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Rules - Four categories
The cars competing in the Le Mans 24 Hours are divided into 4 categories: LM P1 and LM P2 prototypes and LM GT1 and LM GT2 Grand
Touring Cars. The first 2 categories represent the quickest cars. Those competing in the Grand Touring Categories must be approved
road-going vehicles of which at least 100 have been built and commercialised (25 in the case of small manufacturers).
Air restrictors play an important role in the technical regulations. These are fitted in the inlet manifolds of all cars to balance
out power, and their diameters vary according to the engine's architecture, type of fuel feed and type of fuel for the Prototypes
and the weight for the Grand Touring cars.
Dimensions
| LM P1 | LM P2 | LM GT1 | LM GT2 | |
|---|---|---|---|---|
| Opened or closed cars. | Opened or closed car two doors Having an aptitude for sport. |
|||
| Overall lenght | 4650 mm | 4650 mm | Origin | Origin |
| Wheelbase | Free | Free | Origin | Origin |
| Overall width | 2000 mm | 2000 mm | Origin +150 mm | Origin + 100 mm |
| Overall heigth | 1030 mm | 1030 mm | Origin | Origin |
| Front overhang | 1000 mm | 1000 mm | Origin + 80 mm | Origin |
| Rear overhang | 750 mm | 750 mm | Origin | Origin |
Engine
| LM P1 | LM P2 | LM GT1 | LM GT2 | |
|---|---|---|---|---|
| Max cylinder (in cm3) | Race engine: 6000 petrol atmo 4000 petrol turbo 5500 turbo diesel GT1 engine: 7000 petrol atmo |
Race engine: 3400 petrol atmo/ 8 cyl. maxi 2000 petrol turbo/ 6 cyl. maxi Production engine: 4500 petrol atmo (homologated) 4400 diesel (origin series) |
Cylindrée mini : 5000 petrol atmo 3000 petrol turbo |
Cylindrée maxi : 5500 petrol atmo 3200 petrol turbo |
Transmission
| LM P1 | LM P2 | LM GT1 | LM GT2 | |
|---|---|---|---|---|
| Gearbox Drive train |
6 forward ratios maxi + reverse gear Four wheel drive prohibited |
|||
Brakes
| LM P1 | LM P2 | LM GT1 | LM GT2 | |
|---|---|---|---|---|
| Discs (material) | Free | Free | Free | Ferrous |
| Discs (diameter) | 15'' (380 mm) | 15'' (380 mm) | 15'' (380 mm) | |
| Brakes callipers | Only one calliper with 6 pistons per wheel | |||
Wheels
| LM P1 | LM P2 | LM GT1 | LM GT2 | |
|---|---|---|---|---|
| Overall width | 16'' | 14'' | 14'' | 12'' up de 1245 kg 14'' over de 1245 kg |
| Diameter | 28''5 | 28'' | 28'' | 28'' |
Minimum weight
| LM P1 | LM P2 | LM GT1 | LM GT2 | |
|---|---|---|---|---|
| 900 kg 930 kg diesel |
825 kg | 560 cv -> 1200 kg 600 cv -> 1250 kg |
1145 kg |
Carburant
| LM P1 | LM P2 | LM GT1 | LM GT2 | |
|---|---|---|---|---|
| Fuel tank capacity: | ||||
| Petrol | 90 litres | 80 litres | 90 litres | 90 litres |
| Gazole | 81 litres |
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