STI front brakes on BRZ (confirm)

[AZP Installs]

Originally Posted by Draco-REX

Any wheel that fits a Subaru and "Clears Brembos" will work. It's not just diameter, but the face as well. For instance, the WedSport TC105n wheels in 17x8+42 clear and will bolt right up. But Rota Grids in 18x9.5+44 will not.

Any Rim that's for an 04 STi will also work as a way to filter out in search engines.

-mike

[mister.bond]

when i install my 2011 STI Calipers, i found also out that
the mounting tabs for the banjo bolt is now at the bottom, and can no longer secure the brake line.

What can i do to clear this problem ?

[Trap63]

Originally Posted by mister.bond

when i install my 2011 STI Calipers, i found also out that
the mounting tabs for the banjo bolt is now at the bottom, and can no longer secure the brake line.

What can i do to clear this problem ?

copper washers (upper and lower) with proper torque tighten avoid any trouble.
See several threads about STI brake mods for BRZ, otherwise you can buy from Japanparts all genuine fitting tS brake system.
Each of us that modded BRZ brake system have done a job to install with Impreza WRX STI parts.
Motoiq Magazine explains very well the system.
http://www.motoiq.com/MagazineArticl...4078/a-tech-lo

[Fizz]

Originally Posted by mister.bond

when i install my 2011 STI Calipers, i found also out that
the mounting tabs for the banjo bolt is now at the bottom, and can no longer secure the brake line.

What can i do to clear this problem ?

Yes that will happen when you try to reverse mount the calipers so that the pistons are in the "correct" orientation. There's nothing you can do unless you install the calipers the "wrong" way around (like what I did). I've been running it like this for awhile now and there's hardly any irregular pad wear on mine. But ymmv.

[Fizz]

Originally Posted by Trap63

copper washers (upper and lower) with proper torque tighten avoid any trouble.
See several threads about STI brake mods for BRZ, otherwise you can buy from Japanparts all genuine fitting tS brake system.
Each of us that modded BRZ brake system have done a job to install with Impreza WRX STI parts.
Motoiq Magazine explains very well the system.
http://www.motoiq.com/MagazineArticl...4078/a-tech-lo

I'm curious to know how exactly the calipers are mounted on the BRZ tS, because I doubt the caliper itself is any different to the other Brembo fronts found on the STi models. So it either leaves the factory either with the piston orientation upside down (and banjo secured by the tabs), or the other way around. Personally I would think it'll be the former.

[Trap63]

Originally Posted by Fizz

I'm curious to know how exactly the calipers are mounted on the BRZ tS, because I doubt the caliper itself is any different to the other Brembo fronts found on the STi models. So it either leaves the factory either with the piston orientation upside down (and banjo secured by the tabs), or the other way around. Personally I would think it'll be the former.

I believe with right piston orientation and right fitting brake lines with stopper.

[Fizz]

Originally Posted by Trap63

I believe with right piston orientation and right fitting brake lines with stopper.

That would mean Subaru would have to get Brembo to retool and produce a limited number of calipers, specifically for the BRZ tS (which in itself is a small volume edition), that can't be used on any other Subaru models. I doubt it. But who knows...

[Trap63]

Originally Posted by Fizz

That would mean Subaru would have to get Brembo to retool and produce a limited number of calipers, specifically for the BRZ tS (which in itself is a small volume edition), that can't be used on any other Subaru models. I doubt it. But who knows...

here Brembo produces some parts on request by constructors with special colors and therefore Subaru might have had to require some variations. They do.
Sometimes for us in Italy it's unbelievable.....we cannot buy as private consumer directly from plant Brembo parts or Alcantara...made in Italy.
About Alcantara it's impossible to buy here, none want sell you a standalone panel without job........ I am buying it from USA....unbelievable.

[qqqqball]

Originally Posted by Fizz

Hey guys, thought I'd give an update on my front pad wear. Bit of background: my Brembo calipers were installed the "wrong" way, meaning that I simply moved the calipers from left to right, and did not bother swapping the bleed screws around.

From my research prior to fitting the calipers, I was warned about uneven pad wear due to incorrect piston orientation etc etc. But the main reason I did not want to swap the bleeders over was because I really wanted the brake line closest to the caliper banjo to be secured by those "tabs", and I was prepared to live with uneven pad wear.

