Horse Sense: If you're wondering how Justin Starkey pumped up his '12 Boss past 800 rwhp, the short answer is with one of his supercharger kits. The long answer appears on page 112 of our June 2013 issue ("Boost 302").
We live in a wonderous time, when streetable horsepower is readily available in bolt-on packages. Thanks to the advances in modern tuning, these parts can deliver huge power and still retain the kind of driveability that keeps them enjoyable to drive. It really is cool.
Justin Starkey of VMP Tuning likes to put his Boss through its paces on road courses and d
Of course, this is even more true with the likes of Bosses and GT500s—the factory power is impressive and the modded power is insane. In the case of Justin Starkey of VMP Tuning, he's able to bolt on the parts and tune the cars. He has a stable of insanely powerful cars, one of which is a Boss 302 featuring one of his VMP superchargers. We covered it here, and it made 842 horsepower—at the wheels!
That's a huge number, and the torque wasn't far behind at 732.49 lb-ft. With that much power and grunt on tap, it's not a huge surprise that the stock clutch might not be up to the task. In the case of Justin's Boss, it wasn't an out-and-out clutch failure, but some odd behavior on the Dynojet that suggested it was on its way out the door. "The stock clutch was staying on the floor, and I was afraid it was beginning to slip on the dyno," Justin said.
Knowing that he likes to put his Boss through its paces on the road course, Justin needed to select a clutch that could corral that kind of power but still retain a driveable level of pedal effort. With that goal in mind, Justin selected McLeod Racing's RXT twin-disc clutch, which is designed to lasso up to 1,000 horsepower with light pedal effort.
"I went with the Mcleod RXT because they have a great reputation," Justin explained. "The dual-disc design drove well, but still had the holding power I needed with the blower."
Of course, like any project, there's a list of other while-you-are-at-it upgrades that you could do alongside the must-do mod. In this case, Justin decided to upgrade the clutch-fluid line with Ford Racing's high-performance replacement, and the shifter with MGW's short-throw beauty.
Check out the captions as we hit the highlights of Justin's drivetrain fortifications. He was back to the track shortly after completing these, so you know he was confident they were up to the task.
"The car performed very well at the track with the MGW shifter and Mcleod clutch," Justin added. "It shifted gears well, and I was able to make 2-3 and 4-5 shifts much more easily."