Big cheap Porsche brake rotor
09-03-2009 | 05:55 PM
#46
Nordschleife Master
Joined: Apr 2003
Posts: 9,600
Likes: 34
From: Abbotsford B.C.
I would like to know how you figure this. There is TONS of room for the caliper to come out in the front without issues. And an offset spacer is a great idea as the bolts that we need for this to space them out are not overly easy to find. So reusing the stock bolts would be really nice.
09-03-2009 | 06:15 PM
#47
Rennlist Member
Joined: Feb 2003
Posts: 29,956
Likes: 180
From: saratoga, ca
think steve is talking about a spacer that would move the rotor outward, as that would move the wheel outward as well. an offset spacer on the caliper, is independent of that,and could match the rotor, as long as the caliper has room to move outboard and not hit the wheel spokes.. (from S4 to cayeene for example)
I would like to know how you figure this. There is TONS of room for the caliper to come out in the front without issues. And an offset spacer is a great idea as the bolts that we need for this to space them out are not overly easy to find. So reusing the stock bolts would be really nice.
09-03-2009 | 06:19 PM
#48
Rennlist Member
Joined: Feb 2003
Posts: 29,956
Likes: 180
From: saratoga, ca
the hotter side is not the inboard side, its the outboard side. thats the side that doesnt get any cooling flow. the air goes out the wheel and gets hit with cooling ducts from the inboard side. the outers are left to cook and to CRACK! 
nice thing about stopteck 13" brakes , is that they use the same exact pad as we do on the S4. (stoptech ST40s)
mk
nice thing about stopteck 13" brakes , is that they use the same exact pad as we do on the S4. (stoptech ST40s)
mk
I still nominate the Stoptech. I spoke with the guys over at Zeckausen - one of the Porsche oriented Stop-Tech dealers (they also sell other products, so believe it was an un-biased conversation) - and they said that the service life on the Stop-Tech rotors were very good, and often outlived the Brembo counterpart. While coleman has been around a while, i have to imagine that they are using a lower grade alloy. Too bad ST doesnt make a 928 friendly hat, as they have some nice features, including vanes on the hat to assist cooling the inboard (hotter) side of the rotor for a more even wear and warm-up, which theoretically, should reduce fatigue and the cracking/crazing that appears on heavily used rotors.
09-03-2009 | 07:45 PM
#49
Rennlist Member
Joined: Jan 2006
Posts: 975
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From: central cal
Yes I was speaking of moving the wheel and rotor out farther from the centline of the car- I can't even get a pencil between my tires and the fender....
We can make little vaney-things if you think that actually does something....just having a space there is good, as it lets some air from inside the rotor, where, as Mark says, all the cooling air is ducted to. The shape of the pads ad shown more show than go, but it certainly doesn't hurt. The hats on my car are open between the rotor mount pads just for that reason. Putting vanes in there makes the hat directional, just like the rotor.
Has anyone checked pricing on Stop-techs rotors? or gotten a price for them to make hats? They may be reasonable.
We can make little vaney-things if you think that actually does something....just having a space there is good, as it lets some air from inside the rotor, where, as Mark says, all the cooling air is ducted to. The shape of the pads ad shown more show than go, but it certainly doesn't hurt. The hats on my car are open between the rotor mount pads just for that reason. Putting vanes in there makes the hat directional, just like the rotor.
Has anyone checked pricing on Stop-techs rotors? or gotten a price for them to make hats? They may be reasonable.
09-04-2009 | 11:36 AM
#50
Rennlist Member
Joined: Aug 2003
Posts: 2,623
Likes: 294
From: Indianapolis
I edited my original post to reflect Marks comment. He is correct; I mis-typed. The hot side is the one facing out towards the wheel, not the fender (thanks Mark for catching my slip-up).
A published price list is available on-line, but I dont think its appropriate to link, as they are not sponsors... I dont want to break any rules. 328mm rotors seem to start out at around $230 for slotted, and go up from there. Drilled are about $60 extra. The monster 380x35 are $290 in slotted if that helps give a price range.
Hats go up in price depending on rotor annulus and thickness, They start at $200 and run up to $300. I have looked, and there is no off-the-shelf porsche hat that will fit the 928 without a caliper adapter.
If someone wants to doublecheck and make sure I am not missing anything, here are the rotor fitment guides:
http://www.stoptech.com/tech_info/wheel_fitment.shtml
Thanks,
Hans
A published price list is available on-line, but I dont think its appropriate to link, as they are not sponsors... I dont want to break any rules. 328mm rotors seem to start out at around $230 for slotted, and go up from there. Drilled are about $60 extra. The monster 380x35 are $290 in slotted if that helps give a price range.
Hats go up in price depending on rotor annulus and thickness, They start at $200 and run up to $300. I have looked, and there is no off-the-shelf porsche hat that will fit the 928 without a caliper adapter.
If someone wants to doublecheck and make sure I am not missing anything, here are the rotor fitment guides:
http://www.stoptech.com/tech_info/wheel_fitment.shtml
Thanks,
Hans
