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I seem to remember seeing OEM-type replacement rotors (for use with stock calipers and pads) that had an aluminum hat in the center to save weight. Been Googling around without much luck.
Anyone know a source?
Again, this is NOT for a big brake kit, or upgrading to big brakes, just dropping weight on the stock setup.
Got mine many years ago from KVRperformance.com. No longer offered on their website though. FWIW, there was a 4lb weight reduction in the front and 3lbs in the rear.
Yeah, I looked at the Project Mu rotors, it's about $530. Don't know if that's for a pair or for one, though - some of the JDM rotors specifically say it's EACH.
DJF, thanks for the weight saving info! Is that 4lb total on the front or for each rotor? I believe stock rotors are 15 pounds. 4 pounds per corner is killer, 2 pounds is good but not amazing .
A group buy was done years ago for 99 spec size 2-piece rotors for the rear. I think the front was also made but I only bought the rears to go with Stop Tech fronts. Company was Prevision Rotor but I think they've changed owners.
I know you are not looking for a big brake upgrade, but are you interested in upgrading to the RZ 17" upgrade? If you were, Autoexe sells two piece rotors:
A group buy was done years ago for 99 spec size 2-piece rotors for the rear. I think the front was also made but I only bought the rears to go with Stop Tech fronts. Company was Prevision Rotor but I think they've changed owners.
Edit: Precision Brake Company, not sure if they're still around though.
A group buy was done years ago for 99 spec size 2-piece rotors for the rear. I think the front was also made but I only bought the rears to go with Stop Tech fronts. Company was Prevision Rotor but I think they've changed owners.
We've got some 99 spec replacement rotors we worked up... but that won't help you. Are you unwilling to move to aftermarket calipers? We've got some really really affordable BBK's coming at the end of the year which would not only improve performance but shed weight as well
Racing brake used to sell those, but it got discontinued
Hi Everyone,
Greeting from RB. Just picked up this old thread and noticed you guys are really missing our stock replacement 2 pcs rotors which was discontinued a few years back.
We truly appreciated all your support and loyalty, and like you to know that stock replacement (front and rear) two piece rotors for RX7 are being made available again.
In fact we made the bundle pricing even more affordable than 10 years ago just to say big "thank you". No need to wait, no GB is required.
We are also re-activating our front (3332x32) and rear (322x20) BBK that fits under 17" wheels, plus a complete BBK with 355mm front and 350mm rear rotor kit come with RB track duty (RB460) calipers (require 18" wheels).
This is great news. I need this set up for an ASP autocross application. I checked the RB link to their website. It says the front disc is 2mm thicker than OEM and that the OEM caliper needs to be widened to compensate. RB or anyone, can you provide details as to how this is best done? Or can the disc be cut 1 mm on each side if not concerned about longevity and want to reduce weight and/or have clearance issues with a wider caliper.
This is great news. I need this set up for an ASP autocross application. I checked the RB link to their website. It says the front disc is 2mm thicker than OEM and that the OEM caliper needs to be widened to compensate. RB or anyone, can you provide details as to how this is best done? Or can the disc be cut 1 mm on each side if not concerned about longevity and want to reduce weight and/or have clearance issues with a wider caliper.
TIA,
Philip
294x24mm is the OE rotor size for WRX (Subaru) since 2002 until now (same as for BRZ/FRS)
RB offers 1pc and 2pc stock replacement, OE caliper BBK (for RS upgrade) and caliper kits. It was the most popular and successful brake upgrade in Subaru history still is today extending to FRS/BRZ.
Since it's proven design so e see no sense to make a 22mm (thinner) disc just for RX7, nor we think a thinner rotor is a good idea for someone who want to track their car (eg. RX8 stock is 322x24).
Thicker rotor provides extra thermal capacity to keep the braking temperature lower and can extend the life of your brake system (less replacement on pad, rotor, brake fluid etc.)
OE caliper width is 25.5mm, we recommend it be widened to about 27mm for a 24mm rotor (remove 0.75mm per side) to avoid rotor/caliper interference when corning. In fact this 2pc rotor was used by some members with noted modification in one of these old threads, if you search the forum you should be able to find it.
OE calipers are OK but after more than 20 years it shows the age and out-of- date design, so for those who are seriously looking for more efficient set up, stiff yer compact enough to fit under 16" wheels, here is what we have to offer.
See pictures below for comparison.
Caliper weight comparison:
Weight comparison loaded with pads: RB caliper uses D647 standard FMSI# -Same pads as Subaru WRX (w/fixed pistons) and Nissan 300ZX - The most popular pad shape for Japanese imports w/lots of aftermarket pads compounds to choose.
RB caliper body is forged aluminum alloy (vs. casted), and is narrower in width and longer in length than OE. Radial mount vs. axial mount, all these contribute to a more stiff caliper operation for less taper wear and higher braking efficiency.
Also RB caliper is slimmer and requires less axial clearance to clear the wheel spokes. Other construction details such as threaded pad pins (instead of OE's cotter pins) and pad hold down spring and tension springs (4 corners) can assure tight pad fitment with caliper for a smooth and efficient brake set up.
10-31-15, 03:36 PM
OEM replacement brake rotors with aluminum hats?
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