13B Engine Porting

We offer a few different types of engine porting. Street Porting: Gas mileage is typically not affected. Stock turbo(s) and computer works just fine, although some form of fuel enrichment should be used. Advanced port timing gives awesome power through the midrange and spools turbos a lot quicker. This is the port where your idle quality deteriorates. A reasonable idle of 800-900 rpm can still be achieved, but you’ll notice some misfiring due to the extra port overlap. Vacuum signal typically between 14″ and 16” @ 900 rpm. This port can be customized to your specification. Gas mileage either stays about the same or decreases slightly, but 20+ mpg on a properly tuned setup is still attainable, depending on weight, driving habits, etc…. stock turbo(s) is inadequate and should be upgraded. You’ll see the best results with an engine management system. We can also enlarge the typical street port to provide an even more aggressive powerband. We call this type of port a "Race Port". Bridge Po