The only way a car will steer under any kind of braking is if the front wheels are turning. If you locked up the front wheels and turned them, the wheels would turn for sure. But the car would continue in a straight line. Hence the invention of ABS. I run my brakes 80% up front and 20% in the rear. I don't want lockup either up front or in the rear. I put so much emphasis on the front of my buggy. I have heavier diff oil up front than in the rear, heavier braking up front than in the rear. All of my control for my driving style demands alot of control up front. Under any kind of braking, but more importantly heavy braking, weight will shift forward placing more weight bias up front and less on the rear.
If your setup had more brake in the rear and less in the front and you had to brake hard, the weight transfer would cause your setup to be counterproductive. Look at many of todays passenger vehicles. Large, vented dual disks up front. Small, single, un-vented in the rear. The standard in the automotive industry is 5-10% more bias up front. But hey, these are nitro buggies. And most important of all ...... Brakes don't stop cars ......... Tires do !! Choose them well.
