Quote:
Originally Posted by White 13
Lets forget about various ABS setups and different cars for a minute just to make a apples to apples comparison. If my M3 did one stop, full ABS, at minimum weight then with the same conditions tried it again with max weight shouldn't it take a longer distance to come to a stop?
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As I understand it the distance should essentially be the same up to a point. Extra weight will have an effect on the shape of the contact patch and how it interacts with the road surface - there is a weight on a tyre's contact patch which gives the optimum pressure (per unit of area) pressing the tyre against the road surface which then produces the maximum grip (the complex interaction between a braking tyre and the road surface is a book in itself). In principle extra weight on a tyre produces greater grip if the tyre is designed for it - think F1 where a car can brake at up to 6g at 220mph due to the tonnes of downforce produced by the cars aerodynamics. How extra weight would affect the tyres on an M3 is unknown but I suspect the tyres have quite a wide operating window. There will be also a crossover speed at which the min weight M3 can still fully activate the ABS down to 0mph while the max weight M3 will not be able to - pick a speed 150mph? I don't know...whatever that speed is, its the moment that a big brake kit would make a difference.
Quote:
Originally Posted by White 13
I hope I am not coming off a antagonistic. One of the reasons I am interested in the topic is I think you have Ross Bentley (Speed Secrets) on your side and I could not figure his point either. At any rate for me it is a fun discussion.
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Absolutely...I think I am right but I if I'm wrong I would rather find out so I'll know better for next time. Discussing and learning stuff is the best part of M3post.