Quote:
Originally Posted by Homemade WRX
Exactly because of the rulebook, they have a better (easier?) chance of winning...for the same reasoning they go NA because the rules are more strict on FI.
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In the classes the cars you cited compete in, NA is favored by the rules so they use NA. In the highest class, FI is favored, so everyone uses FI. The 787B did so well its first year it was immediately banned by the FIA. Point being, professional racers pick FI or NA based on which is going to be more likely to win, and in the classes where FI hasn't been regulated into obscurity it dominates.