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Wow -- listen to those crickets. You may have shell-shocked the troops.

In reading the two explanations I found one commonality: Phase 3B, which looks like the least important phase. Very curious. To further muddy the waters, racers I have talked to and at least one set-up article I read took the position that increased bump adds grip, up to a point. Perhaps these two articles are assuming the car is already set up (maximized bump for the chosen test scenario), and the tuning guide picks up at that point for the purposes of optimizing the vehicle in a particular environment.

I am also dubious about the 'added weight= less grip' axiom both these articles are predicated on. For one thing, the Lotus exhibits more tenacious grip (most notably in slow turns) when I have passenger onboard. Also, aerodynamic downforce increases grip. It may be that the force vector has a lot do with how the contact patch responds.

In any case, these two contending tuning philosophies need to be reconciled. Maybe we can find a tie-breaker.
 
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