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Do you long for excellent engine performance?
Well, here’s a tip. The key to improving engine performance is the
intake system. Because an internal combustion engine requires more or
less 14.7 parts of air for each portion of the gasoline in the
combustion chamber, getting enough clean and quality air to the engine
is really crucial. One of the things that can provide your heavy
breathing engine all the quality air it needs is the intake manifold.
Your Mazda intake manifolds perform a very basic job – to take the air
as it enters the engine and direct it through intake passages into the
runner ports mounted in the cylinder heads. Air that enters the
cylinders is mixed with fuel, and power is produced from the combustion
process. If the plenum is not large enough or the runners are too
small, the resulting lower air velocity or lack of air volume which
goes into the combustion chamber can bang the performance output of the
engine. Engine breathing is improved if the intake manifold is
configured to optimize the pressure pulses in the intake system.
Mazda intake manifolds can be divided into two kinds: single-plane and
dual-plane. Each type of Mazda intake manifold has its advantages
depending on the application and the engine’s state of tune. For
full-on high-performance use, most car enthusiasts choose a
single-plane manifold. The advantage to a single-plane arrangement is
that the manifold can be controlled to supply an almost straight shot
to the combustion chamber, which is best at high rpms.
On a dual-plane intake manifold which is a better
choice for street use, the plenum chamber is divided in half of the way
up to the base plate of the carb. The benefit of this arrangement is
that chamber volume is cut in half with respect to any given cylinder,
which helps keep mixture velocity up, resulting in crisp throttle
response and reducing the danger of pooling.
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