I'm a big fan of Andy Finkbeiner (Mopar BB Guru) and have read much of the material he publishes. From what I'm able to gather the mill work reduced the air velocity by enlarging the ports some what. The increased port flow was not taken advantage of by the use the more aggressive cam used by the 550hp motor. To me it would not be unreasonable to imagine that the CNC work could of had effected the ports by 3-5%. My calculator shows about a 4.4% increase in HP and a 4.6% decrease in torque. Numbers seem to bear out my supposition. I'll see if I can talk to a knowledgeable engine builder here in town and get his opinion. CME expected a 10 - 15 hp increase using the CNC heads but no one thought that it would have any noticeable effect on torque. Best laid plans of mice and men! :oops:
