Yeah that's what I have been thinking. I usually run a fairly restrictive exhaust and intake manifold in order to keep a flat hood and somewhat quiet. You mentioned compression. Does raising the compression raise or lower the rpm range. COMP claimed the cam I have now was good from 3500-6600. What I'm seeing if my Autometer tach is acurate is more like 2500-5700. I have my shift light set at 5500 and the shift is probly occuring around 5600-5700 because of the reaction time involved. When I shifted at higher rpm the et got slower. Take a look at the videos on you tube and you will see the car is very torquey and not a high revver.