I launch a car in a drag race without stalling?

You may need a torque lock to help you achieve this. A torque lock acts as a break to hold the car in place until a set amount of torque is applied to the drive line. it will then release, and you get the jump off the line. this frees up you gas foot so you can up your RPM's in to your power band. depending on your set up, it should start some where around 1700 to 2200. they also have front break locks that do the same thing if you have Front wheel drive. check out summit racing or manciney racing for parts and prices.