March 9, 2007

The performance of John's 5.0 Mustang is mind-numbing on the street, yet the actual numbers have yet to be quantified on a dragstrip. It's a lightweight coupe at around 3,100 pounds with more than 700 hp at the tires. Once the fuel system and tune have been corrected, we're confident it won't have a problem joining the nine-second club sometime soon.

If you doubt that estimate, maybe you should head over to John's shop and check out the car in person. He had this to say about how his Mustang fits into his business plan: "More than 98 percent of my business is installing blowers on stock, street-driven cars. My customers always want to know how much horsepower they make and how fast they'll go. And, the best way to show them what X amount of horsepower feels like is to take them for a ride in my car. Along with the blower kit, they get a ride in the car. I tell them their car isn't going to run like this, but it does give them an idea of what they're in for. You know, when I get on this car, it's just wild. For most guys, it scares the heck out of them."

So-you get a blower install and a ride in this nasty notchback? Where do I sign up, Mr. Stamper?

Horse Sense: The 8-psi Vortech supercharger kit and the Vortech aftercooler sell for around $2,400 and $1,400 respectively. Put that on top of a solid motor with good heads, then add the appropriate fuel system, and you'll be well on your way to making more than 700 hp at the wheels.

The stance of John's street stormer is classic old-school 5.0. Koni adjustable struts and shocks work with Moroso Trick front and rear springs to help plant the Mustang at launch. The front sway bar has been pulled, and Southside lower control arms and double-adjustable Metco uppers work with a Performance Automotive antiroll bar in the back. John installed custom subframe connectors and the 10-point chrome-moly 'cage. The 2.5-inch Cervini's fiberglass cowl hood is the only external mod other than the Weld rims and M/T skinnies and slicks.

When last dyno tested, John's homebuilt motor (circa 1998) laid down 614 rwhp at only 5,000 rpm before the whole deal went lean. Since then, the fuel system was upgraded, and John will be taking his car to Paul's Automotive Engineering in Cincinnati for a fresh reflash of the stock computer. The 306 magic-maker is based on a stock block, Eagle H-beam rods, an Eagle crank, and 8.5:1 Probe pistons. Looking for a street-friendly, fun engine combination, John chose to stay with the F303 camshaft from FRPP. The heads are Trick Flow Twisted Wedge castings that wear 2.02/1.60 valves and were ported by Indy Cylinder Head. An Extrude Honed Vortech/Saleen intake manifold takes more than 26 psi of boost from the Vortech T-Trim.