Revving: Engine Simulator

Revving: Engine Simulator is a driving simulator built around engines whose sounds are generated live from their simulated physics. You start and operate engines, watch their parts move in 3D and drive the vehicles they power.

Engine physics and sound

Each engine simulates pistons, connecting rods, crankshafts, cams and valves, as well as gas flowing through the intake and exhaust and fuel burning in each cylinder. Its sound is synthesized from the exhaust pulses, so it responds to throttle, load, gear and RPM, as well as the rev limiter cutting in and VTEC crossing over. Each engine is paired with the kind of vehicle it powered, including that vehicle’s gearing, weight, aerodynamics, redline, rev limiter and top speed.

Start and drive

Switch on the ignition and hold the starter until the engine fires. You can use the clutch, brake and gas with an H-pattern gear lever; shifting without the clutch makes the gears grind. Alternatively, shift sequentially or use automatic transmission. The engine responds to stalling, bogging, hitting the limiter and launching.

Watch the engine

The 3D engine parts—including pistons, crank, cams, valve springs and headers—move in time with the sound. Point to a part to see its name, while coded colours show intake and exhaust flow. A driving-game HUD includes a rev counter with shift lights, a vehicle-scaled speedometer, live charts for manifold pressure, air flow and air/fuel ratio, and VTEC and limiter lamps. A full gauge cluster includes a firing lamp for every cylinder.

19 engines

The game includes 19 engines across a range of layouts:

• Honda B18C5: An inline-4 with VTEC to 8,400 RPM, in an Integra Type R.
• Chevrolet 454: A big-block V8 in a 1978 C20 pickup.
• Subaru EJ25: A flat-4 in an Impreza WRX STI.
• Harley-Davidson Shovelhead: A V-twin in an Electra Glide.
• Audi inline-5: In a Coupe quattro 20V.
• Toyota 2JZ: An inline-6 in a Supra.
• GM LS: A V8 in a C5 Corvette.
• Ferrari F136: A flat-plane V8 that reaches 9,000 RPM, in a 458 Italia.
• Lexus LFA V10: Reaches 9,000 RPM.
• Ferrari 412 T2 V12: A 1995 Formula 1 engine that revs to 17,000 RPM.
• Radial 5 and Radial 9: Aero engines mounted on a propeller.
• Ariel Square Four: Two twins geared together, in a 1950s motorcycle.
• Volkswagen VR6 and W12: The VR6 is in a Golf VR6; the W12, made of two VR6 engines, is in a Phaeton.
• BRM H16: Two flat-eights geared together, in the 1966 P83 Formula 1 car.
• Rolls-Royce Vulture X24: Mounted on an Avro Manchester’s propeller.
• Junkers Jumo 205: An opposed-piston, two-stroke diesel aero engine.
• Napier Deltic: Eighteen cylinders arranged in a triangle, as in the British Rail Class 55.

Audio and graphics settings

Audio quality ranges from Low to Ultra, with higher settings adding simulation detail for more detailed sound, subject to your CPU’s capacity. A load meter shows how hard the CPU is working. Graphics settings range from Low to High, with worn metal, shadows and smooth edges at the top setting.