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Message: <blockquote data-quote="alantiong" data-source="post: 708149" data-attributes="member: 19754">hmmm.. i like this roberto... he sure knows what is he talking bout..  wanna catch up for a cuppa sometimes??however, i have to disagree on rotor size. it does makes difference if the center of friction is further from the center of rotation. bigger pad surface area means more friction (Force, N). and bigger rotor means more leverage (distance, m).means, if i were to use same pads/calipers but bigger rotor, which naturally means i need to "extend" the calipers further from center. from a 300mm rotor to a 316mm, an extension of 8mm further, actually give you a (8/150)% more stopping power. going all technical in this, but i found that a lot of people measures their brakes with the ability to lock the wheels and make screeching marks on the tarmac..  for goodness sake.. its about stopping the car, not the wheels. when you lock the wheels, you get dynamic friction, which is lower than Static Friction if the wheel keeps rotating. and i do agree that E30, 32 34 were the fore runners of brakes in its era, except comparing to W126  which have the same  but 5 years earlier.i have driven enough E32/34 to know that it is not the best around. probably of weight especially on E32. i have the hydraulic assisted brakes which supposed to be superior but the beast is just too heavy. but saying that, i might be too optimistic to compare it to E39 and 38s.one more thing to look out for brakes issue in this generation is the accumulator or commonly called the bomb. if the internal bladder is punctured, you will have heavy brake. it looks like the accumulator for the hydraulic suspension too. located front left corner of the car.</blockquote>

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