SBG Interest Thread: RX8 Track-Day Big Brake Kit
 

We are posting this thread at the request of a few RX8 owners to see if there is interest in producing an RX8 version of our FD Track-Day Big Brake kit. Utilizing many of the same components from our AP Competition Big Brake Kit, our Wilwood based brake kit uses the same pads and rotor size, but at nearly HALF the cost. The rotors can be upgraded to AP Rotors at a later date as the hat is the same.

Regarding the RX8 specific kit, if we can get 20 people on board, we can produce this kit! Price for the brake kit will be the same as the FD at $1600, however first-time introductory pricing would bring the base kit down to $1275 + shipping!!! We dare you to find another track worthy BBK for a similar price ;) . This kit will only happen with enough people on board (and PAID). As many of the components are shared with the FD brake kit, we could potentially turn this kit around in a few weeks after close.

And now for the details!







https://cimg1.ibsrv.net/gimg/www.rx7...521ef5039d.jpg

Building on the success of our AP Competition Brake System, we produced this brake kit, with the intention of bringing race-inspired engineering to the broader motorsports market. Utilizing many of the specifications of our AP kit, we have designed what is in essence, a light-competition brake system, employing high-end track & street components. The result is a system which provides incredible performance for cost, accessible to the broader driving enthusiast market, which can be easily upgraded to race-performance components if you choose.

https://cimg0.ibsrv.net/gimg/www.rx7...6655065845.jpg

Forged Superlight Calipers use the same 20mm Brake Pads that our AP kit uses. These not only add additional thermal barrier between the rotor and caliper, but will also last longer than a standard competition brake pad. Many other calipers use pads that are 12-17mm’s thick resulting in reduced thermal insulation (potentially more brake fluid boiling), and significantly increased pad replacement intervals. In essence you're getting more brake pad material for the same cost of a set of brake pads. Thanks to using a very common pad shape, replacing pads will also be significantly cheaper and easier to source.


https://cimg8.ibsrv.net/gimg/www.rx7...6aad49397b.jpg

Our SBG Premium Brake Rotors have been designed to provide the highest possible performance for cost. Our design utilizes race-inspired directional veins, which drastically increases air flow compared to a stock, straight vein rotor. Our proprietary slot design improves the responsiveness of braking, with better bite, and prevents excessive brake dust build up, keeping brake components clean and improving mechanical engagement. Optionally this kit is offered with an upgrade to AP Racing Floating Rotors for extreme track use.

https://cimg0.ibsrv.net/gimg/www.rx7...1753a31f58.jpg


This is the perfect package for customers looking for the maximum bang for their buck when it comes to brake performance.

Our Package Includes:

• Wilwood Forged Superlight Calipers
• 6061 Billet Caliper Mounting Brackets
• SBG 325x32mm Solid Mount Premium Brake Rotors or Optional 325x32 Floating AP Rotors
• SBG Designed 2024 T351 Aluminum Rotor Hats
• DOT Approved Stainless Steel Brake Lines with dirt/abrasion sleeves
• Full Pictorial Installation Guide

For more details, view the product page, HERE!


https://cimg9.ibsrv.net/gimg/www.rx7...6f2c4cf772.jpg

Signup list:
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Test fitting with various wheels.... you WILL need 17's.

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(custom kit we put together for our shop car)

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Massive 20mm thick (and cheap) racing pads do a great job of insulating the caliper from brake heat to prevent fluid boiling, and 32mm thick directional curved vane rotors add lots of rotor cooling! Our SBG custom valved Ohlins plus the front and rear brakes have drastically improved the handling of our shop RX8!

Rear option with ebrake to match available???

We can make it, but horse before the cart... let's see if there's even enough interest to make the front kit :icon_tup:

I'm interested in getting both front and rear when you can provide options for the ebrake... less rotating mass and more braking power will be great but I do want an option to keep my ebrake...

^ just responded to you via PM, but I'll repeat it here:

We're working on a 4 corner matching BBK for the FD currently, and assuming there is interest from the RX8 community, we can engineer a rear kit for the RX8 as well with a parking brake option. The FD community has had a VERY large interest in the front kit so far, so engineering a rear kit made sense. We need orders coming in for the front kit to justify starting engineering on the rear... for a cost ballpark, it would be very similar to the front kit. It's not going to be any cheaper than the fronts, and that's possibly the sticking point for many people. If the market is there, we'll do it!

