Honda HR35TT engine
| Honda HR35TT engine Acura AR35TT engine | |
|---|---|
| [1] | |
| Overview | |
| Manufacturer | Honda Performance Development |
| Production | 2014– |
| Layout | |
| Configuration | V6, twin-turbocharged, 60° cylinder angle |
| Displacement | 3.5 L (3,500 cc) |
| Cylinder bore | 89 mm (3.50 in) |
| Piston stroke | 93 mm (3.66 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | 24-valve (four-valves per cylinder), SOHC |
| Compression ratio | 11.5:1 |
| Combustion | |
| Fuel system | Gasoline direct injection |
| Management | HPD/McLaren |
| Fuel type | VP Racing Fuels E10 100-101 octane gasoline + 10% ethanol |
| Oil system | Dry sump |
| Cooling system | mechanically water cooled |
| Output | |
| Power output | 600 hp (447 kW; 608 PS) @ 8,500 rpm |
| Torque output | 500 lb⋅ft (678 N⋅m) @ 6,000 rpm |
| Chronology | |
| Predecessor | Honda HR28TT |
| Successor | Acura AR24e |
The Honda HR35TT engine (also called the Acura AR35TT) is a twin-turbocharged, four-stroke, 3.5-liter, V6 racing engine, designed and produced by Honda Performance Development (HPD) for use in multiple race cars, from 2014.
Overview
The HR35TT, like its predecessor HR28TT, is derived from the production J35 family of engines found in numerous Honda/Acura production vehicles.[2] It features steel crankshaft and rods, dry sump oiling, direct fuel injection and HPD/McLaren engine management.[3] The HR35TT is designed to produce roughly 600 hp (450 kW) at 8,500 rpm and 500 lb⋅ft (680 N⋅m) at 6,000 rpm.[4] The engine made its debut at the 2014 12 Hours of Sebring in a Starworks Motorsport-run Riley MkXXVI.[5] When it was used in the Acura ARX-05, it was dubbed the AR35TT.[6]
Applications
References
- ^ "Honda HR35TT Twin-Turbo V6 engine". hondaracing-us.honda.com. Retrieved January 10, 2026.
- ^ "Acura Reveals Striking ARX-05 Prototype Race Car in Monterey; Debut Set for Daytona". Acura Newsroom. August 18, 2017. Archived from the original on January 11, 2026. Retrieved January 11, 2026.
- ^ Magda, Mike (February 24, 2014). "Honda Builds 3.5-liter Twin-turbo V6 for Daytona Prototype Cars". EngineLabs. Archived from the original on November 29, 2025. Retrieved January 11, 2026.
- ^ "Acura ARX-05 specs, lap times, performance data". FastestLaps.com. Archived from the original on October 9, 2025. Retrieved January 11, 2026.
- ^ "HPD Unveils 3.5 Liter Prototype Engine". hondaracing-us.honda.com. February 20, 2014. Archived from the original on January 11, 2026. Retrieved January 10, 2026.
- ^ "How Acura Turned a Minivan into an IMSA Prototype". THE SHOP. October 4, 2019. Archived from the original on October 14, 2019. Retrieved January 11, 2026.