need new rotors

[A4speed]

noticed a little crack in mine and have been working so much i haven't really been able to take care of it. i want to upgrade to drilled and/or slotted rotors but besides the ones i see on ebay, i dont know where to get a good rotor for a good price. hoping to be pointed in the right direction.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=380136460481&viewitem=&_trkparms=tab%3DWatching

this has been what ive looking at.

[Cincy]

There is no point to run drilled or slotted rotors on the street. Slotted will just eat up the pads quicker and drilled removes pad to rotor surface and will increase stopping distance. Just stick with plain face rotors, they are cheap and work better for a mild street car

[CCA4]

I was thinking of suggesting the stock orbital slotted rotors from BlauParts (http://www.blauparts.com/proddetail.asp?prod=D2B2112-A). My car has these on the back. Would that be pointless as well? :o

[A4speed]

cincy, its all about looking cool, not about whats logical :)

[TT2cabo]

i think the drilled look cool over the slotted for the street . but now. i dont no if its cool if its going to increase stopping. allways heard the slotted ones eat the pads but didnt know about the drilled , just thought it cooled the brakes better . but now it makes sense ,less surface less stopping .allways learn somthing here

[Cincy]

I was thinking of suggesting the stock orbital slotted rotors from BlauParts (http://www.blauparts.com/proddetail.asp?prod=D2B2112-A). My car has these on the back. Would that be pointless as well? :o

THose are ok, dont get having them on just the rears unless you planned on throwing them on the front aswell.

cincy, its all about looking cool, not about whats logical :)

sad.... but true :unsure:

i think the drilled look cool over the slotted for the street . but now. i dont no if its cool if its going to increase stopping. allways heard the slotted ones eat the pads but didnt know about the drilled , just thought it cooled the brakes better . but now it makes sense ,less surface less stopping .allways learn somthing here


Slots take a bit of pad off each brake to keep the pads from glazing over. Since this most likely wont happen on the street, makes them uneeded. Drilled help push water and gas into the holes so the pads make contact. Again not needed for the street. However if you autox or circuit race, a combo set of rotors with higher temp pads would be a good idea to swap in before the event

[CCA4]

THose are ok, dont get having them on just the rears unless you planned on throwing them on the front aswell.

Ya i'm not sure either, I just assumed they came that way from the factory to compensate for the smaller rear rotors? Any of you other A4 guys have these on the back?

[Tweaked]

No modern street pads can get hot enough on the street to "gas." Go with larger blank A8 rotors with TT carriers. More mass in the rotors means more ability to absorb heat and prevent fading due to heat and the larger diameter means more braking torque.

Slotted and/or drilled rotors can be found on Porsches and Ferraris, and even the R8, but the reality is they are more for looks. True race cars have special lightweight rotors and special compound brakes in which drilled or slotted rotors might be necessary. The truth of all of this is, they suck on the street.

Just like racing slicks or racing gear oils, with brakes it's all about heat. Using that much energy to accelerate and decelerate around a track creates a lot of heat; temperatures no street car, or even auto-X car will ever see. Engineers and race teams design the products to work at their best at these high temperatures, but it takes longer to accelerate and decelerate when these components are cold.

With a street car or Auto-X car, the cars need to perform optimally under ALL conditions. The car must go and stop when cold or hot, so the components are designed with some compromise for all out performance, but in the end, yield a beter over-all performing vehicle.

Put it this way: a GT3 cup car is not that fun to drive on the street. It's pretty hair- raising. On the track, it's awesome. But on the street, there's potholes, leaves, sand, pedestrians, uneven surfaces, telephone poles...

And that's my rant for the day. ;)

[auditech79]

Having replaced the brakes on several RS6's which have slotted and cross drilled rotors stock i can tell you they wear like a bad out of hell! I have replaced rotors as soon as 20k on those cars, and those rotors are $400 a pop!!!!
I don't even think the RS6 should have those rotors, it would be more beneficial to have a solid surface.

[Cincy]

My powerslots i had on my last car ate the pads up in almost the same amount of time. My wilwoods have about 16k miles on them and look almost brand new.

[auditech79]

You know whats funny is the material these rotors are made of. Almost all german made cars i have worked on wear through rotors by the 50k mark, even with solid rotors.
My GMC truck for instance has 108,000 miles on it and still has the stock rotors and pads on it, the rotors are still as smooth as glass too. From what i have found car manufactures like to make the rotors out of a softer metal that warps and wears faster than normal, it also transfers more heat to the pads smoking them too.
Its not like it makes it stop better, WTF? Cheap ass mother f***ers.

[A4speed]

thanks for the help and info guys. and rants as well :)