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M3 Track: Racing and DE Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start!


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Old Mon, Aug-13-2018, 05:41:05 AM   #11
Gtfour
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Default Re: Tracking with 996 Brembo setup

If you absolutely need to keep the same bias, that article explained that you can use E31 front Brembo calipers with 996 rear Brembo calipers and you will have the same bias as your E46 M3 non-ZCP.

If you use 996 front and rear Brembo calipers, you will end up with the same brake bias as a ZCP/CSL car. Difference is 2% more bias rear or 2% less bias front.
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Old Mon, Aug-13-2018, 01:44:52 PM   #12
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Default Re: Tracking with 996 Brembo setup

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Originally Posted by Kwakjoe View Post
https://thebuildjournal.com/diy/e46-...-retrofit-diy/

Just read through this article. Seems like it does change the brake bias and makes braking suffer. Guess I’ll stick to oem until used Pfc/AP bbk come up on market lol



I've been running the 996 BBK since shortly after I purchased the car and have close to 20 track days on them. I've been very happy with the results. I run the ECS two piece ZCP rotors and with that set up I have even reduced weight on all 4 corners by a few pounds each.


Brake bias moves to the rear by a very small percentage, but there is no way anyone would ever notice. I can trail brake as much as I want and have never locked up the rear. Keep in mind, and this is actually why I think it is a positive, the brake bias on street cars is set up to be towards the front, because it is obviously much safer. You would not want to have the general population driving around with cars that are set up too neutral, for obvious reasons. For the same reason most cars are set up to under steer, and better drivers usually try to tune that out later with sway bars or what not.

Besides, we are talking a very small percentage of change, but what I wrote is just to give you piece of mind that there is a lot of safety margin in the stock bias. In other words, you are probably improving it by adding a bit rear bias.....make sense?
Side note: My first track car was an e30 M3 and it comes with restriction valve to the rear. Meaning from factory the rear bias is reduced by over 30% (remember these were race cars homolgated for the street). So I took the valve out when I installed a 135i performance brake kit and installed a proportioning valve. ended up running it at almost open, meaning 30% more rear than what the factory had set up.



I don't doubt that a AP racing brake, or some other "real" BBK perform better than the 996's. But at the same time, some are also heavier. The main reason a BBK is better, is because it can handle more heat, but in reality, most brakes, even stock, can stop you just as fast (as long as they don't get too hot), because what slows you down is the grip of your tires. Any half way decent brakes will be able to lock up the wheels. That being said, if you go with overkill huge brakes, you'll just pay more, and you carry more un-sprung weight, and you might need bigger wheels also, which is why I think this kit is perfect.


As far as the rotors are concern. Yes, the cross drilled ones will eventually crack. I just replaced my fronts, but like I said, I got 15+ track days out of them
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Besian VANOS, Euro Headers & Section1, TTFS tune, TMS under-dive pulleys, TC Kline S/A Coil Overs, Brembo 996 Calipers, ECS 2 Piece Rotors, Sportline CS8's, SG CSL Diffuser, OEM CSL Trunk

Last edited by nasieg; Mon, Aug-13-2018 at 01:58:32 PM.
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Old Mon, Aug-13-2018, 03:15:44 PM   #13
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Default Re: Tracking with 996 Brembo setup

On E36, my experience (3 years running)....

- I machined the calipers so I'm using standard E46 M3 rotors. Consumable wear was reduced by quite a bit, I'd guess at least 30% or more. I run the cheapest rotors I can buy. Usually under $100 for all 4 corners. (Always a fun conversation in the pits when I'm talking to Z06 owners. lol)
- It moved brake bias to the rear, too much. Even with ABS. I installed a bias valve to compensate. Much better.
- Brake feel somewhat improved.
- Less frequent overhaul of caliper... I'm going for once per 2 years (~60 track days) now.

If I had it to do over again, I'd go with Wilwoods on all 4 corners. Because, I could nail the brake bias, and use the same pads front/rear.

Again, E36 M3.
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Old Mon, Aug-13-2018, 11:00:33 PM   #14
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Default Re: Tracking with 996 Brembo setup

i have them and i love them. Car stops much better than stock... RobGil on here has them and hes quite the drive with a significant amount of experience and he loves his set up as well.
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Old Mon, Aug-13-2018, 11:39:51 PM   #15
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Default Re: Tracking with 996 Brembo setup

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Originally Posted by OneFastSicilian View Post
i have them and i love them. Car stops much better than stock... RobGil on here has them and hes quite the drive with a significant amount of experience and he loves his set up as well.
What size rotors?
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Old Mon, Aug-13-2018, 11:55:13 PM   #16
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Default Re: Tracking with 996 Brembo setup

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Originally Posted by skylinekin View Post
What size rotors?
OEM ZCP
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Old Sat, Aug-25-2018, 07:13:26 AM   #17
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Default Re: Tracking with 996 Brembo setup

Guys that are doing this 996 bbk. Are you just modifying the fronts and leaving the rear calipers stock?
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Old Sat, Aug-25-2018, 02:51:24 PM   #18
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Default Re: Tracking with 996 Brembo setup

Quote:
Originally Posted by K_pwr View Post
Guys that are doing this 996 bbk. Are you just modifying the fronts and leaving the rear calipers stock?
i did front and rear conversion.. OE ZCP rotors all around.. in the rear I run front Boxster base model pads to get a bigger sweep on the rotor.. and the front pads are Boxster S fronts
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Old Fri, Aug-31-2018, 05:43:09 AM   #19
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Default Re: Tracking with 996 Brembo setup

I’m running this kit front and rear. Running ECS rotors up front. The brake bias feels fine to me. Transitioned from stock to these without a hitch. Do I stop faster or anything, nope. Brake feel is much better and no pad knock back. Better consistency when applying brakes and haven’t experienced pad fade.
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Discussing Tracking with 996 Brembo setup in the M3 Track: Racing and DE Forum - Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)