## What Size Engines Are in Indy Cars?
Indy cars are the fastest and most powerful open-wheel race cars in the world, and their engines are a major part of their success. Indy car engines are typically smaller than those found in other forms of motorsport, but they produce more power per liter. This is due to a combination of factors, including the use of high-revving engines, lightweight materials, and advanced engineering.
### Engine Size
The current Indy car engine is a 2.2-liter, twin-turbocharged V6 engine. This engine is produced by Honda and Chevrolet, and it produces approximately 700 horsepower. The engine is limited to 12,000 rpm, and it uses a single turbocharger per bank of cylinders.
The previous Indy car engine was a 2.65-liter, normally aspirated V8 engine. This engine was produced by Ilmor and Chevrolet, and it produced approximately 650 horsepower. The engine was limited to 10,000 rpm, and it used two turbochargers.
### Power Output
The current Indy car engine produces more power per liter than any other engine in motorsport. This is due to a combination of factors, including the use of high-revving engines, lightweight materials, and advanced engineering.
The high-revving engines allow the Indy car to produce more power at a given speed. The lightweight materials reduce the overall weight of the car, which makes it more agile and faster. The advanced engineering helps to improve the efficiency of the engine, which allows it to produce more power with less fuel.
### Fuel Efficiency
The current Indy car engine is also more fuel efficient than the previous engine. This is due to a combination of factors, including the use of direct injection and variable valve timing.
Direct injection allows the fuel to be injected directly into the combustion chamber, which helps to improve combustion efficiency. Variable valve timing allows the engine to adjust the timing of the valves, which helps to improve fuel efficiency and power output.
### Conclusion
The Indy car engine is a marvel of engineering. It is the most powerful and efficient engine in motorsport, and it helps to make the Indy car the fastest and most exciting race car in the world.
### Additional Information
**Here are some additional details about the Indy car engine:**
* The engine is mounted in the rear of the car, and it drives the rear wheels.
* The engine is lubricated by a dry sump oil system.
* The engine uses a carbon fiber intake manifold.
* The engine has a maximum boost pressure of 1.6 bar.
* The engine has a specific power output of approximately 315 horsepower per liter.
* The engine is capable of reaching speeds of up to 230 mph.
