Porting

[jeremy_283]

What exactly does porting do to an engine? Does an engine need porting when installing a hotcam?

[Chino886]

Originally posted by extremejrowe
What exactly does porting do to an engine? Does an engine need porting when installing a hotcam?

intake porting increases air flow, exhaust porting increases the rate of departure of the exhaust gases...

You don't need it but it is a good idea if you plan on doing a piston later....

[rrguy]

Porting usually refers to increasing the size of the ports or modifying them to flow more air. There usually is no benefit with stock motor or stock bore. Your cam /s will have the valves open longer allowing for more air fuel to enter & escape. Porting if not done right can casue power loss. done correctly still usually adds more top end & some low end loss. Something to keep in mind if you increase the bore. Alot of place simple clean up the ports. There is also a method of high velocity porting. This makes sense since cause too much flow is not good.