More Power for Your Pony: Easy Bolt-on Solutions for Your S197 Mustang 3
The last piece of the horsepower puzzle was BBK's Underdrive Power Pulley kit (Part # 1563). Historically, power pulleys always do well in dyno tests because they show noticeable gains from the moment the loud pedal is buried. Power and torque gains across the entire rpm range are a trademark of power pulleys. Our test car yielded respectable peak-to-peak gains of 6 rwhp, but the largest gains came in at 5,000 rpm, which revealed 7 extra rwhp and 8 extra rwtq.
The pulleys are probably the most technically challenging item to install that we tested. They're not difficult to install by any means, but some special tools are required to accomplish this task. A harmonic balancer puller and a torque wrench are required. Air tools help, but the job can be done without them. The average do-it-yourselfer will want to allow about an hour and a half, while pros like GTR's crew can get-r-done in about 45 minutes. Factoring in the reasonable price of the pulleys (expect to pay around $250) and the solid results, BBK's pulleys should be on everyone's "to-do" list.
In a few hours, GTR had managed to bump up the power to 284 rwhp and 285 rwtq with the addition of a few basic and proven modifications. Overall peak-to-peak gains realized were 16 rwhp and 15 rwtq, but more impressive were the largest overall gains of 25 rwhp and 25 rwtq seen at 5,400 rpm! That is power that will allow our 2010 GT to stand proud among its peers on the streets.