200whp

ORIGINAL: ricky0323

so i guess the bbk upgrade is a no brainer then definetly doing it!!!!!!!!


any input on my other question?

Tires stop a car, not brakes. Even if that's a broad statement, full of caveats and qualifiers, it contains a crucial truth. All things being equal, stopping distance is stipulated by how much grip the tires have before they're finally overcome by braking torque, resulting in wheel lock. For those with ABS, the surest and simplest way to reduce dead-stop braking distance is a simple matter of stickier tires.

In order to maximize stopping performance, each tire should be just near its limits of grip in deceleration. Most cars off the showroom floor have a front-biased brake system, which is much safer for the average driver in a panicked braking situation-more rear bias at the limits of grip will cause the car's tail to get loose, even in a straight line. Not a good thing when braking and turning at the same time, unless you're doing it deliberately on a track.

ORIGINAL: pyropenguin


I have some input, don't get a bbk unless you're going to upgrade your rear callipers and rotors.

Upgrading just the front calipers will screw up the brake balance (the front will clamp way harder than the rear) and wont improve your braking distance. Change the fluid, get some nice pads, and go with an A8 upgrade up front.

ORIGINAL: cincyTT
Yeah, i have to totally disagree here. The front already does the majority of the braking. Increasing it will improve braking and do nothing to harm braking bias. Speaking from experience, not guessing.

As braking force is continuously increased, one end of the car must eventually break traction. If the front wheels lock up and turn into little piles of molten rubber first we say that the car is “front biased”, as the front tires are the limiting factor for deceleration. In the not-so-desirable situation where the rear tires are the first to lock we say that the car is “rear biased”, but the driver would probably have a few more choice adjectives to add. In either case, however, one end of the car has given up before the other, limiting the ultimate deceleration capability of the car. Just like the car that pushes its way through corners all day long, a car which is heavily front biased will be slow and frustrating, but relatively easy and benign to drive. On the other hand, like the oversteer monster that people are afraid to even drive around the paddock, a car which is severely rear biased will be a scary, twitchy ride resulting in a bad case of the white-knuckle syndrome. Envision an imaginary co-pilot yanking up on the park brake handle in the middle of every corner, and you begin to get the idea. While a rush to drive at speed, it will be horribly slow on the stopwatch. The car with perfectly balanced brake bias will, however, be the last one to hit the brakes going down the back straight. By distributing the braking forces so that all four tires are simultaneously generating their maximum deceleration, stopping distance will be minimized and our hero will quickly find his way to victory lane. Just like neutral handling, balanced brake bias is our ticket to lower lap times. All that said, once the braking system has achieved its perfect balance, it is still up to the tires to generate the braking forces. It’s still the tires that are stopping the car, but a poorly designed braking system can lengthen stopping distances significantly, expensive sticky tires or not.

So, what have we learned? As Figure 7 illustrates, every car has a “sweet spot” for brake bias which will generate the shortest stopping distances possible. Typically, the auto manufacturers design their cars to be 5% to 10% more front-biased than optimum for maximum deceleration, but they provide enhanced brake stability in return. Not a bad trade-off for the public at large, and not necessarily a bad place for a race car in the heat of battle either.

ORIGINAL: pyropenguin

Wait a second, you guys are talking about the A8 rotor upgrade as the BBK?

I thought you meant an actual bbk from stoptech/brembo/alcon. hahahah, I even said in my first post he should do that upgrade...

Anyways, you have wilwoods on your TT? I've never seen anybody run those on their A4, how do you like them?