The first thing on the list for Vivid Racing’s Project Ford Focus ST was the intake and exhaust. Ford designed their intake system for the ST in a very direct manner. Airflow comes into the intake box from the front bumper small openings. It then travels through a MAF sensor tube to behind the engine cover and finally connects to a turbo inlet pipe directly to the turbocharger. Generally, when designing a factory replacement intake kit, you would retain the MAF sensor pipe diameter while improving airflow. For this, Vivid Racing chose to keep the diameter of the intake pipe the same but continue its modularity with the separate turbo inlet pipe, while reducing the restriction.
Utilizing a K&N cone air filter, they designed the air intake box to pull air from the factory inlet off the bumper but also via the open space that the engine has. With a heat shield and filter cover, the filter is able to provide the turbocharger with more air directly. Though some will argue the difference of “hot engine” air compared to a true cold air intake, tests show, using thermo couplers, that the IAT’s are a minimal difference from outside to inside of the plastic factory intake. With Dyno testing, the intake had very consistent torque and horsepower gains through the peak of the RPM band of 3700 to 6000. Averaging about 10hp and 10ft/lbs of torque, the intake made almost 13 wheel horsepower at 5300 rpm. The intake kit tested is the prototype, however the finished product will be available in wrinkled black powdercoat or other customer finishes. Vivid Racing (vividracing.com) will have future updates as they show off their turbo back exhaust system, lower intercooler piping, and more!