Bridgeport
 

hey tdisbro91
looking at a rx7 of course and i saw couple videos on youtube of guys that have bridgeported there 13b engines. sounds amazing if done right i guess. what does it mean to bridgeport, i understand that you change the way the exhaust escapes or you redirect it but how do you do it? simple grind on the housing section or what? i work on cars right now so i understand somethings but im a new guy to rotaries

This is an old link, but it at least shows the basics:
http://www.mazdarotary.net/porting.htm