Having won the French endurance race last year, both Porsches struggled for pace compared to the other three GTE Pro manufacturers Aston Martin, Ferrari and Corvette.
The Manthey-run 911 RSR has carried 25kg [55lbs] of ballast since winning the opening round of the World Endurance Championship at Silverstone, while Aston Martin received two weight breaks in the build up to Le Mans that amounted to a 35kg [77lbs] loss.
Ferrari has a revised aerodynamic kit for this year despite an off-season freeze in aero development, while Corvette– which had only raced its new C7.R in the United States prior to last weekend – was given a series of breaks in comparison to last year.
Team boss Olaf Manthey had criticized the situation in the build-up to practice and qualifying and his drivers have since called for a re-evaluation from WEC and Le Mans organizers the Automobile Club de l'ouest.
"Maybe they [the ACO] should understand they must be careful not to penalize or advantage one car," said Makowiecki. "Sometimes if you work well you get penalized and it's not a positive thing. I like the challenge and to battle. If the engineers and driver do a good job they deserve to get a good result."
Holzer said he was happy that he, Makowiecki and third driver Richard Lietz had salvaged a podium and second-place WEC points (the Corvette is ineligible) from the weekend but agreed that something needed to be done for future rounds.
"It was a tough race," he added. "We pressed 120 percent out of the car [to finish third]. For sure you feel every kg of fuel, so I hope we get a little change for the next race." Racer.com