Should Subaru release a motorsport version of the BRZ?

[old greg]

Originally Posted by coyote

Thought I'd check back on this forum to see if the level of discussion had improved. It hasn't.

You just need to improve the level of your ignore list.

[coyote]

You keep reading about it, I'll keep doing it.

[Dave-ROR]

Originally Posted by lfawishes

simple, 05/06/07 sti=brembos and 5X114 2004 sti=brembos 5X100
rear brembos need special adapter read about it!
brz=5X100


2004 sti was smallest for production making the chances of finding their used equip much more rare, and due to its exclusive bolt pattern more costly and sought after. Therefore not a great option. If you don't understand go read the nasioc thread i posted about swapping the brembos, its everything you need to know about doing the brembo swap. So if you can't figure out what I'm going on about, you should do some reading.

and yes a guy was saying he should be able to build a motorsports brz for 15k and just buy the shell.lol.

I could post a number of threads explaining how you can use parts that aren't from an 04 STI too.

Fact is, we are NOT swapping the hubs so the bolt pattern and hubs don't play a role here at all.

[WingsofWar]

if we are talking about brake hardware for late model STIs some modification may be needed in the fronts for the BRZ because the spindles/knuckles are different, its not just the hubs that's are different between 04STI and 05+STI

[Dave-ROR]

Originally Posted by lfawishes

---Do you understand how the rears fit? they take an adapter either way?

Yes for the older rears on a WRX you do, or run the 08+ with redrilled rotors from what I've read. What none of us know is exactly what's needed to make it work on the BRZ, except for the only group who has done it, and has said it was a simple swap of calipers and rotors. :shrug: (of course I fully expect no parking brake on that swap done on the BRZ by GReddy)

BTW, this is from the very thread you linked regarding the fronts:

04-08 Subaru Brembo Caliper will swap on the any RS or WRX no problem. You will need the 04-08 Caliper and an 04 Rotor (5x100).

Which is what I said, except that that post was old (2008) so not updated to 04-12 calipers for the front.

Did you read the link I sent? That was about a car (a BRZ) where the swap has already been done.

I have been assuming that you were talking about the fronts also, not just the rears. Was I mistaken?

[WingsofWar]

Originally Posted by lfawishes

was the greddy car from sti or just brembos? Well my point was the easy peez swap 04 is rare to find. You are right tho, I guess at the price they cost used it just seems disappointing. I hoped they'd have an option from the start.

i believe that the calipers are Greddy's BBK ..not sure if the manufacturer is the same as Brembo though. Like Brembos stamped with Greddy.

[Dave-ROR]

Originally Posted by WingsofWar

i believe that the calipers are Greddy's BBK ..not sure if the manufacturer is the same as Brembo though. Like Brembos stamped with Greddy.

The tech articles on the greddy say sti. They are making a greddy bbk with 6/4 calipers according to the articles but no one as seen it yet as far as ive seen.

[WingsofWar]

Originally Posted by Dave-ROR

The tech articles on the greddy say sti. They are making a greddy bbk with 6/4 calipers according to the articles but no one as seen it yet as far as ive seen.

gosh....dave don't you think GREDDY SPECTRUM ELITE SE 6/4 is really excessive on that car? 4/1 & 4/2 have been just wonderful for me on my rx7, and with no issues of brake fade.

[chulooz]

I imagine a strong 4/2 setup to be plenty for what this car should have to endure.

[2fast4you]

Originally Posted by chulooz

I imagine a strong 4/2 setup to be plenty for what this car should have to endure.

Really it's overkill as it already has a very strong 2/1 setup with large rotors. A BBK for this car will be good for enduros, but for sprints/HPDE/AutoX stock brakes, better pads, and sticky tires will slow you down plenty fast without the high price tag.

[Dave-ROR]

Originally Posted by WingsofWar

gosh....dave don't you think GREDDY SPECTRUM ELITE SE 6/4 is really excessive on that car? 4/1 & 4/2 have been just wonderful for me on my rx7, and with no issues of brake fade.

Lol I'm not suggesting the greddy bbk is needed. I don't think the sti gear is needed.

[Scubynubie]

Originally Posted by Dave-ROR

Lol I'm not suggesting the greddy bbk is needed. I don't think the sti gear is needed.

^^^This.

I'd guess that STI brakes may even hinder acceleration and cornering speed. STI front rotors are ridiculously heavy. I'd guess about 30 - 35 lbs each. Yes, each. Sure the calipers are lightweight, but the weight of the rotors kills any weight savings and then some.

I'd guess that the hot brake swap would be the Subaru 4-Pot calipers up front and leave the rears alone.

Then just run some good track pads, and a little air ducting and you're good to go.

[Dave-ROR]

Originally Posted by Scubynubie

^^^This.

I'd guess that STI brakes may even hinder acceleration and cornering speed. STI front rotors are ridiculously heavy. I'd guess about 30 - 35 lbs each. Yes, each. Sure the calipers are lightweight, but the weight of the rotors kills any weight savings and then some.

I'd guess that the hot brake swap would be the Subaru 4-Pot calipers up front and leave the rears alone.

Then just run some good track pads, and a little air ducting and you're good to go.

Yep, the WRX 4 pots are made for the 11.6" rotor and are NOT differential-bored as far as I can tell by looking at pics of them being rebuilt, so you can swap them L->R and R->L to get the bleeders on top

That will give you better pad wear and better modulation without upsetting the brake balance any.

The next logical step for those who need larger front heatsinks is the 05+ LGT front brake conversion (the BRZ already has the LGT rear brakes) which requires (based on reading) the Calipers (complete with brackets), new pads and the bigger rotors.. would be a potential upgrade idea once you need new rotors anyways. Piston sizes are the same as the WRX (and we assume the BRZ) so brake pedal feel shouldn't change. This would change the brake balance as the front would have a lot more brake torque so more agressive rear pads may be needed to maintain that balance. Major changes in that balance can actually increase stopping distances which isn't a great trade off just to have more heat capacity up front..

[Homemade WRX]

unless you plan to do some serious track work with the car, as stated, the stock calipers and rotors should be fine with lines, pads and fluid. For those wanting to shave weight, switch to a floating rotors (I know the fronts already exist for this size but not sure on rears) and maybe snag the Subaru (not brembo) 4/2 pot setup though the rear would require a bracket (simple).

For a Brembo 4/2 pot setup, you are carrying more weight. It's sprung weight and rotational as well. So worse suspension performance and slower acceleration....to what extent, eh, I don't feel like working up the rough math

Having owned a 94 Impreza with a WRX swap that was fairly comprable to the BRZ (but made about 60% more power at the time of being RWD), base WRX brakes with pads and fluid will perform plenty well.

As stated above, those needing larger rotors for heat management, yes, the LGT would be the next step (and it needs the caliper bracket too IIRC) but I would get the BDA 5000 rotor for weight. I'd also do the same (or the Giro Disc or Performance Friction rotors) if going to the 'STi Brembos'....weight, save it where you can, without sacrifice.