The Toyota RI is a family of prototype four-stroke 2.0-litre single-turbocharged inline-4 racing engines, developed and produced by Toyota, for the Super GT series and Super Formula under the Nippon Race Engine framework. The RI engine is fully custom-built.[2][3]

Toyota RI
Overview
ManufacturerToyota Gazoo Racing
Production2014–present
Layout
ConfigurationInline-4
Displacement2.0 L (122 cu in)
Cylinder bore86–90 mm (3.39–3.54 in)
Piston strokeFree but typically approximately between 86–90 mm (3.39–3.54 in)
Cylinder block materialDie cast steel or aluminium alloy. Machining process from a solid is not permitted
Cylinder head materialDie cast steel or aluminium alloy
ValvetrainDOHC 16-valve (four-valves per cylinder)
Compression ratio15:1
Combustion
TurbochargerSingle-turbocharged by Garrett Advancing Motion with 3.5 bar (51 psi) of turbo boost pressure
Fuel systemBosch 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
ManagementBosch Motronic MS 7.4
Fuel typeVarious (102 RON unleaded racing gasoline)
Oil systemDry sump
Cooling systemSingle mechanical water pump feeding a single-sided cooling system
Output
Power output550–679.8 PS (542–671 hp; 405–500 kW)[1]
Torque output500–700 N⋅m (370–520 lbf⋅ft)
Dimensions
Length600 mm (23.62 in)
Width697 mm (27.44 in)
Height693 mm (27.28 in)
Dry weight187 lb (85 kg) including turbocharger

Versions

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The RI engine comes in two different versions for different applications; the RI4A for use in Super Formula and the RI4AG for use in Super GT.

  • RI4A (2014–present, also known as TRD-01F)[4]
  • RI4AG (2014–2023)
  • RI4BG (2024-present)

Applications

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See also

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References

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  1. ^ "Most Extreme Toyota Supra Ever Unveiled With 670hp". 12 January 2019.
  2. ^ "Toyota GR Supra GT500 Racecar Sounds Insane Testing for the 2020 Super GT Series". 28 December 2019.
  3. ^ "The Four-Cylinder 2020 Supra Super GT Car Sounds Bizarre". 27 September 2019.
  4. ^ "TOYOTA GAZOO Racing announces 2023 Super Taikyu teams, completes SUPER GT and Super Formula driver line-ups". 12 January 2023.
  5. ^ "A GT500 Racer in Detail". 26 May 2015.
  6. ^ "2014 Lexus RC F GT500 | Lexus". 22 April 2016.
  7. ^ "Dear Lord, It's the Lexus RC-F GT500". Top Gear. January 29, 2014.
  8. ^ "GR SUPRA | GT500". TOYOTA GAZOO Racing.