Has interest in this topped out? If so we'll need to table this project. We can only manufacture this setup if you guys actually are interested in buying it. Please keep signing up or this thing will be in prototype form on our shop car only :) We're driving on it daily and they're fantastic brakes! Tons of torque and infinite brake capacity, track or street. Good from the first lap out to the end of the day, and doesn't bat an eye on our hour long backroad sessions

Just back from machining, S2000 front and rear kits and FD Front and rear AP and Wilwood kits! There's been a MASSIVE amount of interest from those communities, though for some reason the RX8 platform doesn't seem to be pushed performance wise. Hopefully something will materialize here though.

It's strange, maybe we're missing the average RX8 demographic? There are so many RX8's out there and we've seen the 8 has immense potential for performance... but somehow it appears to be an under-tuned platform as a whole. :boink:


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ugh. So much want

Look great! Man if only more people got on board

Might as well give the RX8 some SBG love, it's been envious of the FD. Count me in.

Now we're cooking with gas! Keep em coming guys!

Also we may have an optional 6 pot version available... all depends on if you guys want this. Join up!

I just rebuilt my motor for boost, but once my budget loosens up a bit I would love to buy one of these kits.

6pot you say?! pending price i might step it up but I'm for sure in on the current setup

The brackets would be the same so it would just be an additional cost / upgrade option. :rock:

Hmmm, so the more I ponder on this group buy, the more I want in on this. It is just a matter of when I get the money to do so.

Having said that, I want to know what would be the point of having a 6-pot caliper? What that be considered overkill outside of the track?

^ Me too... Trying to free up money from other parts I'm buying... hopefully soon

Honestly 6 pots are for bragging rights... but some people really want a six pot setup. You'll get slightly more even pad wear as you can apply pressure across the pad better, but there's not a significant advantage. Some people just have to have that 6 pot yo :mdrmed:

I have Wilwood 4 pots on my rx8 and found brake performance was reduced vs stock . I believe the reason is that 4 pot piston area is actually less than the stock caliper .
To redress this I wondered about going to a larger disc . This would involve new mounting brackets to space the calipers out to the right position .
Do you have the parts to achieve this ? If so how much ?

Email us at Info@SakeBombGarage.com . Wilwood makes a ton of calipers (but no bolt on kit I've seen). There are a lot of factors ranging from piston size to rotor size which affects bias and brake performance. Email us, it's too complicated and distracting to talk about on the forum.

Nice job sbg, id get one if i didnt already have a bbk

^up

Machining is all done! We're finally ready for launch! (This was actually prompted by interest from the NC community to make this happen, but the brackets were all that we needed to complete the RX8 kit :) ). We actually have TWO big brake kits available now using the same brake bracket and hydraulics... a cheaper version which is just a caliper over stock rotor, and a more track oriented performance version which has a 2 piece directional curved vane rotor which is 32mm THICK! Reverse compatible with AP floating rotors as well ;)




-Wilwood caliper over stock rotor - comes with brackets, lines, and calipers (323x25mm stock rotor) $895


-32mm (thicker) Wilwood caliper over SBG Directional Curved Vane 2-Piece rotors $1495




Pictures and group buy-pricing to come based on interest! Please add your names below if interested. We can put together competitive GB pricing for 10+ kits of either type!

wow, just logged in after some time to find this!... I'm thinking. Hopes for a rear set?

what is the price of the replacement rotor blanks for the two piece rotors?

beers :beer:

Interested in the 2-piece kit. I previously had an FD that I ran time attack with, and I had this kit on it. I can't say enough good things about it - really consistent brake feel, really good fade resistance, it uses a pad design that's readily available, and the pads are thick enough to last for a long time.

That said, I already have some rotors that I bought as spares. So I would be interested in a kit without rotor rings.

I'll take one of these: -Wilwood caliper over stock rotor - comes with brackets, lines, and calipers (323x25mm stock rotor) $895 building a double duty S2 rx8 and would like to have this set up.

You better pick up the phone and call or you might not hear anything back until next year, just sayin’ ...

Got an email it's official! The kit pre-sale price will be $1295. SBG will hopefully do a group buy on this first run.

It's here guys who's in?

https://www.sakebombgarage.com/wilwo...brake-kit-rx8/

https://www.sakebombgarage.com/race-...r-upgrade-rx8/

I'm interested. Still deciding if I "need" the kit with the 32mm rotors, but they sure are sexy!

