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More Power. Howstuffworks.com. Increase displacement. More displacement means more power because you can burn more gas during each revolution of the engine This can be accomplished by making cylinders bigger or by adding more cylinders. Increase the compression ratio.

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more power

More Power

Howstuffworks.com

increase displacement
Increase displacement
  • More displacement means more power because you can burn more gas during each revolution of the engine
  • This can be accomplished by making cylinders bigger or by adding more cylinders
increase the compression ratio
Increase the compression ratio
  • Higher compression ratios produce more power, up to a point.
  • The more you compress the air/fuel mixture, however, the more likely it is to spontaneously burst into flame (before the spark plug ignites it).
  • Higher-octanegasolines prevent this sort of early combustion
put more into the cylinder
Put More into the cylinder
  • more air (and therefore fuel) into a cylinder
  • the same way that you would by increasing the size of the cylinder
  • Turbochargers and superchargers
  • See How Turbochargers Work for details
cool the incoming air
Cool the incoming air
  • Compressing air raises its temperature
  • you would like to have the coolest air possible
  • the hotter the air is, the less it will expand when combustion takes place
  • intercooler is a special radiator through which the compressed air passes to cool it off before it enters the cylinder
  • How Car Cooling Systems Work for details
let air come in more easily
Let air come in more easily
  • Air resistance can be lessened dramatically by putting two intake valves in each cylinder
  • Some newer cars are also using polished intake manifolds to eliminate air resistance there
  • Bigger air filters can also improve air flow.
let exhaust exit more easily
Let exhaust exit more easily
  • Air resistance can be lessened by adding a second exhaust valve to each cylinder
  • If the exhaust pipe is too small or the muffler has a lot of air resistance
  • High-performance exhaust systems use headers, big tail pipes and free-flowing mufflers to eliminate back-pressure in the exhaust system
make everything lighter
Make everything lighter
  • Lightweight parts help the engine perform better
inject the fuel
Inject the fuel
  • Fuel injection allows very precise metering of fuel to each cylinder
  • improves performance and fuel economy
  • See How Fuel Injection Systems Work for details
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