IMSA has announced changes to their Prototype class Balance of Performance levels for the penultimate round of the season at Weathertech Raceway Laguna Seca.
All of the global LMP2 cars, now all ORECA 07-Gibsons thanks to PR1’s switch from a Ligier JS P217, will enter the weekend with a weight increase, and a smaller fuel tank.
10 kilograms will be added to each chassis, bringing their minimum weight up to 940 kilograms, and their fuel tanks will also be slashed by three litres.
The last time the Prototpyes were in action, was at Road America, a race that was won on fuel mileage by the #54 CORE Autosport ORECA 07, with the JDC-Miller Motorsports #99 ORECA 07 coming home in second.
A DPi has not won in the Prototype class since Belle Isle on June 2nd. All of the DPis will have an extra two litres in their tank, with the Mazda RT-24P also being given a 10-kilogram weight reduction on top of that.
“We’ve seen the P2 platform develop in terms of performance,” said IMSA Senior Director, Technical Regulations and Compliance, Geoff Carter, who also serves as the chairperson of the IMSA Technical Committee. “Even though it’s a spec platform, we’ve seen the car and the performance increase as (the competitors have) become more familiar with them.
“Instead of just turning up the DPis over and over, we felt it was time to put a limit on the reference platform.”
The penultimate round of the IMSA Weathertech Sportscar Championship at Laguna Seca is set to be held on September 7-9.