Subaru 4 pots!

[RenegadeSS]

Originally Posted by RB Performance Brakes

For those of you planning on retro fitting or already have the WRX calipers.
RacingBrake offers Front Light Weight Two Piece Rotors for Subaru WRX
That will work with your FRS/BRZ Caliper swap.

FT86Forums member receive free shipping to the lower 48 states using coupon code FT86-SHIP


Reference Photo

RacingBrake Rotors feature 3 patented designs

• Center Mount – Hat mounts onto the surface of the rotor ring, balancing stress load and improving cooling by allowing air flow to enter from both the inboard and outboard side of the rotor
• Convergent Vane – Provides efficient air flow and temperature across the disc surface
• Open Slot – Advantage of both drilled and slotted, optimizes the friction between pad and disc

Street and Track brake pads are also available for your WRX Calipers.
To learn more about us,
Visit our website at
www.RacingBrake.com

I have your brakes on my camaro, and Love them. I would like to have them on my FRS, but I also want a matching rear set. When will the rear be available?

[RB Performance Brakes]

Originally Posted by RenegadeSS

I have your brakes on my camaro, and Love them. I would like to have them on my FRS, but I also want a matching rear set. When will the rear be available?

Are you looking for OE Two piece replacements for your OE brz/frs calipers or for the non Sti 4 pots?

[RenegadeSS]

Originally Posted by RB Performance Brakes

Are you looking for OE Two piece replacements for your OE brz/frs calipers or for the non Sti 4 pots?

Yes. I want a front and rear matching two piece OE size set, but you BBK is looking really good right now.

[RB Performance Brakes]

Originally Posted by RenegadeSS

Yes. I want a front and rear matching two piece OE size set, but you BBK is looking really good right now.

Unfortunately we only have a OE two piece size rotor that will fit the non STi Subaru 4 pots.

We offer several kits for BRZ/FRS's,
once of which is an OE BBK

http://www.ft86club.com/forums/showthread.php?t=59888

We do offer a two piece rotor for the OE BBK if thats something your interested in.

or our tradtional BBK's
http://www.ft86club.com/forums/showthread.php?t=66196

if you need any help,
feel free to ask!

[RenegadeSS]

Originally Posted by RB Performance Brakes

Unfortunately we only have a OE two piece size rotor that will fit the non STi Subaru 4 pots.

We offer several kits for BRZ/FRS's,
once of which is an OE BBK

http://www.ft86club.com/forums/showthread.php?t=59888

We do offer a two piece rotor for the OE BBK if thats something your interested in.

or our tradtional BBK's
http://www.ft86club.com/forums/showthread.php?t=66196

if you need any help,
feel free to ask!

Awesome. I just printed out a template, and checking for fitment. I have some Enkei RPF1s on the way for it.

[RB Performance Brakes]

Originally Posted by RenegadeSS

Awesome. I just printed out a template, and checking for fitment. I have some Enkei RPF1s on the way for it.

Awesome,
let us know how it turns out for you!

[Tor]

Digging up this old thread. Are anyone using the WRX (non sti/bremo) on track?

Do they have better resistance to heat that the stock callipers?

[Northwest86]

They shift bias to the rear from memory. They give more feel some people believe. I just think thats a placebo effect personally. Heatwise they would be minimally different. Not really worth the money. In my opinion you get good pads and fluid, then do a ducting system if needed. If you are exceeding that then you need to look at technique or get a real BBK like the AP setup.

[Tor]

Thanks @Northwest86

I have a track locally (Zolder Circuit) that is quite brake heavy. Lot's braking from 110 mph down to 50-60 and minimal time to cool before the next corner.

I have pads, ss brake lines, Castrol fluid, and Porsche brake cooling. The way it is now, the brakes gets mushy after 2-3 fast laps. They don't really fade, there is still lots of braking effect, but the pedal gets a spongy feel.

Also my discs are looking burned around the edge. Where there was rust, there is now golden/grey deposits.

My though was to get some high quality discs (2 piece rotors, stock size). But I am worried if it will move the problem to the callipers? And was considering if these might help if that's the case.

Probably I am better off going straight to BBK?

[Guillaume]

Originally Posted by Tor

My though was to get some high quality discs (2 piece rotors, stock size). But I am worried if it will move the problem to the callipers? And was considering if these might help if that's the case.

Two piece rotors in stock size will be worse regarding endurance/cooling... Same amount of heat to dissipate in less material. They'll be lighter, though.

[Northwest86]

Those pads are good for about 650C. Stuff like Project Mu HC800s are good for 800 and club racers are similar. So that could help. We have some fairly major braking circuits (5-6 moderate braking points and one large one.) They run fine for us so far. I'm not sure on how the porsche cooling setup is. I assume its a duct into the centre of the rotor? If so maybe a different pad will work better. When some pads get into certain temp ranges they change feel. If a different pad doesn't work then a BBK may be needed. Also look if there is any technique that can be improved. The pedal dance in my experience can reduce temps with less brake pulsing and avoiding ABS at all costs is crucial or they can cook quickly.

What are your rotor temps? Thats usually the best indicator of if you are over the threshold. The DBA rotors have temp paint that changes colour if its exposed to a high enough heat for a period of time. My fronts for example set off the highest marker which is at 660C from memory. I changed brake pads and I've never been that high again. Getting some temp paint meant for brakes and putting it on the outside of the rotor may help see whats happening and if you need a bbk.

[Tor]

Originally Posted by Guillaume

Two piece rotors in stock size will be worse regarding endurance/cooling... Same amount of heat to dissipate in less material. They'll be lighter, though.

I thought aluminum hats would dissipate the heat better?

They look like this and cost a fortune, 576€ for a pair.

They are available as a one piece as well and 200€ less. Would the only benefit be the weight savings (and even with the cost of less heat resistance)?

[Tor]

Originally Posted by Northwest86

Those pads are good for about 650C. Stuff like Project Mu HC800s are good for 800 and club racers are similar. So that could help.

I definitely didn't have pad fade. So I think they hold up pretty well.

I'm not sure on how the porsche cooling setup is. I assume its a duct into the centre of the rotor?

It's just an air guide along the lower control arm.

When some pads get into certain temp ranges they change feel. If a different pad doesn't work then a BBK may be needed.

I wasn't aware of that. Thanks, that could of course be the case too.

The pedal dance in my experience can reduce temps with less brake pulsing and avoiding ABS at all costs is crucial or they can cook quickly.

I didn't get into ABS too often. I'll try pedal dance too next time. Anything to be aware of regarding the lack of electronic brake force distribution? I mean if that will have an impact on handling I should be aware of?

What are your rotor temps?

I don't know, I am still on stock rotors. Maybe a rotor change is all I need?

Thanks for your help and advice, it's much appreciated.


Regarding the WRX callipers:
I have the chance to get my hands on some that was only used for 300 miles at the moment (the previous owner ditched them as he had troubles bleeding them). Would a slight increased rear balance be a negative thing? Or could that actually be a benefit?

[Guillaume]

Originally Posted by Tor

I thought aluminum hats would dissipate the heat better?

They look like this and cost a fortune, 576€ for a pair.

Most of the heat flux goes through the bolts between the flange and rotor (higher contact pressure) and the extra interfaces add thermal resistance. For endurance, you really want mass. The aluminium's higher conductivity doesn't make up for all that.

With stock callipers,you're better off with good OEM replacement (Centric for instance) and extra cooling (this recently popped up http://www.ft86club.com/forums/showthread.php?t=105825 ).