[Barry_R]

The rotating mass might be important in an on/off throttle road race environment where instant response is an advantage for the driver. It is certainly important where the weight limits the potential for higher RPM in a professional race application due to durability concerns. But in a street oriented vehicle where RPM is limited by choice to +/-7000, it ain't gonna mean squat.

Its cylinder heads, intake, cam, and ring seal. For a few years at the Engine Masters we ran under rules that were scored by average power/torque divided by cubic inches. It compared every engine family prettey evenly against ever other. Last year we had LS1s going against FEs, going against 327 Chevys, going against Clevelands. It was pretty impressive to see how closely the various designs matched up considering how different they were on the outside.