Also I just got done watchin horsepower tv. Now I know that these guys tend to go overboard and a lot of times go a lot farther then most guys can considering our budgets. But awhile back they did a build up of a newer ls1 camaro. If u ask me, a great platform for goin fast. I just watched them slap on a procharger to a bolt on ls1. At first pull, they made around 400hp at the wheels. They leaned out the mixture up top in the rpms and got 451hp. They did a little more and got 491hp. Then last they added 1* to timing to see what would happen. They got 541hp at the wheels. That's right around 600 at the crank. Not too friggin bad if u ask me.