TUDOR United SportsCar Championship; IMSA Makes Sweeping Changes in GT Daytona Class
North America’s premier sports car racing series, the IMSA TUDOR United SportsCar Championship, is closing in on its return to Mazda Raceway Laguna Seca for its second season of unparalleled action with the Continental Tire Monterey Grand Prix powered by Mazda, May 1-3.
The IMSA TUDOR Championship highlights the full weekend of on-track activities, with four classes competing together, Sun., May 3, for the overall win as well as class victories on Mazda Raceway’s iconic 11-turn, 2.238-mile road course. The exotic Prototype (P) class showcases the two-hour, forty-minute race though the competition will be just as fierce throughout the Prototype Challenge (PC), GT Le Mans (GTLM) and GT Daytona (GTD) classes. The sights and sounds of the Prototypes, including the Mazda SKYACTIV-D Diesel, on track at the same time as Porsche, Ferrari, Chevrolet, BMW, Audi, Aston Martin, Dodge, Honda and Ford, is truly a spectacle to be witnessed first-hand. Green-flag racing is scheduled to begin at 1:05 p.m.
The IMSA Continental Tire SportsCar Challenge showcases Saturday’s schedule. Outstanding door-to-door racing in both the Grand Sport (GS) and Street Tuner (ST) classes will be nonstop from the wave of the green flag at 1:30 p.m. until the checkered flag flies two hours and thirty minutes later. Cars in both classes begin life as production vehicles from worldwide manufacturers, with only safety and minor performance modifications allowed.
And if that wasn’t enough, the Lamborghini Blancpain Super Trofeo North America and the Playboy Mazda MX-5 Cup will have two races each, one each on Saturday and Sunday.
IMSA Announces Sweeping Changes for Mazda Raceway Laguna Seca Round
Racer Magazine reports that IMSA has made significant changes to the Balance of Performance tables that adjust the competitive abilities of each chassis in the TUDOR United SportsCar Championship’s GT Daytona class for next week’s event at Mazda Raceway Laguna Seca.
All six manufacturers with cars in the GTD class have received adjustments to the weight, engine air restrictor, engine RPM, aerodynamics, fuel tank capacity, or refueling tank flow rates ahead of the Continental Tire Monterey Grand Prix Powered By Mazda. Furthermore, the changes have been made under IMSA’s new approach to BoP alterations where a panel, led by IMSA technical director Geoff Carter, which also includes the manufacturers, arrives at the final specifications for each chassis. The previous process, by comparison, was far less inclusive.
Aston Martin’s V12 Vantage will lose 10 kilos, dropping its minimum weight to 1255kgs. It will also lose 2 liters of tank capacity, racing with a maximum of 96 liters of fuel.
Audi’s challenged R8 LMS will lose 25 kilos, dropping its minimum weight to 1305kgs. Its V10 engine will breathe easier thanks to a total 4.6mm increase of airflow through its twin restrictors. It will also gain 7 liters of tank capacity, racing with a maximum of 110 liters of fuel.
BMW’s struggling Z4 will lose 25 kilos, dropping its minimum weight to 1260kgs. Its V8 engine will breathe much easier thanks to a 19mm increase of airflow through its single restrictor. The use of dual dive planes will also be permitted.
Dodge’s rapid Viper will gain 30 kilos, raising its minimum weight to 1405kgs.
Ferrari’s flagging F458 Italia has received the highest volume of BoP adjustments. The Italian coupe will lose 20 kilos, dropping its minimum weight to 1320kgs, and gain 150RPMs, raising the redline to 8300. Fuel capacity moves up 5L to 100 liters, and its refueling will take less time, thanks to a 1mm improvement in flow restriction.
Porsche’s 911 GT America will lose airflow to its flat-6 engine by 10.5mm through its lone restrictor.
Practice for Round 4 of the TUDOR Championship starts Friday, May 1.
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