Disc and Pad change for the R

[ranton-inc]

I got Zimmerman replacement rotors and wanted to get them slotted (directionally as they are already directionally veined)

going to touch up the calipers also as they are looking a little bland from their dirty next door neighbour (brake dust)






Got road house pads also

The Genuine rotors and Genuine pads would have cost me all up NZD 1600 dollars

I got the zimmerman rotors free thru a good family connection and the pads were only about 100 bucks..

I also wanted the rotors slotted so dropped them up at the machine shop and they were done today..

50 bucks a rotor

came out pretty good if you ask me



(photos taken on my black berry hence the average quality!)

[qsilverza]

Looks the goods, are the rotors OEM size ?

Nice deal on the rotors and pads though I would have stayed away from the slotting with all the stories I hear of rotors cracking etc.

[DaveMack]

Most of the rotor-cracking stories I've heard involve drilling the rotors rather than slotting them. But can't say for sure.

Dave

[ranton-inc]

Looks the goods, are the rotors OEM size ?

Nice deal on the rotors and pads though I would have stayed away from the slotting with all the stories I hear of rotors cracking etc.

crackin is usually drilling where they have been drilled in correctly or they have been drilled for looks and then used for higher stress applications..

Rotors are indeed OEM size 334mm x 32mm

they are a fantastic looking peice of hard ware.. the rotor itself is cast iron as per usual but the centres are a different material it has been machined in to the shape it is not cast. and the two are joined by some high tenside "rods" that are press fitter

essentially its a factory two peice rotor without all the bolts and bulls*&t

will whop em in tonight

my current rotors are well shagged and with the way i drive.. they wail under hard breaking they are well past their minimum thicknesses of 30mm

starting to shudder yay!

[ranton-inc]

and all i need now is slotties for the rear!

and ill look like a holden

speaking of which i sailed past one on a over bridge the other night.. he wasnt impressed as he had his foot buried firmly to the floor boards and a little shopping cart passed him at some absurd speed

[qsilverza]

Ooo nice, I would be interested to see if the veins help with brake fade. Let us know !

Hahahahah.... Go the shopping trolley !

[Treza360]

The Genuine rotors and Genuine pads would have cost me all up NZD 1600 dollars.

Awesome. I'll organise a group buy so everyone can get OEM R32 brakes and pads for a total of AUD $160.

Seriously though the slotted rotors look the goods.
Is there much difference between the Zimmerman brakes and the OEMs in regards to performance, feel etc (before slotting of course)?

[ranton-inc]

ill let you know in two weeks after i have bedded them in buddy..

from a engineering stand point (alot of my friends are engineers im not)

they think the Zimmermanns are much better constructed discs than the oem VW ones.. dunno why.. but to me they look prettier

heres my install on the brakes.. normally would only take me 25 minutes or so.. but im brightening up the calipers which has really slowed down the proces.. but it will look mint again onces its complet!

[ranton-inc]

the other thing im looking at doing in a few weeks is getting a www.tyrolsport.com caliper stiffening kit.

its brass inserts that replace the guidepin guide bushes which standard are rubber.. supposedly having a stiff and snugg brass "bushing" for the guide pins to move thru.. gives the car a better brake feel and cures un even pad wear issues that alot of two pot floating calipers seem to have..

[ranton-inc]

from my past experiences slotting has definatly improved braking performance..

people will generally bull**** you and say cooling this and gas dispersion that..

the real idea of the slotting is to cut the pad face (hence why pads wear a tad quicker when facing slotted rotors..

the idea behind this is that its a fresh friction surface to meet the rotor cast surface.... cos as you know things when they get hot usually get shiny and polished looking.. (like sand turns to glass etc etc) and last time i check a glossy surface versus a glossy surface generally doesnt grip so good..

so stopping the pads from "glazing" is about the sum of what the slots do and have done in my past experience.. where the "cooling" comes in is the veins that runn in the centre of the discs.. and on the r32 and other higher end cars the veins are directional.. not just straight cut..

[balkanac]

Awesome. I'll organise a group buy so everyone can get OEM R32 brakes and pads for a total of AUD $160.

Count me in on that. My brakes are half way gone, but still, they will need to be replaced at some point

[ranton-inc]

hmm the R32 disks have only have 1mm wear on either side before they are farked which is the anoying part!

[Treza360]

Mr Hitman,
How did you design/measure up the slots for the rotors?
Also did you get both sides of each rotor done?
And how deep are the slots in each rotor?
Cheers,
Trent

[ranton-inc]

Mr Hitman,
How did you design/measure up the slots for the rotors?
Also did you get both sides of each rotor done?
And how deep are the slots in each rotor?
Cheers,
Trent

Both Sides or rotor are done indeed you have it staggerd either side ie so opposing slots are half way between eachother the whole way around

I just drew one slot on there and said to the engineer i want about that angle and this long and Six of them he will calculate the rest.

also the minimum disc thickness for the oem rotors is 30 mm.. the as new thickness is 32mm

so each slot is only allowed to be 1mm deep a side.. any deeper and you are tempting fate. (or so the engineer said to me)

1mm sounds shallow.. but they are actually quite deep

[Treza360]

Both Sides or rotor are done indeed you have it staggerd either side ie so opposing slots are half way between eachother the whole way around
I just drew one slot on there and said to the engineer i want about that angle and this long and Six of them he will calculate the rest.
also the minimum disc thickness for the oem rotors is 30 mm.. the as new thickness is 32mm
so each slot is only allowed to be 1mm deep a side.. any deeper and you are tempting fate. (or so the engineer said to me)
1mm sounds shallow.. but they are actually quite deep

Cheers mate. Now to find someone who I can trust to do it while the rotors are shipping.