Be awesome if I can get them off you and source the calipers here in the UK.

I'm running CP5575 (E46 M3 fronts switched around for leading vs trailing) and X rotors, so running CP8350 rears will match up pretty well and keep all consumables easy to source.

 

that bugs me as well but I decided to get over it!

in the corvette world it’s super common to ses radical front with the yellow lettered rear.

I PM’d Austin that im in ... let’s get more people signed up to make this happen!

 

I really need to back out of this thread because I have no business being in the motorsports section. However, I seem to be hitting 600-ish DynoJet whp, so on the street/autocross I want the cold bite of a streetable pad, but also some reassurance coming down from local mountains. I don't know if the front X swap will give me that.

Also, I'm still unclear, what would I do with the fronts to complement 5830 rears? 9660s? Over 5k for the whole thing, right?

I was just revisiting this Brembo GT BBK MotoIQ article from 2009, still relevant to this thread: https://motoiq.com/project-evo-ix-pa...rake-system/2/

 

Road racing has different needs than street and mountains. And 600whp has its own. Anything with cold bite isn't going to last long. Not much of a trade off to be honest. At 600hp you are to a point where you don't get to compromise any more. Other than street driving - for that, any pad will do. I'd go with something low-dust.

 

For street use, all you need is good pads. No need to sink crazy money into upgraded calipers and rotors for any street use, unless you just want style points.

 

I was real happy with cold bite of carbotech xp12 and it was ok for spirited road driving and track (ok, not at 600 whp). Downside was horrendous noise at low speeds, and they would kill the dust seals in no time.

 

Pagid RST3 seem to have instant cold bite and dont fade. They also arent noisy.

 

There are some track pads that have plenty of cold bite. The issue is when they aren't up to proper temp, they destroy rotors. Raybestos ST43's are a good example of this.

 

Theres another issue with bite, it works both ways. Aggressive on also means aggressive off. This is both upsetting in trail braking and abs activation. As Sean said, the ST43 is a great pad hot and feels like it has crazy bite cold. But that high bite is not a good thing.

Something like the DS2500 or EBC Blue is pretty weak in bite and certainly on the too soft side. Totally fine for a 400hp street car but not track use. I really loving the XP10s right now but if I do more track time this year I may try the XT12 with an X rotor.

 

anyone use carbotech ax6 pads?

 

I tried them to combat the noise but hot brake performance was so much worse than XP12 that I just gave up. On stock sized rotors XP12 was the solution. They would get noisy when not exercised on a regular bassis, but only at very low speed, and do require good discs.

 

FYI I brought up the piston size/rotor/brake bias to AP Racing, here is what they said:

 

The pistons still need to stay relatively centered over the pad to keep pad taper from being an issue. The difference in radial depth between stock and the CP8250 pad profile is 10mm. Their kit still shifts bias to the rear by more than they advertise. And again, that's not a bad thing. They are right that the smaller pistons will help with pedal feel if you prefer a shorter pedal travel.

 

That's true too. yea in any case, hoping I don't lose too much performance from the Evo X setup. Waiting on install now until I receive the SSB uprights

 

Did we ever confirm availability of these? (Centric MR X rotors)