check that all of the wheels are spinning freely, at least enough to not think that something is slowing one axle down more than the other. If the suspension is adjustable, make sure they are equal and not making the car stand lop-sided. If you dont know how to make sure its right, you can check out how to setup a car and in there you should find out how to do it, at least enough so that it doesnt significantly affect the car.
For the brakes, you probably just need to adjust them so that they grab better, but not too much so that the brakes are dragging along the drivetrain while it is idling or on throttle. Hope this helps.
Car-less (Velox V10 or 733) // RB T10.5"+" (JB Modified) // Bluebird BMS-990DMG (St) & BMS-631 (T/B) // ATS 16% // Capricorn Wheels // Protoform
"70% of the time, it works ALL the time"