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01-06-2012, 02:10 PM | #23 |
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Too be honest I don't want to spend 7k just to upgrade my brakes. I do love the look but I only track the car 2-3 times a year with the occasional auto-X.
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01-06-2012, 03:04 PM | #24 | |
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It's not the caliper size itself that is different... The pistons used in the calipers are sized appropriately for the car. I.e. the 6 piston caliper for their GT kit is the same for a number of cars but the pistons used in the calipers are car specific so it matches the stock fluid displacement and works with the factory brake master cylinder. Stoptech does the same thing in their application specific brake kits. |
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01-06-2012, 05:00 PM | #25 |
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I will keep everyone posted on the progress of this project. However, please understand that it is not a simple task and we want to make sure we have it down right and ready.
Glad to see there are others interested in this! Malek
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01-06-2012, 05:03 PM | #26 |
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Are you thinking weeks? Months? Longer?
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01-06-2012, 06:22 PM | #27 | |
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With all that said, though, a lot of what you need to know comes from folks like Brembo directly. And as Malekreza11 said, in that size range, the piston sizes tend to converge around some standard setups, and that includes the OEM calipers. |
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01-06-2012, 07:32 PM | #28 |
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this is awesome! Can't believe bmw didn't do this from the beginning.
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01-07-2012, 12:20 AM | #30 | |
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Whereas my stoptech aero rotors have worn much better. My rotors have worn about 1mm after 2 very hot track weekends. I'm guessing that most looking for a cosmetic upgrade will be happy with this. Not sure if this will be something for someone is looking for more heat capability in their brakes. That is an aspect of this great idea that is up for discussion.
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01-07-2012, 04:26 AM | #31 |
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The weakest link in the OEM brake system is the pads. The performance difference between the OEM pads and factory BMW track pads have shown this. The rotors are OK, at least they float in some sense. However, their floating design also does a "wonderful" job of blocking a tremendous amount of air flow through the rotors vanes. Although perhaps not rigorously quantifiable I would say the next weakest link is either fluid or rotors. Calipers come in a much more distant placing...
How much money can you really save buying four new Brembo calipers as opposed to a kit with rotors? I would imagine kits have a built in discount of sorts that single calipers (pair or complete sets) would not have. Last but not least - Malekreza11 be prepared for a ton of simulation, analysis, real engineering, testing, etc. No one wants to release a potentially flawed design for a cars brake system, probably its single most important safety system. Even though it really is just a block of metal with a few bolt holes in it, it is nothing to screw around with.
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01-07-2012, 01:55 PM | #32 |
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swamp2 pretty much nailed it. Once you solve the pad problem, the next step is to get the rotor temps down. That means a heavy rotor with lots of vanes. The OEM brakes, even with real race pads, just can't cool as well as a BBK rotor:
http://www.m3post.com/forums/showthr...ighlight=rotor |
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01-07-2012, 03:25 PM | #33 |
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01-07-2012, 04:28 PM | #34 |
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01-08-2012, 04:59 AM | #35 |
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I thought chris from Brembo said that the caliper is the same for the 365 and 380 kits but the piston is not the same?
nevertheless, i remember Brembo did a caliper upgrade for the E46 M3 rear...but not for the front. Im sure if it was effective to upgrade front only, Brembo would have done so. Ill let the Formula1/MotoGP champion brake makers decide on what is safe on my car @.@ |
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01-08-2012, 07:03 AM | #36 | |
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01-08-2012, 09:37 AM | #37 |
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They fit with stock GTS rotors - just plug and play:
http://imageshack.us/photo/my-images/199/bild073er.jpg/ |
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01-08-2012, 09:48 AM | #38 | ||
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Quote:
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
Last edited by aus; 01-08-2012 at 06:51 PM.. |
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01-08-2012, 10:04 AM | #40 | ||
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From the official GTS announcement: Quote:
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01-08-2012, 10:14 AM | #41 | |
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One thing is selling a $7000+ kit for the M3 and then another selling a $5000 kit. That $2000 could be the difference of making another sale or simply not otherwise. |
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01-08-2012, 01:04 PM | #42 |
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The GTS fronts are 378x32 and the rears are 380x28.
The OEM GTS rotors are much lighter than the Brembos and the GTS rears have a SS insert for the E-brake where the Brembos only have the aluminium pots. I drove the GTS rotors now for about 25k kms also with heavy track use on Endless pads and they take it pretty well. i always would prefer them over the Brembos. Here are some more pics of my new rotors: http://imageshack.us/g/151/p1100477q.jpg/ |
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01-08-2012, 01:17 PM | #43 | |
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01-08-2012, 01:30 PM | #44 | |
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Welcome back Ralf!!!
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