• Street Port small/mild $450 (this includes porting the intake and exhaust). Gas mileage is typically not affected. Stock turbo(s) and computer works just fine, although some form of fuel enrichment should be used.• Large Street Port or Race Port $600 (this includes porting the intake and exhaust). 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.
• Bridge Port contact us.
• Throttle Body Porting is $120 and despite claims, this does not give a ton of extra horsepower. What it does do, however, is gives a greater increase in throttle response and a little more of that “instant power” when you mash the gas pedal down all at once. The engine will rev up a bit quicker and feel like it’s a lot more open through the midrange. It also aids slightly with spool-up on turbo cars.