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
[edit]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
[edit]References
[edit]- ^ "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.
