porting and polishing benefits?

[elmir50]

This can get to be a touchy subject cause people don't take into account the whole car as a combination, they only look at one piece at a time. Questions you need to ask yourself, is the car a street car or all out drag car? What tranny are you using? Gear ratio? Tire size? If auto what stall speed? What are your goals, good gas mileage or max power, good driveability?

What cam and valvetrain are you running, will they be sufficient in supporting a port job? Hows the car drive now?

Anyways, the main purpose of porting is to get the desired air speed through the ports to make the desired torque you are after. The second objective is to straighten out the path to the valve as much as possible (ie. cutting down valve guides) Polishing the chamber promotes bettter gas scavenging and also helps prevent detonation.