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What is porting?

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What is porting?

(a) Drilling extra ports in the cylinder

(b) Resizing and reshaping of the intake port

(c) Resizing and reshaping for spark plug

(d) Drilling additional port for spark plug
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Right choice is (b) Resizing and reshaping of the intake port

To elaborate: Porting is the application of resizing and reshaping of intake ports so that the charge doesn’t strike the wall and ensuring the flow of charge is smooth.
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