Weight is all fine and well, but you also need to look at the metallurgy of the disks, and, the mounting that the hat uses. There are many variables to consider

Why are those important??

Some manufacturers will use stock disc blanks and drill or knee mill (slot) them. These metals are not supposed to be used for those aggressive applications and have a tendancy to crack or break under all the force with a compromised geometry. Basically if they start cutting holes or slots in the thing, you want to make sure they are using strong metals to reinforce the structure to withstand the hard clamping force of the calipers even with material removed.

Also, when you have a two piece rotor, it is just one more part to go wrong. You need to make sure the manufacturer has confronted the issues when you deal with screw on brake centers.

From the manufacturer site, "Alloyed iron formula adds strength and heat resistance. Heat treating further improves rotor performance for a more uniform and stabilized microstructure."

Center rotor hat mounting, "Exclusive full floating design with 10.9 grade alloyed hardware. Hardware is DACRO coated and crimp locking. DACRO is highly corrosion resistant and provides a film for easier movement between the hat and rotor ring as disc expands and contracts and the crimp design provides positive engagement without rattling or torque loss at temperature."

Those ones at racingbrake linked above look pretty good. However they don't seem to be actually available. The Slotted fronts say 6-8 weeks to ship, the open slotted fronts are "unavailable", and the rears are listed as 12-16 weeks out (holy crap that's 3-4 months).

O.K. So for these Racing Brake rotors, as per their website, these appear to be good quality. Yes?

Sorry, I super multitasking today....

Your asking the right questions. They are others (like me) who want to know :)

keep it up :tup:

Racing Brake was used heavily on tracked STi's. Great results from what other people said. I never used them my self so this is 2nd hand word of mouth. IWSTI.com: Subaru WRX STI Forums is the forum that had all the info on them.

Racing Brake is making some but they need to get 10 pre-orders before they make any. Someone posted a link to the thread on MYG37.com where they are looking for people to commit. I have talked with them on the phone and the rotors they will be making are awesome! I got to check them out first hand and I am sold on a set already!



They are slotted with drilled holes in the actual slots. Like this:

http://www.racingbrake.com/images/openslot_3.jpg

http://www.racingbrake.com/images/openslot_1.jpg

http://www.racingbrake.com/images/openslot_2.jpg


I just purchased my stoptech slotted and drilled rotors from Riverside-Infiniti, they have a bunch in stock when I last talked to them. Wish I would have waited for these.

Are they only going to make drilled or will they have the option of just slotted?

it says how much the front 2 piece slotted rotors weight, but not the rears. and whats the difference between open slots and regular slots?

it said per rotor.. I assumed that meant all of them, but are not the rear rotors smaller than the fronts? So, they should weigh less..

yea i figure, just curious as to how mch they weigh.

they are a rip-off, sure they may look cool & weigh less, but why would I pay $1,600 for just rotors?

beyond just the high price, from a machine and engineering standpoint the slot design is all fail. I would get them for either a show only car that would barely be driven, or a track only car you're willing to risk losing, because slotting should only be done with a ball end mill those are squared forming stress risers in the corners that are HEAVILY crack prone. then they mill pockets into these edges in order to make them more crack prone? I'd be weary of them and i'll wait for a better set that is slotted only, and slotted right

I am hoping PFC (Performance Friction) makes 2 piece rotors for the 370Z. The rotors I had from them for my 05 STi had no slots or drilled holes...just dimples, which helps keep strength, and still evacuates gas buildup between the rotor and pads.

Did you just start typing from what you think or what you know? Have you read their site to see their methodolgy?

I said I'd be weary of them and i am. no one here has had direct experience with the rotors, and everything i mentioned is true. There are a lot of stress points in those rotors that you don't see in any other rotors on the market. But who knows with the price they're charging for those babies they may be made out of magic space shuttle metal that that is also superman laser eye resistant.

'Magic Space Shuttle Metal". That was good...

One of the posters has used these rotors on his G35 and loved them; reported no problems if I am not mistaken. Time will tell with these, but it also appears some of the RX8 guys use them on their RX8's for track duty.

I just wanted to know if you actually heard of their products cracking in the past or if your comment was based purely off observation. Good observation, but observation would also indicate the GTR should not be as fast as it is and that the Spec V should be much faster than the standard GTR....

To your point, let's wait for real world experience on a Z (or G37) with this application.

any new info ...

yeah and that the nismo 370 should be way faster than the regular 370 sport:confused:

they never did them for the last Z, a far more popular car than the 370 will be, I wouldn't hold my breath for this car either unfortunately. Stoptech will, DBA is coming soon as well

Z1, any word if the Stoptech design will be similar to the Racing Brake setup? Two piece rotor/lighter weight?

In for some updates on the stoptech.

You know, with slotted rotors, why do they go so deep, and/or through the brake surface? A couple of MM would be more than enough for gas escape, if that's the main concern.

Glad to hear Stillen is working on these. Presumably that means they won't require a caliper change, or have ridiculous cross drilling.

Any word on the timeframe?

The concern over cracking stems from racers buying cheap rotors kits that manufacturer make by taking regular stock type rotors and drilling into them. Then, the racer turns around and buys cheaper brake pads, and the caliper has to push into the rotors harder to get the pads to brake the car - causing super high heat situations.

The key to having brakes that work is doing your research and matching the correct material brakes with the correct quality pads - and you'll have a good brake system that works together.

Buy Racing brake rotors with Hawk HP pads as they suggest, and you'll have good quality fun :P

I agree w/Equinox...

The Corvette Z06 comes from the factory with drilled rotors. The rotors will show signs of cracking the very first time you take it to the track.

But several high end Porche's come with drill rotors and I haven't seen those crack yet.

Brembo sells drilled rotors but doesn't recommend them for track use (because of cracking).

DBA sells drilled rotors, but lists their 4000 series as drilled only and has no restriction on the 5000 series.

I guess you get what you pay for.

Haha, "you get what you pay for. ie the ZO6 brakes crack on the first go."

I work with an engineer who worked at Wilwood. He has said repeatedly that they laughed at people who wanted drilled rotors, and only offered them because people kept demanding them.

yeah because every brake on a motorcycle you have ever seen is a joke. lol.

I wish stillen would give some info on the slotted rotors they are supposedly making?

I posted about them last week ^

Bump . . .

4000 series comes in slotted only, or slotted and drilled. Same with 5000 series

I would not expect any updates till SEMA (November) from anyone

I know the disks on my motorcycle aren't vented (ie, solid, thick pieces of metal), and, they are stainless steel. The thickness of the braking surface is more than I've seen on vented rotors, and with it being solid, there's little potential that they'd crack or build up enough heat...when you consider the weight of the bike....

Maybe that has something to do with it.

Light weight, two piece rotors for the front and rear sport brakes (Akebono) are now currently available :) ........... http://www.the370z.com/brakes-suspen...brake-kit.html

theyre is one company, relentless motorsports.. these rotors are the nicest rotor ive ever seen, but with a price tag of 1750$ i think ill wait.
370Z Report Relentless Autosports Light Weight 2-Piece Rotor replacements.

^^^ Hahaha, really?? Ya don't say? :p (see the post just above yours)

Thanks for the plug, but it is Relentless AUTOSPORTS, not motorsports. ;) ... and that price was a group buy price... Its just bit higher than that for all four of our, light weight, two piece, full floating rotors now.