any reason why M engineer still uses 2 pot brakes?
11-27-2006, 11:12 PM
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i dont have any idea why thte brakes are they way they are... but im sure that after a few laps on a hard braking track... the first one to heat would be the bmws... seems porsches, other performance cars have better brakes...
11-28-2006, 12:20 AM
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Originally Posted by fmai' post='361274' date='Nov 28 2006, 04:29 AM
I am sure every make's engineers know the logic of "Why making something more complex when simple solution work best?". The must be clear reason of why more pistons are better [...]
11-28-2006, 03:16 AM
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Originally Posted by big_ipaq' post='361401' date='Nov 28 2006, 01:20 PM
Of course there is a clear reason, and it is called: MARKETING.
11-28-2006, 11:31 AM
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Originally Posted by Ken21' post='361372' date='Nov 28 2006, 02:24 PM
I believe heat dissipation as you said is mostly base on rotors....not the caliper itself....8pots caliper provides more clamping power but doesn't mean it can cool down the heat better....
some nice 2pcs rotors should do the cooling job instead of the calipers
some nice 2pcs rotors should do the cooling job instead of the calipers
M5 rotor is close to brembo BBK rotor size... but disc surface is even smaller for brembo due to bigger hub..
how can a smaller rotor surface area with more pistons clamping have better heat dissipation than bigger surface area with less pistons?
anyone care to explain? i might be wrong thou...
11-28-2006, 01:02 PM
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From my experience the first thing that lets go leading to reduced braking power are the brake pads. I remember once at a track day where my previous 330i running only aftermarket pads performed flawlessly, whereas my friend's M3 on stock setup had SMOKING brakes.
I'm hazarding a guess that on most road cars running street tires, a 2 piston system will do as well as an 8 piston system - thus BMW's decision with the 2 pots. What's the point on having 8 pot calipers when your 2 pot calipers can lock up the tires just fine? Just a guess. I remember reading an article in one of the magazines on why M decided to stick with the 2pots, I'll have to dig it up...
I'm hazarding a guess that on most road cars running street tires, a 2 piston system will do as well as an 8 piston system - thus BMW's decision with the 2 pots. What's the point on having 8 pot calipers when your 2 pot calipers can lock up the tires just fine? Just a guess. I remember reading an article in one of the magazines on why M decided to stick with the 2pots, I'll have to dig it up...
11-28-2006, 07:56 PM
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FWIW, i ran with some e60 m5's around some twisty mountain roads 2 wknds in a row recently. afterwards, one owner commentted that his brakes were fading and he was gonna look into getting brembos for his e60 m5.
i also remember when the e60 m5 came out that the british press (car, evo magazines, etc) were saying that if the m5 had a weak link, it'd be its brakes.
i also remember when the e60 m5 came out that the british press (car, evo magazines, etc) were saying that if the m5 had a weak link, it'd be its brakes.
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