Honda HR-414E/HR-417E/HR-420E engine

The Honda HR-414E, HR-417E and Honda HR-420E are a series of prototype, four-stroke 2.0-litre single-turbocharged inline-4 racing engines, developed and produced by Honda for the Super GT series and Super Formula under the Nippon Race Engine framework. The HR-420E engine is fully custom-built.

Honda HR-414E/HR-417E/HR-420E
Overview
Manufacturer	Honda
Production	2014-present
Layout
Configuration	Inline-4
Displacement	2.0 L (122 cu in)
Cylinder bore	86–90 mm (3.39–3.54 in)
Piston stroke	Free but typically approximately between 86–90 mm (3.39–3.54 in)
Cylinder block material	Die cast steel or aluminium alloy. Machining process from a solid is not permitted
Cylinder head material	Die cast steel or aluminium alloy
Valvetrain	DOHC 16-valve (four-valves per cylinder)
Compression ratio	15:1
Combustion
Turbocharger	Single-turbocharged by Garrett Advancing Motion with 3.5 bar (51 psi) of turbo boost pressure
Fuel system	Bosch HDEV6 350 bar (5,076 psi) central high-pressure gasoline direct fuel injection. One direct injector per cylinder fed by an engine-driven high-pressure fuel pump
Management	Bosch Motronic MS 7.4
Fuel type	Various (102 RON unleaded racing gasoline)
Oil system	Dry sump
Cooling system	Single mechanical water pump feeding a single-sided cooling system
Output
Power output	550 PS (542 hp; 405 kW)
Torque output	> 490 N⋅m (360 lbf⋅ft)
Dimensions
Length	600 mm (23.62 in)
Width	697 mm (27.44 in)
Height	693 mm (27.28 in)
Dry weight	187 lb (85 kg) including turbocharger

Versions

• HR-414E (2014–2016)
• HR-417E (2017–present)
• HR-420E (2020–present)

Applications

• Dallara SF14
• Dallara SF19
• Dallara SF23
• Honda NSX Concept-GT
• Honda NSX-GT
• Honda NSX-GT "Type S"
• Honda Civic Type R-GT

See also

• Toyota RI engine, similar engine also developed under the Nippon Race Engine framework
• Nissan NR engine, similar engine also developed under the Nippon Race Engine framework