HPD LM-V8 engine
Reciprocating internal combustion engine
From Wikipedia, the free encyclopedia
The HPD LM-V8 engine (also called the Acura/HPD LM-AR6 and Acura AL7R) is a naturally aspirated, four-stroke, 3.4-liter, V8 racing engine, designed and produced by Honda Performance Development (HPD) for use in multiple Le Mans Prototype race cars, from 2007 to 2013.[2][3][4]
| HPD LM-V8 engine Acura/HPD LM-AR6 engine Acura AL7R engine | |
|---|---|
| [1] | |
| Overview | |
| Manufacturer | Honda Performance Development |
| Production | 2007-2013 |
| Layout | |
| Configuration | V8, naturally-aspirated, 90° cylinder angle |
| Displacement | 3.4 L (3,397 cc) |
| Cylinder bore | 93 mm (3.66 in) |
| Piston stroke | 62.5 mm (2.46 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | 32-valve (four-valves per cylinder), DOHC |
| RPM range | |
| Max. engine speed | 10,000 rpm |
| Combustion | |
| Fuel system | Gasoline direct injection |
| Management | Continental/Acura ECU |
| Fuel type | VP MS100 E10, 100-octane gasoline + 10% ethanol (ALMS) |
| Oil system | Dry sump |
| Cooling system | mechanically water cooled |
| Output | |
| Power output | 480 hp (358 kW; 487 PS) |
| Torque output | 450 N⋅m (332 lb⋅ft) |
In its debut race at the 2007 12 Hours of Sebring, Andretti Green Racing finished first in the LMP2 class and second overall in an Acura ARX-01a-Courage chassis.[5]
Design
The LM-V8 was the first engine to be solely designed and developed by HPD in its facilities in Santa Clarita, California.[6] The engine is mated to a jointly developed HPD-Hewland 6-speed sequential with manual paddle-operated selection and breathes through a 40.7mm inlet restrictor.[7]
Achievements
American Le Mans Series Championships
| Year | Team | Chassis | Class |
|---|---|---|---|
| 2009 |  Lowe's Fernández Racing |
Acura ARX-01B | LMP2 |
| 2010 |  Patrón Highcroft Racing |
HPD ARX-01C | LMP |
| 2012 | Muscle Milk Pickett Racing |
HPD ARX-03a | P1 |
| 2013 | Muscle Milk Pickett Racing |
HPD ARX-03a | P1 |
Other Championships/Wins
| Year | Series/Event | Team | Chassis | Class | Note |
|---|---|---|---|---|---|
| 2010 | Le Mans Series |  RML |
Lola B08/80 | LMP2 | 1st in 1000 km of Algarve |
| 2010 | 24 Hours of Le Mans | Strakka Racing |
HPD ARX-01C | LMP2 | Qualified on class pole |