TerenceT

what kind of brakes configuration is the 8 running?

4pot/2 pot or 2 pot/1pot calipers?

thanks

wakeech

i was under the impression that the sport brakes would have the 4 up front, on the 13" rotors...??

welcome to the forum Terrance. please ask more questions.

Good Duck

According to the spec, the 6spd MT get 323mm (12.7in) front and 303mm (11.9in) rear. The 5spd AT get 303mm (11.9in) both front and rear. The spec does not say anything about 4 pot or 2 pot caliper. Plus the attached pic from the press release show that the brake as single caliper.

TerenceT

any chance of knowing the manufactura?

i am new to mazda so.. does Mazda have sister companies? (sort of like Subaru's dash switchs are made by Nissan)

?

Hercules

What difference does it make what the brakes are made of if they stop you in ~110 feet?

zoom44

i don't know, but they do have a "parent" by the name of Ford. which has an interest in many other caompanies.

zoom44

how many times will it stop in that space before they fail and whats it cost to replace them?

Hercules

Point taken, but the Mazda6's brakes are very good (for a sedan) and they don't fade that badly.

I'm not too worried.

zoom44

oops forgot to put one of these there:p i aint worried either herc

Quick_lude

Does Herc EVER leave a post without a positive comment about the RX-8 or other Mazdas? :D :p

This is also a concern for me. Sure the car can stop once or twice in that length.. But since Mazda is marketing the 8 as a sports car I'm expecting a little more than "don't fade that badly" These brakes better handle some lapping time without ANY fade.

Hercules

I don't like the blue color...

BryanH

I wouldn't be worried. These are pretty big brakes. I'm sure you could get them to fade off the showroom floor if you *really* tried, but all you've got to do to stop the fade is put in some real fluid and some better pads.

sheylen

I quote from 4Car : "The brakes also deserve special mention - strong and tireless, the all-disc layout effortlessly reigns in the engine's enthusiasm, and the centre pedal offers strong initial bite"

And that was on a track.

Hercules

Thanks shey

Now hush up Quick, I was right! :D

MikeW

I hope that the brake don't have the same kind of hyper-active brake booster that the Mazda 6 has.

The brakes on the that car a virtually uncontrollable. I took a long test drive, and the brakes are either maximum braking or about 1/2 maximum. There isn't much smoothness available.

PS Love the brake cooling ducts on the Rx-8

zoom44

i thought there were brake cooling ducts awhile ago and was shot down by several people on the board. which ducts are you refering to?

sheylen

welcome shay:D

MikeW

The air flows over the oil coolers first, then exits toward the wheels. The brake rotor shields have scoops molded in to direct air to the rotor vents.

There was a schematic diagram of the front suspension, but where? I don't remember.

I found it
http://www.rx8forum.com/showthread.p...ension+picture

TerenceT

that's a suspension skemetic, i bet 5 buck there's a wheel well covering the direct path from the side of the foglight to the rotors

unless, there are some under body panels that direct some air into the wheel well cavity.

Please note, a brake cooling duct should be a vent (kind of like a clothing dryer air vent) directed into the center of the rotors, letting the centrifigual force of the rotor pull the air outward to dissipate the heat.

eccles

What's this then, a bowl of goldfish?

maxcooper

That is the backing plate for the brake. The last RX-7 had scoops like that, too. The R models also had vents in the lip spoiler at the front of the car and some ducting to direct the air toward the scoops.

I wouldn't call that a brake duct on its own, but it may be part of a more complete brake ducting system. Or not. Either way, those are pretty big rotors for the car's weight and fade should not be much of an issue until you get into heavy track use with more power.

-Max

MikeW

Any hope of the spiral vents in the rotors that the Supra had?

TerenceT

new "veins"

http://www.4subaruparts.com/scripts/...cfm?cat=brakes

maxcooper

Sumitomo makes a bunch of the third gen RX-7 brake parts, perhaps all of them. They may also be the manufacturer for the RX-8 parts, but I only guess that because of the RX-7.

I am sure someone could make curved-vane brake rotors to increase the air cooling of the RX-8 brakes. It is usually possible to use "standard" curved-vane race rotors with custom hats, too. The clearances between the hat and the caliper look pretty tight, though, so I am not sure if there is room.

Project Mu makes some stock-sized rotors for the RX-7 that might have curved vanes (or might not -- can't tell from the pics). They make 2-piece rotors for that application. Baer once told me that they could make custom 2-piece rotors for the RX-7 in the stock size for $500 each or so, and I assume you could use a curved-vane rotor for those.

I saw a 350Z with the factory Brembo setup the other day (lookes nice). It would be cool if they did something similar for the Mazdaspeed RX-8. I imagine you could swap those brakes onto other RX-8s.

-Max