Jon_Bmw wrote:Something you also need to consider is uprating the rear discs and calipers too. Its all very well having a huge setup on the front, but you need something to balance it out on the rear.
If your pedal movement has changed considerably with the bigger calipers then you'll also want to consider a different master cylinder.
I've always thought if the brakes are good enough to repeatadly lock the wheels at silly speeds(70+mph) then thats job done. Because if you go any bigger than that there is no point, as its then down to the grip of your tyres.
I have thought about uprating the rear discs and calipers, however a few people have advised me that it is unnecessary. You are the first to advise me otherwise. I think the ratio of front to rear depends on suspension (weight transfer during braking) as well as static front to rear weight distribution.
Installing bigger discs will of course eat into your acceleration, so I have decided to leave the rear standard and see how it works out once everything is done. If it turns out that bigger brakes are needed in the back, then I will address the issue later. Basically I believe what you're saying but am hoping that it is not necessary - I'll see.
Your suggestion with the brake booster is best answered with some pictures. The Tilton race pedal setup uses 3 individual master cylinders, viz. one for clutch, one for rear brake and one for the front brake. You can select from a big range of master cylinder sizes (strength) and you try to match to what your particular setup requires. In addition you have a second option to control brake bias front to rear with an adjustable lever on the brake pedal.
click images for larger view
close up view of the bias adjustment bar
view from engine bay, mounting will be onto roll cage that will also come through the hole cut into the firewall and support the strut tower
master cylinder
here is the pedal box with just one master cylinder installed
Lastly, while the standard brakes were quite satisfactory they were by no means awesome. They would have fared better when the car is lighter, however I still think they would not be as good as I want.
I used to be out-braked by a track prepared Honda Civic by a huge margin (both cars on identical semi-slicks). This guy was not faster on the straights nor could he carry more speed through the corner but he could pass me easily when braking from 140Km/h into a 50km/h tight corner. When racing on the track there is a big difference between adequate brakes and AWESOME brakes.
