launch rpm

I'm curious as to what you want to accomplish? I'm guessing you're foot braking? If you're running brackets and trying to be competitive, just slightly play with a few hundred rpm's and your staging depth to get the best reaction times that you can comfortably repeat over and over. That's where these races are won.

If you just go out to make some quick runs and have fun, as long as you have good bite and good brakes, i'd try loading that baby up as hard as you can against the converter a few runs and see what happens?

Your flashing the converter now, and that usually gets you the most stall, but depending on how well your chassis works, going hard and preloading everything may get you a little more 60' and et. I've run a few 12sec cars with moderate converters similar to yours and got the best times loading them hard. It really depends on what your after and how the car's setup works. Most cars react differently, so just give some things a try.