to brake boost, that's why it looks like his turbos are very responsive, and on top of that I was leaking 10psi of boost, Which is like 100-150Rhwp. I was running extremely rich because of the boost leak killing power, specifically torque in the mid range. He raced the Zx10R, the same bike I ran later that night, and lost by about 10 car lengths. Had I had my full 36 psi of boost and brake boosted to around 25psi I would have killed it by a lot more.