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IMSA 101: Class relapse for 2018 WeatherTech SportsCar Championship season

Prototype

This is a flagship class, and a usually one of a 3 that doesn’t start out as a prolongation car. There are dual opposite Prototypes: those that belong to a World Endurance Championship “LMP2” model, that stands for Le Mans Prototype 2, and a DPi, that stands for Daytona Prototype international.

The LMP2 is authorised for a 24 Hours of Le Mans (as prolonged as it has a Gibson engine, a usually powerplant authorised for LMP2 cars by a WEC). The “P2” differs from a some-more outlandish “P1,” that is a tip category during Le Mans. The DPi is really similar—in fact, it takes a lerned eye to tell an LMP2 from a DPi—but was grown for IMSA competition. Unlike a WEC, IMSA allows for opposite engines.

There’s a aforementioned Gibson, a routinely aspirated 4.5-liter V8; a Mazda, a 2.0-liter turbocharged four-cylinder; a Cadillac, a routinely aspirated 5.5-liter V8, down from 6.2 liters in 2017; a Nissan, a 3.8-liter turbocharged V6; and a Acura, a 3.5-liter turbocharged V6. Despite a differences, all a engines are governed by IMSA to around 600 hp. The framework on both forms of automobile are carbon-fiber monocoque (the strange IMSA Daytona Prototypes were tube-framed) with a sum weight of only over a ton. 

Corvette Racing - pic23

Corvette Racing’s Chevrolet Corvette C7.R and drivers Antonio Garcia, Jan Magnussen, Mike Rockenfeller will be a group to watch in a GT Le Mans category during a Rolex 24. Photo by LAT PHOTOGRAPHIC

GT Le Mans

Scuderia Corsa

Scuderia Corsa’s Ferrari 488 GT3 will be driven in a Rolex 24 GT Daytona category by Cooper MacNeil, Alessandro Balzan, Gunnar Jeannette and Jeff Segal. Photo by LAT PHOTOGRAPHIC

GT Daytona

These cars are built to a tellurian FIA “GT3” specification, authorised for dozens of competition array worldwide, and are sole by a manufacturers as race-ready models. Cars authorized by IMSA embody a Acura NSX GT3, Aston Martin Vantage GT3, Audi R8 LMS GT3, BMW M6 GT3, Ferrari 488 GT3, Lamborghini Huracán GT3, Lexus RF GT3, Mercedes AMG-GT3, Nissan GT3-R and Porsche 911 GT3-R. Porsche, Nissan and Acura use six-cylinder engines; Aston Martin uses a V12; Audi and Lamborghini use V10s (basically a same engine) and BMW, Lexus and Mercedes use V8s, all with about 500 hp.



By Steven Cole Smith

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