In regards to braking bias and the development we put into our kits I would like bring up a perfect example of the engineering that STILLEN/AP Racing put into the brake systems that we co-develop.
The Ford GT supercar comes from the factory with a Brembo brake system that for 95% of the owner's of that car will more than meet their needs. However, for the other 5% of the owner's of the car they need something better. In the early days of the GT one of the larger brake companies (who will remain unnamed) designed a front and rear big brake kit that in all honesty...was a pile of garbage. It was actually recommended that the kit be removed from the cars because the braking bias was so horribly thrown off. There were numerous cars equipped with this brake kit who would come into a corner and because of the horrible bias issues would spin off the race track.
In 2006 STILLEN produced a front brake kit for the GT that was slightly larger than stock and offered a 6 piston caliper, replacing the factory 4 piston. Then in 2008 (after MUCH testing and engineering) we released the rear brake kit to complete the package. The rear rotor was significantly larger and came with a 6 piston caliper. Because we had some concerns about the potential for altering the brake bias we played with quite a few things including piston sizes inside the caliper, types of rotors, and more. Working very closely with AP Racing and taking from the years and years of Sports car racing, championship winning experience of Steve Millen, we now have a brake system which is used by all of the serious Ford GT track guys. The final outcome was kind of odd. We found that for racing purposes, the best setup was to go with cross-drilled slotted front rotors and slotted only rear rotors, thus decreasing some of the initial bite of the rear rotors and therefore offsetting the bias issues. For the street, we recommend cross-drilled slotted fronts and matching cross-drilled slotted rears just for aesthetics.
Also, before releasing this brake kit for public use, Steve Millen and myself put it to the ultimate test on the 2008 Targa New Zealand Rally. We were not willing to sell this kit to anyone without testing it thoroughly for ourselves.
You can rest assured that we test and test and test all of our brake kits and all of our other products before they are released to the public.
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