1990 Thunderbird Super Coupe - Birds Of Prey - Tech
SC Performance's 5 Percent Blower Pulley
The next modification was a surefire route to improved performance. Super Coupe Performance supplied one of its 5 percent overdrive blower pulleys for the stock M90 supercharger. Increasing the speed of the blower increased the boost pressure to the 3.8L motor and improved the power output right along with it. Notice that the increase in boost pressure added power throughout the rev range. View Related Article