CM CH.4 Intake & Exhaust Systems
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Opening the throttle valve to a carburetor or fuel injection systems causes:
Air to move from the higher pressure area outside the engine to the lower pressure area of the manifold
Unequal distribution of the air-fuel mixture may occur b/c of:
- -Misdirected mixture flow
- -Sharp turns in the manifold
- -Distance to travel to the cylinders
Increases air velocity through a carburetor
Long, small diameter intake manifold runners:
produce the best power at low to medium rpm.
The plenum chamber:
Stabilizes the incoming air charge.
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