ..so in short the correct calipers for the Porsche upgrade come off a Boxster.

what disc's do people who use the Boxster caliper use?

thanks

[bacillus]

wow, thanks for the input guys ..so in short the correct calipers for the Porsche upgrade come off a Boxster.

what disc's do people who use the Boxster caliper use?

thanks

The standard 312mm vented front discs.

[oak_grun]

Will they it behind standard ED30 alloys?

Does anyone have any pics of caliper's fitted to ED 30?

Thanks

[bacillus]

Will they it behind standard ED30 alloys?

Does anyone have any pics of caliper's fitted to ED 30?

Thanks

iirc you will need a 3mm spacer to clear the caliper on each side.

[AndyED30]

Here's a couple from mine, I use an 8mm spacer. Works really well and fills the arches too, also 8mm is the point at where H&R hubcentric system comes in so matches way better with the hub and eliminates any movement.

[rich83]

Andy... what setup is that? Specs?

[AndyED30]

Hey Rich.

986 Calipers, Porsche OEM Textar pads (squeak like a bitch), 312mm drilled Brembo disks, HEL lines and H&R 8mm spacers.

For road use it's awesome but I've gota sort that squeak out. I have some anti-rattle shims but not fitted them yet. If that doesn't work then new pads are a must before I go completely mental 

[rich83]

They look great 

[AndyED30]

Cheers Rich, pics are a bit crappy as they are from a Samsung phone. Not up to your standards mate!

[oak_grun]

Here's a couple from mine, I use an 8mm spacer. Works really well and fills the arches too, also 8mm is the point at where H&R hubcentric system comes in so matches way better with the hub and eliminates any movement.

Thanks Andy!  They look awesome. Are your calipers and Boxster one's identical?

will defo be upgrading brakes soon...fund permitting! :)

[AndyED30]

No worries, they are indeed Boxster calipers using the correct part numbers as per DaveB's thread on the NQSBBK.

Just don't use Textar pads unless you want the entire county to know you're driving your car!

[MC71]

^^^^ which pads you going for next Andy?

I still can't decide between some OEM road pads or aftermarket Fast Road pads such as Ferodo DS-2500. 

[campbell511]

Does anyone have the part number for the anti rattle shims at all?

Also if you were to uprate the disk at the same time to something drilled or grooved what are the best options?

Cheers

[MC71]

^^^^ I believe these are the shims your after...

http://www.design911.co.uk/fu/pt66_209_-cma81-cmo82/Porsche/Boxster/Brake-Pad-Anti-vibration-shims/

I am getting new OEM discs (maybe just remove and paint the unswept area) but lots of peeps get the J Hooks from DaveB or grooved or drilled discs.