Thursday, May 14, 2009
Basic engine tuning
Making bigger inlet and exhaust valves- bigger inlet and exhaust valves which means ports being machined to a "better" shape. so more air and fuel can go into the combustion chamber to be burned and also better escape of exhaust gasses.
Bigger pistons- bigger pistons makes the cc of the engine bigger. for example, an engine of a 1.6 litter being bored and fitted with a bigger piston to make it to a 1.8 litter engine. by making an engine with a higher engine capacity can make more horsepower.
Tuned exhaust and intake manifolds- with a tuned exhaust and intake manifold, will increase horsepower of an engine. because the engine can breath better and remove the exhaust gas better too. a well tuned intake manifold can make better air flow for each individual cylinder which allows more air and fuel to enter. this increases the volumetric efficiency of the engine. this also applies to the exhaust manifold which improves better escape of exhaust gasses.
Lightening parts- lightening your motor parts like the flywheel and crankshaft can contribute to more acceleration especially in lower gears. this is because less energy is being used to move these rotating parts. but it will not increase horsepower of the engine.
if there is more you would like to share or questions, feel free to post a comment. would like to hear it.
Wednesday, May 6, 2009
engine 4 stroke cycle
Intake stroke
The first stroke is the intake stroke. The piston
moves down the cylinder and creates a partial
vacuum in the cylinder. A mixture of air and fuel
is forced through the inlet valve into the cylinder
by atmospheric pressure, now greater than the
pressure in the cylinder. During this stroke,
the exhaust valve stays closed.Compression stroke
The second stroke is the compression stroke.
The piston moves up in the cylinder with both
valves closed. The air and fuel mixture is
compressed and the pressure rises.
Power Stroke
The third stroke is the power stroke.
Near the end of the compression stroke,
the air and fuel mixture is ignited by an
electric spark from the spark plug. The
combustion that occurs causes a rise in
temperature and enough pressure to force
the piston down again
The fourth stroke, or exhaust stroke, the
piston moves up again and forces the burned
gases out of the cylinder and into the exhaust system.