As it accelerates the front of the car lifts up losing traction under the wheels (hense lifting the back up slightly to limit this helps) One of the more efficient ways to stop it doing that is by trying some suspension mods. Stiffer springs and different damper rates and heights all have some effect. Then as above tyres will help with grip, then the way the drivetrain distributes the power must have some effect too There are ways it just costs time and money Iv'e spent hours and hours just playing, but dont have a HIGH POWER car