What is the proper way to launch with a stall converter when at the track? I had thought that you were supposed to put one foot on the brake and one foot on the gas and bring up the rpm's to the "stall speed" then dump it and leave. I was told by my engine builder that this is incorrect and probably why i broke my converter. He said that you sould just bring the rpms up slightly then "flash" the converter. Is this correct?

yea, bring it up a bit and let it flash - it hits the tires harder too.

It all depends on what you or your car needs to launch and get the best times or consistancy. Most converters will not come close to their rated stall speed by foot braking (unless you have extemely good brakes). As for as the torque converter goes, it should be able to handle leaving at any rpm up to it's rated stall speed, if not I would check into another brand. My converter has over 800 passes on it, and I leave at 3200rpm. When you get consistant on the light, you can use your stall speed to either increase or decrease your reaction times slightly. Flashing the converter from idle, or slightly above, will shock the tires harder (along with the rest of the drivetrain) but all other things being equal will give you a slower reaction time. Increasing your stall speed will not shock the tires as hard, but will generaly cause the car to react faster. You will just need to experiment with your car at the track.
P.S.- Many of the transbrake cars leave at five or six grand with no converter problems.

DR

An additional comment...
When you foot brake, you are also pre-loading the suspension and preventing it from working properly on launch.