The Alley

Rain may open door for Michelin GTLM runners

MichelinTires_01If Saturday morning’s wet conditions are a fair indicator, the battle at the front of the Sahlen’s Six Hours of The Glen could become more crowded if rain arrives during today’s race.

Track conditions were sunny and dry for Friday’s pair of TUDOR United SportsCar Championship practice sessions which saw a gap of six seconds per lap (1 minute 38 seconds vs. 1 minute 44 seconds) from the Prototype entries led by the Michael Shank Racing Honda HPD Ligier, which has led every session, to the production-based GTLM front-runners.

That six second gap narrowed dramatically in the wet conditions during Saturday’s third practice session as the Michelin-fitted GTLM class Porsche 911 RSR driven by Le Mans winner Nick Tandy cut the gap to just 1.09 seconds.  A similar situation appeared on a nearly dry track in Sunday morning’s warmup.

The IMSA timing reports on Saturday showed the Prototypes turned laps in wet conditions that were 20 seconds slower than in the dry conditions. By comparison, the factory-linked Michelin GTLM technical partner teams from Porsche North America, Corvette Racing, BMW Team RLL, and Risi Competizione were just 15-16 seconds off their dry track times.

Michelin teams utilize an innovative wet tire design that minimizes hydroplaning while maximizing the amount of rubber in contact with the track.

“Our current wet tire was developed to provide improved handling and grip while also extending tread life, and it appears to be working well here at Watkins Glen,” said Chris Baker, director motorsport, Michelin North America.

PorscheCorvetteSpray_01The Michelin technical partner GTLM teams will also have the option of a truly uniquely Michelin “cool damp/drying track” solution, a slick tire optimized to deliver performance during damp or drying track conditions without being equipped with traditional grooves or sipes.

Utilizing a special compound that Michelin engineers initially developed for the snowy roads in Nordic climates helps these slick tires quickly achieve effective operating temperatures. Michelin first used slick tires on snowy and cold stages in FIA World Rally Championship competition more than 20 years ago.

The latest race versions of the damp/dry slick tire have been used with considerable success in the FIA World Endurance Championship. Depending upon track conditions and team strategies, they could make their first appearance in TUDOR Championship competition here. Some elements of the damp/drying slick are already used in some Michelin consumer tires

“Our focus is on providing our technical partner teams with the best possible performance and on developing future tires based upon what we learn in competition,” said Baker. “GTLM is the only class in the TUDOR Championship offering open tire competition and these types of technologies are very relevant in developing future tires for real world consumers and families.”

While the Prototype cars enjoy a significant aerodynamic and braking advantage, history indicates that in longer races, such as today’s Sahlen’s Six Hour of The Glen, GT cars can be highly competitive. Through the years, Corvette, Viper and Porsche have all claimed overall victories in The Rolex 24 At Daytona.

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