Rz brakes and 2 piece rotors
 

I just picked up some RZ brakes for the FD. I am looking for some 2 piece rotors for the setup and there's few options. I was looking at the project Mu SCR Pro 2 piece rotors. There sizing is a few mm off the stock brake size though.. The fronts call for a 314mm x 32mm rotor. Project Mu makes some that are 313mm x 30. I'm a little confused by this. Is there a reason they did this? And would there be any adverse affects by not running the proper sized rotors for those calipers? Also if anyone has any other suggestions for a nice 2 piece rotor for this setup?

Thanks in advance.
- Justin

I run the 99 spec brakes with 2 piece project mu rotors. I purchased them through RHDjapan.com

Brand: PROJECT MU
Product: SCR-PRO Rotors - Rear Mazda FD3S
Part Num: GPRZ028

Brand: PROJECT MU
Product: SCR-PRO Rotors - Front Mazda FD3S SE3P
Part Num: GPRZ027 (FD3S)


They offer other brands as well on that site. Mine have been working well and I definitely recommend them.

Good to know. So with that few mm difference from stock size didnt have any adverse affects? Kinda dumb how they made the diameter smaller and narrower than stock.

Scr gt is a much lighter choice..

I don't know if they are smaller or narrower than stock.

I have a USDM rx7, which has the small rotors front and rear. The 99 spec brake kit has larger diameter and much thicker rotors than ours.

I am unsure of the exact differences between the SCR-PRO and SCR-GT models. I think they are the same size rotor. I doubt there is much of a weight difference between the two. The ones I have are pretty light for how large they are. I bet they use the same rotors, the only difference is the inner aluminum piece....which wouldn't weigh much different, plus the moment of inertia on that would essentially cancel out anyway because the weight is centered right at the hub making it a moot point.

http://www.project-mu.co.jp/matching...R_matching.pdf

Where do you get replacement disc's? Project Mu I'd guess?

Project Mu, RHDjapan, and there are places state side as well. Various vendors.

Awesome thank you. I'm gonna be getting these fairly soon. Ill let you all know how I like them

APP 2 piece are made at the same place. I'd grab those instead with the current sale on rhdjapan. Autoexe might be made at the same place as project mu too but I cant say for sure.

Are they sold as a pair or is that the individual price per rotor?

Jason

Those prices are for the pairs.

so front pair and rear pair.

about $600 for a set of (2) rotors.

for the rears, all you need are the brackets ($100/ea) and you use your USDM calipers. That is how I set mine up.

^ did u notice a decent increase in braking with these rotors?

I decided on Autoexe 2 piece rotors because they're about $550 per pair on Rakuten. I`ll post pictures with measuring tape when I do get them so we can see if they`re the same as Project Mu/APP.

You don't stop shorter when pads both have the same heat into them as the smaller rotors. Where they make a large difference is when you repeatedly brake, the larger rotor (heat sink) is much more capable of repeated braking. I do a lot of high speed stuff, 90-140mph and these brake rotors do well. I am running the ebc yellowstuff brake pads and they are ok. the bluestuff brake pads are much better for what I do. I'll burn through the yellows and throw on the blues when I am done with them (the rear pads were on back order forever on the blues, so I went with yellows first).


If you don't do much aggressive braking and the oem sized rotors do well for you, there is no need to upgrade your brakes.

The car is tracked, I have already experienced serious brake fade enough to scare the crap outa me a few times now, so brakes are in order for sure. So I got the RZ front calipers, going to do the brackets that allow me to run the RZ rotors in the rear with the USDM calipers. I want the 2 piece rotors for 2 reasons, one for getting rid of unsprung weight, and two to help with heat dissipation.

I've heard good things about the EBC blues, and mixed reviews about the hawks. Any input on any other pads? Car is also driven on the street but a pad change is no big deal if needed

I heard carbotech has some good stuff, but not sure which models would work for you.

AX6 is a good dual purpose pad but not enough for true track use(unless ur a slow driver) XP10s are a good track pad for a bigger brake setup.

I'm no longer a fan of trying to dual purpose pads, run street pads and run track pads. Ii melted a set of HP+ pads at pitt intl a few weeks ago, they suck on the street and aren't enough for the track, so I don't see it as a useful pad when anyy old street pad will survive auto x.

Carbotechs have a slow intial bite but are very progressive and excellent pedal modulation, I really like their pads.

Bobcats for the street and xp10s for average track use, 12s for talened drivers or a big/open/fast track.

Jason

Or run the 12's if you're running something better than a UHP street tire.

Jason

AUTOEXE MFD560R
Here's proof Autoexe are the same as the Project Mu discs. PZ027

Attachment 639469

By buying off Rakuten using a proxy you will save $200-300 on a Front+rear set vs buying Project Mu.

Project Mu fronts on RHD Japan ¥68,040
Autoexe fronts on Rakuten ¥56,311

I tried searching for these on there and the price is the same as the project mu for the 17" fd3s rotors????

^ I'll PM you the rakuten links.

^ me too!!

I think shipping through rhdjapan might be cheaper overall? price both out with shipping.

I paid 26550jpy for shipping to my place through the proxy. Package was 30kg and shipped JapanPost. I dont think rhdjapan will be much different for shipping.

Thanks for the link sonic!