Take a look at this thread in the V8 section.
Someone came up with the idea of using the P/N rev limiter as a Shudder box to get consistant launches. Turns out it won't work on the V8 but it is awsome on the V6. Here is my post from that thread:
I finally made it to the track and had a chance to test this idea.
WORKS GREAT.
Three runs, here are my 60 foot times.
2.149
2.184
2.181
Street tires and a V6.
They were the easiest launches I have ever had. No thinking, just let it bounce off the limiter and let the clutch off and floor it. A monkey could have done it (kind of like an automatic ;D )
It sure works for the V6. Maybe someone can figure out how to make it work on the V8.