Fox Mustang Magazine Issue 1 | Page 36

photo: Jim Smart BOOSTING SPEED DENSITY FI On speed density cars (’88 and earlier, or ’87 and earlier in California), you can’t do much without the car not wanting to run correctly. Adding 1.72:1 ratio rocker arms (1.67:1 is stock) will pick up a little power, but you must realize that if you want to really achieve horsepower gains, you must convert to Mass Air so that the ECU can make the necessary changes to the additional airflow. AFTERMARKET HEADERS / INTAKE The biggest restriction of a 5.0 is getting the air in and out of the head. A nice aftermarket intake and a decent set of headers go a long way, even on a set of stock E7 heads. CHIPPING UP FOR POWER We can make a lot of power with just a timing light and an adjustable fuel-pressure regulator. But after countless mods to your 5.0, a custom-burned chip is the only answer to getting your car running its best and tapping all of its available horsepower. SOURCE PERFORMANCE AUTOSPORT 2179 Tomlynn St. Richmond, VA 23230 (804) 358-2505 www.performanceautosport.com 36 FOXMustangMagazine.com