PPS rules start from the proposition that the 12 varied classes are designed to encourage performance through scratch building chassis innovations. What matters on the track is who can build the fastest chassis.
Motor performance is not a factor. By requiring stock bottom-line sealed 16Ds, motors and their costs are taken out of the equation. Everyone races with relatively equal cheap horsepower. Over the last 26 years small differences in the hundreds if not thousands of motors used have averaged out making varied weekly minor motor performance inconsequential. As with 1:1 racing many other factors, including luck, may play into a winning car. "Chicken one week-feathers the next," goes for each member- no one dominates.
The Pelican Park experience or magic comes from members who are first long time friends, then competitors. The notion that one would secretly, illegally tweak a motor, to cheat on his friends, to betray other members trust, just doesn't happen. The club's self enforcing rules are very "limited" with respect to motors.