1990 Thunderbird Super Coupe - Birds Of Prey - Tech
T-Bird Super Coupe: Stock vs. K&N Filter
Not having proper data logging during this testing, we suspect that a portion of the impressive power gains illustrated by this simple filer change can be attributed to a slight change in running tempera-ture. We made every attempt to maintain a constant start temperature, but the factory gauges are not exactly what you would call precise. Obviously the factory flat-panel filter (or at least our high-mileage unit) was restrictive to the motor. We showed some impressive power gains with the filter change. This gave us hope that we may reach our goal of 300 rwhp with this supercharged 3.8L. View Related Article