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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Aug-12-2017, 03:10:24 PM   #1
Paulo M
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Default Comparison test of BBK for the E9x M3 - Surprising results!!!

If you haven't seen it yet, interesting read. Brembo didn't do so well,...thoughts?

Quote:
Originally Posted by Boss330 View Post
German magazine Auto Bild Sportscars did a test of BBK for the E92 M3 in their latest issue (12/2014).

The finishing order was as follows:

1. Stoptech
2. PFC
3. AP Racing
4. BMW original brakes
5. K-Sport (8 pot)
6. Brembo GT kit

The most surprising, to the editors as well, was how bad the Brembo kit did in this test!

From 200km/h - 0 it used 1,9m more than the stock brakes...
From 250km/h - 0 it used 8m more than the stock brakes and a whopping 25m longer than the best BBK!!!

The test was done very meticulously and new Michelin Cup2 tires was fitted for every BBK they tested. And every BBK manufacturers procedures for bedding the brakes was followed to the point.

Each test parametre was tested 20 times (so 200-0 was done 20 times for every BBK).

The test is done with the compounds supplied by the BBK manufacturer and as approved by the TÜV for the kits. Just like what a consumer would get when buying a BBK from the suppliers.

AP Racing and K-Sport both use the Pagid RS29 brake pads.

The test was done at the DEKRA test centre with a independent brake and tuning specialist present.
  • With the Brembo they write that the pressure point was inconsistent and after installation and bleeding the brake pedal was very low. After rebleeding the pressure point was still inconsistent and often required a double braking action to restore the pressure point.

  • AP Racing has a very consistent pressure point.

  • The K8 suffered from severe vibrations after some use. It's also heavier than stock brakes.

  • PFC is 10kg lighter than the stock brakes! Has a consistent and short pedal travel as well as being easy to modulate.

  • Stoptech has short and consistent pedal travel and the best modulation. Highest deceleration and no fade.

    -


EDIT:

Video posted on their FB page:

https://www.facebook.com/video.php?v=890428987647521

UPDATE 20. january 2015:

In the last issue of Auto Bild Sportscars there was a letter in the "Readers letters" section that took up the BBK test.

The editor replied that they assumed that "Brembo had delivered the wrong kit which was the reason behind the disastrous results" and the they would do a new test with the proper Brembo BBK that would be published later.
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Old Sat, Aug-12-2017, 03:16:13 PM   #2
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Default Re: Comparison test of BBK for the E9x M3 - Surprising results!!!

I don't understand this test at all. They should all be capable of activating the ABS and therefore have similar stopping distances. Is there is a delay in pad pressure application perhaps? What am I missing here?
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Old Sat, Aug-12-2017, 03:37:10 PM   #3
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Default Re: Comparison test of BBK for the E9x M3 - Surprising results!!!

Seems like the test measures more HOW DIFFICULT it is to achieve the same (in theory) stopping distance with each brake kit. 'still quite interesting.
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Old Sat, Aug-12-2017, 04:02:38 PM   #4
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Default Re: Comparison test of BBK for the E9x M3 - Surprising results!!!

I remember this test. It's important to keep in mind that they used brake pads supplied by each manufacturer, most likely varying in compound. The true test would be to use the same pad for all of the calipers.

Also, this is a simple go fast and slow down test. Most BBK's are designed for track time not for stopping fast in rush hour traffic.
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Old Sat, Aug-12-2017, 04:22:27 PM   #5
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Default Re: Comparison test of BBK for the E9x M3 - Surprising results!!!

^ Exactly, use the same pad for each test.

If you want to test the caliper and rotor, otherwise... time wasted, in my opinion. I have HAWK HPS squeal pads lol, on my wagon and those ****ers stop.
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Old Sat, Aug-12-2017, 05:26:34 PM   #6
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Default Re: Comparison test of BBK for the E9x M3 - Surprising results!!!

AP Racing and Brembo are the kings of brake products so it doesn't bother the vast majority of serious race teams that continue to trust the top dogs. There is no refuting that fact.

This test is objectively flawed and doesn't prove much.
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Old Sat, Aug-12-2017, 06:28:10 PM   #7
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Default Re: Comparison test of BBK for the E9x M3 - Surprising results!!!

There was a thread started on this when the test came out. I know most people hated this test but for me it's useful. Since I plan on buying a bbk and using it like it is out of the box. I still wouldn't get a Stoptech kit because of knock back issues though and would avoid K sport as well.
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Old Sat, Aug-12-2017, 07:04:07 PM   #8
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Default Re: Comparison test of BBK for the E9x M3 - Surprising results!!!

My take on brakes:
- stock brakes are damn good. Fade can be fixed with pads, fluid and plates.
-BBKs are about looks and heat management. Bigger brake hardware ->better heat management.
-Brake pads make the most difference as they work for different temps.
-PFCs are a no brainer.
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Discussing Comparison test of BBK for the E9x M3 - Surprising results!!! in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)