Small Block Weiand Action+ vs. Edelbrock RPM Air Gap ET/MPH Comparo

Understood! I interpreted it that there may have been a known setup that makes the RPM work better for every combination (speed secret, lol!) but it makes more sense for it to be combination specific. In a lighter car, lower gears and a larger cam would tend to work better with more plenum volume and heavier vehicles would benefit from cleaning up or increasing velocity of the low rpm airflow.