Hmm...interesting. I tuned one a few weeks back that made 350whp on 17psi on pump gas...It has a hell of a powerband, and infact, I'd put it up against most of the SR's Ive done. I guess time will tell how durable the motor is with a good tune. Im tuning another RB at Batlground on Tuesday, this time an RB25, so Im gonna overlay the graphs and see how they compare with similair setups. Should be interesting...