SmokeyGatto

Front
http://altex002.web.fc2.com/mycars/s...rontbrake.html

front uses a 323mm
brembo fd2 caliper
RX-8 Type S · type RS rotors

Rear
http://altex002.web.fc2.com/mycars/s...rearbrake.html

312mm by 20mm wide
retains handbrake
FD3S rear rotor
RX7 rear caliper

http://buyee.jp/item/yahoo/auction/j337348359
http://www.ebay.com/itm/JDM-07-11-Ho...16.m2518.l4276
http://buyee.jp/item/yahoo/auction/o67549323

DaGou

I am turning Japanese, I really think so!


Wish it was in English.

SmokeyGatto

google translate, translates whole webpages

https://translate.google.com/

paste the page and go


future is naow, cant wait for the app that translates on the fly for traveling

SlowTeg

Cool article!

I'm not too interested in the fronts as I think Stoptechs aren't too much more when you factor in the cost of the custom hardware (it costs ~$600) plus the calipers, but the replacement rotors should be a good deal cheaper.

The rears are definitely interesting. RX7 rear calipers and rotors can be had for cheap, and the hardware they're selling for the rear costs $517, which isn't cheap, but if it comes with everything needed to fit the calipers and ebrake cables that isn't too bad. So ABS should work fine with this kit correct? ABS is just operated off the sensor mounted to the hub..?

Did you order a set? This is definitely something I've been looking/waiting for. I guess the last question is if there is pad availability for the 93-95 rear rx7 calipers.

imstimpy

I did the math on piston diameters and swept areas awhile back and nothing I could find would match the fluid consumption of the front calipers save for aftermarket kits. If you don't mind a deeper pedal, go for it!

SmokeyGatto

from my understand, which is prob shyte. i assume, abs is retained. That is a must for me. Price is high because your paying for a solution, someone had to figure this out, get it made, then try to sell it. I'm ok with giving someone money for their time.

They specifically state that the ebrake will work. which somehow makes it the only multi pistion rear bbk with an ebrake for street driving.

I havent pulled the trigger, debating it atm. The replacement cost on rotors/pads is where i see savings.

how much longer of a peddle?


as for pads, they are in stock, idk the cost, but assuming bigger pad, bigger diameter rotor = more stable temps. So whatever pads you run should in theory last longer.
fronts
http://store.winmaxusa.com/winmax-w5...dm-type-r.html

rears
http://store.winmaxusa.com/winmax-w5...fd3s-fd3s.html

SlowTeg

I'm pretty sure the rx7 rear caliper is single piston based on pictures. I don't think that's too big a deal though. The ability to retain the ebrake and have a larger VENTED rotor (caliper might be slightly larger as well) are the big pluses.

I looked up pad availability and looks like hawk makes pads as does carbotech for the rx7 rear caliper. No PFC, but could probably try some dtc30's or something in the rear. The cheap replacement cost is also a big plus.

Regarding pedal travel, I'm not sure how you calculate that. Is it just based on the piston size/diameter? If you can get those numbers maybe you can get a rough idea how it'll affect pedal travel.

Please pull the trigger and let us know. I might have to order this for the rear to go with the stoptech kit in the front over the winter.

The front kit w/ the brembo calipers looks like it'll cost you $800 for the calipers, $600 for the hardware, plus rotors. At $1500+, I'd personally just opt for the stoptech kit. Yes replacement rotors will be cheaper, but I'd just err on the side of caution here and prefer a caliper and setup that was designed for the S, not to mention everything is brand new. Also with the stoptech kit, there's a very large pad selection.

SlowTeg

Some more digging..

Rears:
S2000 OEM piston diameter = 40mm, with a smaller rotor (will update this later).
95 RX7 piston diameter = 35mm, with a larger rotor. These are definitely single piston, not dual.

I'll have to lookup some formulas later, but seems like this could work. Pedal travel could even be reduced. I'm not talking about the front though.

SlowTeg

So some quick calculations, these are rears only using a 0.4 cF:

RX7-
caliper piston diameter- 1.37795
Rotor diameter- 12.28
Rear rotor torque- 1675.454

OEM-
caliper piston diameter- 1.5748
Rotor diameter- 11.10
Rear rotor torque- 1954.236

**RX7 rear has 14.2% less brake pressure in rear compared to OEM**

RB rear kit-
caliper piston diameter- 1.5748
diameter- 12.1
Rear rotor torque- 2152.636

**RB rear rotor- 10.1% more brake pressure**

I used this online calculator: http://www.tceperformanceproducts.com/bias-calculator/

The absolute numbers regarding the amount of torque aren't important, but the ratios between the different setups are the important part. So the RX7 rear caliper setup will have 14% less stopping power shifting the bias to the front some. Of course, this can be negated by using a slightly higher cF pad in the rear.

mikefifth

Would I be correct in say in layman's terms that the above proposed brake setup out provide less stopping power than OEM?