Le Mans Prototypes

Le Mans Prototypes are closed cockpit cars with no production minimum required. Generally produced for the FIA World Endurance Championship, which includes the 24 Hours of Le Mans / ELMS / IMSA races these cars are developed exclusively for on-track competitions, fulfilling the requirements of the Automobile Club de l’Ouest’s technical regulations. Because of their superior performances and level of technological development, they have a star status within endurance racing.

Prototypes are divided into two categories:

  • LMP1 - for Manufacturers
  • LMP2 - for teams independent of manufacturers and/or engine suppliers

“LE MANS" PROTOTYPE 1 category includes:

  • "LE MANS" PROTOTYPE 1 Hybrid: with Energy Recovery System (ERS).
  • "LE MANS" PROTOTYPE 1: with no Energy Recovery System (ERS) reserved only for private teams.

The LMP1 Private Teams category is reserved exclusively for independent private teams. A team that is independent of a manufacturer means a team that does not benefit from any support from a manufacturer other than for the single supply of engines, services relating to these engines or commercial support. Any support from a manufacturer relating to the chassis or to chassis systems is prohibited. It is understood that traction control is considered as a chassis system.

Characteristics

Engines

Engine is free except following restrictions:

  • Only Petrol or Diesel 4 stroke engines with reciprocating pistons are permitted.
  • Engine cubic capacity is free for LMP1-Hybrid cars
  • Engine cubic capacity must not exceed 5500 cm3 for LMP1 cars.
  • Engine use is limited to 5 engines for the complete season (all race events) per car entered.

Number panels

Pantone red 485, with white numbers

Driver Categories

Bronze drivers are not permitted

Minimum weight

878 kg for LMP1-Hybrid

833 kg for LMP1

Dimensions:

  • Wheelbase: Free but it must be identical to that registered in the Homologation Form
  • Overall length: 4650 mm maximum
  • The front overhang is limited to 1000 mm
  • The rear overhang is limited to 750 mm
  • Overall width: 1900 mm maximum and 1800mm minimum
  • Height: No part of the bodywork is permitted to be more than 1050 mm above the reference surface

Fuel Flow Metering:

A homologated "Fuel Flow Meters" sensor must be fitted which directly measures the fuel flow through the fuel feed line to the engine. By measuring the instantaneous flow the total fuel consumption can be calculated. The LMP1 will be constrained on both: fuel energy per lap and maximum instantaneous fuel flow.

Fuel Tank Capacity:

Petrol 62.3 litres with ERS, 75 litres with no ERS
Diesel 50.1 litres with ERS

Fuel Energy per Lap:

The fuel energy per lap is the total amount of fuel energy contained in the fuel mass allocated for one lap.

Technology Factor:

The Fuel Technology Factor is a function of the ratio of Diesel over Petrol engine efficiencies.
The K Technology Factor is a function of Diesel and Gasoline powertrain weight and ERS options.
Those factors are used to calculate the relation between diesel and gasoline allocated energy and maximum instantaneous flow.

Maximum instantaneous fuel flow:

The fuel flow is limited instantaneously and therefore limits the maximum engine power.