I had some free time over the Easter break so I removed the pads to inspect, and was fully expecting to junk them and fit new pads. But I was surprised to see the pads were wearing nicely!!! If anything, there's only a slight hint of uneven wear on one side, but nothing major. I just flipped the pads over and will inspect them again after another 5000 miles or so.




Pads are Stoptech Street Performance. Fitted back in June 2014 and have traveled approx 7,500 miles of daily use. Never tracked or autocrossed, but it had a good number of spirited driving with fairly hard braking.

^This is the reason I didn't GAF about swapping the bleeders - evidence....

Probably the best takeaway from the thread.

[Jive Turkey]

you're joking right? the wrong piston is now leading...you can put them on the right way at least. I guess just not swap the bleeders if you don't car about getting all the air out of your brake lines? or you can just buy the cadillac brembos and do it right and swap since they will be brand new and easy to work with...

also 7,500 on those pads is nothing, they were hardly ever pushed so it seems. I have multiple track days/auto-x and about 30k dd miles on mine (i run those pads with DBA 4000 rotors) and they still look like they have plenty of life.

[Moto-P]

Originally Posted by Racecomp Engineering

I could be wrong, but EBD will not solve all of your brake bias problems, especially at the track under hard braking. Maybe one of the other brake gurus can chime in.

- Andrew

Andrew is right.

STI Brembo Caliper install, as long as it is done correctly with inverted bleed position, and with proper rebuild of any used STI Sumitomo-Brembo caliper from a WRX STI will be ok as far as operation of the front caliper.
However, BRZ/86 as well as most cars are very precisely balanced fore-aft, which the larger front caliper will somewhat upset.

While the Electronic Balancer does act when ABS system is activated, and deep braking with near-maximum braking effect is applied, it does prevent lock-up, the brakes up to that point will still be much more rear biased with balance of fluid reaching the front caliper is calibrated to the front piston. It's not THAT far off from stock brakes but it is still somewhat critical in critical level handling on raceways. (and also in light duty braking over very slippery surfaces like snow and rain as well).

I say this repeatedly that BRZ/86 brakes are rather fairly large already from the factory, and does have plenty of capability to stop well in track conditions with the right motorsports oriented pads. And in terms of overall performance the gains by swapping it with STI calipers are not so big, since the pad surface is not much larger if at all than correctly calibrated stock caliper to rotor friction surface.

That said we do see lots of large brake caliper swaps in Endurance level racing where the racing goes on for 4, 8, 12 and 24 hours. In these types of races the bigger caliper affords a much larger pad area, and increased overall wear, so that the pads do not run out during the course of the race so much. These Super Taikyu and ADAC endurance cars though have a proper proportioning system to balance and tune the brakes, that isn't just grafted on the stock lines, and masters. Also, these cars are not using STI caliper swaps but true mono-block opposing calipers that do not warp under heat like the STI production types. They use mono-block racing Brembo, AP, and Alcon units, which are many times more durable and expensive.

The sacrifice here though is that the bigger rotors and caliper combinations do tend to become slightly heavier too, and as such negates another thing we are trying to achieve with race cars, that is to reduce unspring weight at the hub. This is always a give and take in any racing however.

For street users? By all means get the cool looks of the STI calipers. I've nothing against that. But don't expect the Sumitomo Brembo STI production calipers to behave or improve the actual performance of the BRZ/86 by much or if at all. And if you are serious about performance, we need to do a lot of other things than just swap front calipers and costs a ton of cash, so we might as well start from something proper, and designed by racing brake companies, rather than with parts from production cars derived from product planning premise of lowest cost designs.



Have fun with the cars! If it works for you, it's working fine. No one needs to tell you what YOUR car should be or not be, after all.
Just me chiming in with advice to add to your knowledge if you wanted that.

[churchx]

This has been brought up few times .. but it all ends that getting 'brembo' branding for cheap is more important to brake swappers then brake effectiveness/reliability, so imho no sense trying to convince about that sti-swappers. Same thing as with ones going for staggered wheel setup, hellaflush or hellacamber builds. Different priorities.