"Super light" is mentioned in the name of the wilwood caliper conversion. Do you have actual weights? How about weight saving of the wilwood versus stock caliper? Is two small pistons always better than one large piston? What is the surface area of the pistons versus stock surface area?

Warrior777,

Here's the run down:

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The Wilwood kits available for the RX8/NC Miata utilize a 355mm x 28mm rotor in the larger size, while our kit uses a 325mm x 32mm rotor. The two rotor selections are relatively similar in weight, but the Wilwood rotor has a much smaller air gap, less surface area and will cool quite a bit slower by comparison. The usable anulus of the 355 disc is also about the same size as the 325's, which is why both kits use extremely similar brake pads, but our kit has a 80mm thick pad as opposed to the 61mm thick pad offered with the Wilwood kit, so there's 1/3 more pad material, and as a result the pads last much longer.


Wilwood is now offering 6 piston Calipers with most of their kits, but what's very telling is that their standard 6 pot calipers use the exact same pad size/plate as the 4 pot. There's simply no need to go to a 6 pot in this application, so all you're adding is weight, and the ability to up-sell the product. Overall the brake kits are fairly similar in capabilities, but ours comes in a smaller better optimized package (Even though our disc is 325mm vs. the larger 355mm, the rotors have similar weight/heat soak ability, but ours is smaller, with more surface ability and the same usable surface and pad size). We also offer higher quality hardware, and significantly lighter weight rotor hats.


Of course, perhaps most importantly, Our kit is $1295, while the 355 Wilwood starts at $1881 and the vastly inferior 327 rotor kit is $1741 and up. We offer a lot more bang for your buck and a much lighter overall system with better performance and higher quality hardware. Please let me know if there is anything else you'd like clarification on, or alternatively, I'd be happy to talk to the potential customer if they're interested in making a purchase!


To get the actual weight number etc. You'd have to email them.

Thanks for the info comebackqid.
I did find a weight for the wilwood caliper that they used for their rx7 at the beginning of this thread. It was 4lbs 13.6oz. Assuming the rx8 caliper is the same weight it will just be the added weight of the caliper bracket and pads.
I found the weight of stock calipers on another thread:
Front caliper with pads -13lbs
Rear caliper with pads - 9lbs.

Surely there will be some weight savings. Even more with the brake rotors versus stock. But like the Girodisc thread probably anywhere from 2-3lbs per rotor.

Any idea what size piston is used in your wilwood caliper kit? How much do your caliper brackets weigh? Also how much do your larger 80mm thick pads weigh?
Thanks.
I'm interested in the caliper set as I already have the girodisc two piece floating rotors. Would you give a decreased price if I did not need the brake lines? Also am I correct in noticing the calipers are not a group buy item?
Also this would likely mess up braking bias so offering some kind of lightened rear setup preferably with an e-brake option would be excellent.

Oh and the other question is will the calipers fit the Enkei rpf1 17x9?

Whats the offset on the enkei's?

You will not need a brake bias controller/adjuster unless you want to customize settings.

All the other stuff you'd have to ask SBG about it.

Both the standard caliper conversion (caliper over standard RX8 brake rotor) and our 32mm thick 2 piece rotor version kits are available starting next week. These kits are designed for the stock ebrake rear, so it will not mess up or alter brake bias (nothing needed for the rear and no changes / prop valves required). This kit will not screw up brake bias over stock. 41mm pistons in both the stock rotor upgrade kit, and the 32mm two piece kit.

That’s a known problem wheel for aftermarket brakes on an RX8. You can get around it with spacers though.

I have a pair of used RB 2-pc rear rotors if anyone is interested. Just finishing up a rear brake conversion and the rear OE brake rotor offset won’t work with it.

:Peace:

Super Lite is the branding of the wilwood caliper. They have the weights in comparison on the first page of this thread if you skipped it.

I would be curious to see if they sell this with a yellow caliper, if so that's a huge upside to me. Not a track star but for show and spirited driving these would be wonderful.

That being said I wouldn't buy for a little while yet unless I can side hustle my weekend drone business to get me 1300 in my pocket :crazy:

We have one set of Yellow Wilwood calipers left - a set of display models for the two piece rotor set. Shoot us a PM

Bump for anyone looking for a great BBK. We have free shipping on this brake kit and everything in our store good through this weekend. SUMMERSHIP2019 at checkout

It's like a breath of fresh air when someone takes the time and tools and experience to build something of quality...