Enconsiderate

Hey guys,

I got a buddy who owns a brake shop and he can get me Brembo rotors for a good price as long as I buy in quantity. I was wondering If anyone needed them here.

They are OEM size and either blank, drilled, slotted or drilled and slotted. You decide. The price will be about $230 + shipping.

If you are interested leave a post and If there are enough people I will start ordering. I'll follow up on the thread later.

clayne

Totally overpriced.

The plain undrilled/unslotted (everything else takes away from performance anyways) Brembo OEM replacements are 48$ a piece.

Nice try though.

Enconsiderate

Really?

Where you get that at?

I have looked everywhere and thought I was getting a good price. Thx for the info if its true.

clayne

If the price you were given was 230$ for a set of 4, then they were not trying to really rip you off - just a standard supplier markup.

But if the price you were given was 230$ PER rotor, then you would be getting HEAVILY ripped off.

Enconsiderate

lol

sorry I meant $230 for all 4 rotors. Yay $230 each would be a bit of a mark up.

Where you get rotor for $48/ each?

clayne

I get them through a friend of mine who has a shop. But whoever can get you plain Brembo OEM replacement rotors, 50/piece is average price - it's not special or anything.

cymrex

iTrader: (2)

Not that I like NOPI, but I did get front plain Brembo from rotors for $41.59 each.

http://129.33.208.33/ecat2004/dsp_pa...01993&vaffid=0

The rears are $53.27 each.

http://129.33.208.33/ecat2004/dsp_pa...01993&vaffid=0

clayne

See, there you go.

widebody2

What in the world would make you think he meant $230 a rotor....Also I may be missing something here but when you said "everything else" as in xdrilled or slotted takes away from performance I don't know if I really buy that. "everything else" cools the rotors which not only is supposed to help them stop better but also is supposed to prolong the life of the rotor. I kind of think Porsche put a little thought into this when they decided to use "everything else" right?

jimlab

Slots and holes don't help cool the rotor. Increasing diameter and swept area helps cool the rotor.

Slots were intended to "scrape" pads clean and holes were intended to allow pads to vent gasses released when they were heated... but it's been years since that's been a requirement. With modern pads, a flat rotor is your best bet. They just don't look as pretty, which is why the drilled/slotted rotors sell like blingin' hotcakes...

Porsche put a little thought into it... but from a marketing standpoint, not a performance standpoint. The holes and slots equal "high performance" to most people, just like red painted calipers. Porsche isn't stupid.

bajaman

The only advantage with using drilled/slotted rotors is the de-gassing effect it provides, at least from what I have read.
Under extreme conditions the pads will create a layer of superheated gas that actually reduces braking performance significantly. The slots/holes in the rotor allow this gas to be dissipated.

The problem with drilled rotors is the tendancy to have small cracks start radiating out from the drilled holes.
I don't know about the rest of you guys, but the idea of a catastrophic rotor failure (as in it breaking into pieces or some such ****!) does NOT appeal to me!

clayne

widebody2: perhaps the title of "Who wants Brembo Rotor for $230" made me think in a singular tense.

The only thing that matters with rotors is surface area. You want the most possible. X-drilled rotors for the purpose of venting gassing are pointless with modern pads. Slotted is even debatable at this point.

clayne

Exactly.

And yes, Porsche merely weighed the visual vs performance tradeoff and goes with what marketing wants.

luizajeff

I think the opinion of performance for the type of rotor drilling is an opinion. I don't think so many companies would invest to much time and money for so long on crap rotors and the pro teams that use them?! I have also seen s set of brembo OEM for $60 (set of 2). $230 for a set of 4 drilled and or slotted is a competitive price though but the rx7store has some great deals on the same thing - take a look.

rynberg

It is not opinion, it is fact.

Also, I can't think of a single racing body that uses drilled rotors.

Porsche does it for marketing and because the possibility of the rotors cracking is much smaller with the large rotors they use (>13" rotors vs our 11.5").

areXseven

iTrader: (1)

Also,....drilled rotors help brake dust escape away from the rotor while braking. Less dust build-up while braking = better, quicker stops.

areXseven

iTrader: (1)

I've seen them on Indy and IRL League cars. Also on some Formula 1 cars. They're there for a good reason.

rynberg

I will refer people who don't know better to these links:

https://www.rx7club.com/showthread.p...hreadid=231994

http://scirocco.dyndns.org/faq/brake...n/pfpage1.html

More importantly, the text from Grassroots Motorsports:

Crossdrilling your rotors might look neat, but what is it really doing for you? Well, unless your car is using brake pads from the '40s and 50s, not a whole lot. Rotors were first drilled because early brake pad materials gave off gasses when heated to racing temperatures, a process known as "gassing out." These gasses then formed a thin layer between the brake pad face and the rotor, acting as a lubricant and effectively lowering the coefficient of friction. The holes were implemented to give the gasses somewhere to go. It was an effective solution, but today's friction materials do not exhibit the some gassing out phenomenon as the early pads.

For this reason, the holes have carried over more as a design feature than a performance feature. Contrary to popular belief, they don't lower temperatures. (In fact, by removing weight from the rotor, they can actually cause temperatures to increase a little.) These holes create stress risers that allow the rotor to crack sooner, and make a mess of brake pads--sort of like a cheese grater rubbing against them at every stop. Want more evidence? Look at NASCAR or F1. You would think that if drilling holes in the rotor was the hot ticket, these teams would be doing it.

The one glaring exception here is in the rare situation where the rotors are so oversized that they need to be drilled like Swiss cheese. (Look at any performance motorcycle or lighter formula car, for an example.) While the issues of stress risers and brake pad wear are still present, drilling is used to reduce the mass of the parts in spite of these concerns. Remember that nothing comes for free. If these teams switched to non-drilled rotors, they would see lower operating temperatures and longer brake pad life, at the expense of higher weight. It's all about tradeoffs.

Slotting rotors, on the other hand, might be a consideration if your sanctioning body allows for it. Cutting thin slots across the face of the rotor can actually help to clean the face of the brake pads over time, helping to reduce the glazing often found during high-speed use which can lower the coefficient of friction. While there may still be a small concern over creating stress risers in the face of the rotor, if the slots are shallow and cut properly, the trade-off appears to be worth the risk. (Have you looked at a NASCAR rotor lately?)