Quote:
Originally Posted by tanay
As this is a single valve, the flow velocity of the mixture is high and it results in better filling of the cylinder with the mixture.
Now, take a 4V engine at low revs. Two intake valves will result in a greater area through which AF mix can flow. But a greater area results in lower velocity.
Now, why does the 4V result in better mileage? In the lower-to-mid revs the AF mix intake being lesser than that in a 2V, this would result in better FE.
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Is it really the velocity the reason for a low torque in initial RPM's??!! My understanding is velocity should not differ much for a 4-valve.
And how is it that the AirFuel intake is lesser in a 4-valve?
Sorry if the question is noob!