Restrictor Stealth
IMSA Memo 9-13 reduces the minimum weight of Porsche’s GT3 RSR to 1245 kilos. That should raise eyebrows, since it’s previous minimum was 1250. Five Kg? A reduction for the car that’s won four in a row? Murphy’s smarter friends think they have it figured out. The ACO’s restrictor table breaks at 1245, meaning that a car running that minimum is required to use smaller restrictors (28.6 versus 29.1). So by taking off weight, the Porsche loses power. Everybody else – including Corvette – gets closer to the leader on the track. (more…)