(�`�._.�[��V��]�._.���) Producing More Engine Power

[Pratham]

 
Producing More Engine Power          Horsepower  For a complete explanation of 
what horsepower is and what horsepower means, check out How Horsepower Works.   
    Using
all of this information, you can begin to see that there are lots of
different ways to make an engine perform better. Car manufacturers are
constantly playing with all of the following variables to make an
engine more powerful and/or more fuel efficient. Increase displacement
- More displacement means more power because you can burn more gas
during each revolution of the engine. You can increase displacement by
making the cylinders bigger or by adding more cylinders. Twelve
cylinders seems to be the practical limit.   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-octane gasolines prevent this sort of early combustion. That is
why high-performance cars generally need high-octane gasoline -- their
engines are using higher compression ratios to get more power.   Stuff more 
into each cylinder
- If you can cram more air (and therefore fuel) into a cylinder of a
given size, you can get more power from the cylinder (in the same way
that you would by increasing the size of the cylinder). Turbochargers
and superchargers pressurize the incoming air to effectively cram more
air into a cylinder. <!--
D(["mb","\u003c/div\u003e  \u003cdiv\u003e\u003cstrong\u003eCool 
the incoming air\u003c/strong\u003e - Compressing air raises its temperature. 
However, you would like to have the coolest air possible in the cylinder 
because the hotter the air is, the less it will expand when combustion takes 
place. Therefore, many turbocharged and supercharged cars have an 
\u003cstrong\u003eintercooler\u003c/strong\u003e. An intercooler is a special 
radiator through which the compressed air passes to cool it off before it 
enters the cylinder.  \u003c/div\u003e  \u003cdiv\u003e\u003cstrong\u003eLet 
air come in more easily\u003c/strong\u003e - As a piston moves down in the 
intake stroke, air resistance can rob power from the engine. 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. \u003c/div\u003e  
\u003cdiv\u003e\u003cstrong\u003eLet exhaust exit more 
easily\u003c/strong\u003e - If air resistance makes it hard for exhaust to exit 
a\n cylinder, it robs the engine of power. Air resistance can be lessened by 
adding a second exhaust valve to each cylinder (a car with two intake and two 
exhaust valves has four valves per cylinder, which improves performance -- when 
you hear a car ad tell you the car has four cylinders and 16 valves, what the 
ad is saying is that the engine has four valves per cylinder). If the exhaust 
pipe is too small or the muffler has a lot of air resistance, this can cause 
back-pressure, which has the same effect. High-performance exhaust systems use 
headers, big tail pipes and free-flowing mufflers to eliminate back-pressure in 
the exhaust system. When you hear that a car has \u0026quot;dual 
exhaust,\u0026quot; the goal is to improve the flow of exhaust by having two 
exhaust pipes instead of one. \u003c/div\u003e  
\u003cdiv\u003e\u003cstrong\u003eMake 
everything lighter\u003c/strong\u003e - Lightweight parts help the engine 
perform better. Each time a piston changes direction, it uses up energy to stop 
the travel in one direction and start it\n in another. The lighter the piston, 
the less energy it takes. \u003c/div\u003e  
\u003cdiv\u003e\u003cstrong\u003eInject the fuel",1]
);

//-->  Cool the incoming air
- Compressing air raises its temperature. However, you would like to
have the coolest air possible in the cylinder because the hotter the
air is, the less it will expand when combustion takes place. Therefore,
many turbocharged and supercharged cars have an intercooler. An intercooler is 
a special radiator through which the compressed air passes to cool it off 
before it enters the cylinder.    Let air come in more easily
- As a piston moves down in the intake stroke, air resistance can rob
power from the engine. 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
- If air resistance makes it hard for exhaust to exit a cylinder, it
robs the engine of power. Air resistance can be lessened by adding a
second exhaust valve to each cylinder (a car with two intake and two
exhaust valves has four valves per cylinder, which improves performance
-- when you hear a car ad tell you the car has four cylinders and 16
valves, what the ad is saying is that the engine has four valves per
cylinder). If the exhaust pipe is too small or the muffler has a lot of
air resistance, this can cause back-pressure, which has the same
effect. High-performance exhaust systems use headers, big tail pipes
and free-flowing mufflers to eliminate back-pressure in the exhaust
system. When you hear that a car has "dual exhaust," the goal is to
improve the flow of exhaust by having two exhaust pipes instead of one.
  Make everything lighter
- Lightweight parts help the engine perform better. Each time a piston
changes direction, it uses up energy to stop the travel in one
direction and start it in another. The lighter the piston, the less
energy it takes.   Inject the fuel<!--
D(["mb","\u003c/strong\u003e - Fuel injection allows very 
precise metering of fuel to each cylinder. This improves performance and fuel 
economy. \u003c/div\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv 
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//--> - Fuel injection allows very precise metering of fuel to each 
cylinder. This improves performance and fuel economy. Group [EMAIL PROTECTED] 
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