I'm trying to bring the stated 6500 rpm power curve down a bit and move it to even a better bottom rpm range. That's why I'm asking smarter people than myself.
Copper
2 degrees more advance will move peak power a couple hundred rpm down, but may increase cylinder pressure some due to closing the intake valve earlier. how critical is the use of pump gas? in my opinion i'd install the cam per cam card specs and work the ignition for more low end. perhaps a different cam profile would let you get closer to having your cake and eating it too.
