No you don't.
Increasing the bhp will increase the MAX speed of you car. The difference in real life will be that you will be hitting 70mph faster than previously, not that you will all of the sudden drive 140mph all the time, followed by a full stop for traffic lights.
Read your post twice seems to me you contradicting your opening line
it's not because your car CAN run faster that you WILL run it faster. I guess nobody here who installed a turbo kit installed it to get a higher max speed out of his car.
With that line of thinking all cars from Fiestas to Ferraris sold in the UK only require basic brakes suitable for hauling them down gently from 70 mph every now and again.
If you upgrade performance, it must follow that on a long stretch of country road your average speed and probably your peak speed will be greater i.e. you will achieve greater velocity between corners and therefore your brakes will take more abuse. Brake upgrades will not only haul you down from high speed quicker but will reduce fade over concerted hard driving such as this. That's of course without even mentioning track use....
Very well put and exactly the point.
We have done a lot of track evaluation using temperature strips over a wide range of brake products and with cars in various states of tune and it is for this reason we are confident in our reccommendations in this area.
The differences in the heat put into the brake system on a standard Evo for example over one with a mild increase in BHP are substantial and therefore require addressing if nothing else from a safety point of view.
We see it all too often that cars have power upgrades, turn up for a trackday, get two or three laps and then find the brakes are cooked and this is not only relative to track driving but also spirited road driving.
Take a look at any rally car for example in it's two main configurations ie gravel spec and tarmac spec and see the difference in the brake setup.