This is not really worth the trouble if all you want to do is wear out tires and cause un stress to parts of your car.
If you insist though, you'll need a higher stall torque converter to go any higher than 2k RPMs.
What is happening is your putting all that load on the engine, and the torque converter is locking up at 2k rpms as it should, but because you're not going anywhere the car refuses to go higher or put out any more power. A Higher stall converter will let it go higher and thus letting it produce enough power to break the wheels free. Another option would be to also get a line lock on the front breaks, so that you're not burning out your back pair trying to do this, likely causing terrible wear and warping to your rotors.