As clearly stated at the linked web site in the very first post. Class winner was a similar size engine with more camshaft and not a lot more power. It seems to me that 3k-6k is too high for daily driving and too low for a race engine. I'm not an EM geek but have looked over results and specs and it seems that most engine builders use similar camshaft durations, I assume to tune where the torque and power peaks are to best fit the specified rpm range. I wonder if another 15-degrees of duration would have produced the same power and torque as the other guys.