The torque numbers are right on. HP=(rpm*torque)/5252. the numbers match up,at peak power the equation says torque should be 196 and it is right there on the graph. The thing with that motor is it carries torque high in the rpm band and doesn't drop off, this would show the VE of the head/manifolding is very good and well over 100%.

Now I don't believe everything that is claimed by Larry Widmer but the guy who did the dynoing is very much an independent third party who is very trustworthy.