Jason then opened the doors to the Coupri and made his way into the cabin of the car, where he made some modifications as well. The black Mustang interior remained when he was done, but a set of Kirkey race seats replaced the factory buckets. Keeping Jason and Peyton in check during any full-throttle jaunts is a pair of G-Force five-point harnesses, while a 10-point rollcage and a window net allow the car to pass tech. A Grant steering wheel was added for ease of steering input, and a host of Auto Meter gauges clue him in to the engine's vitals.
Knowing that quick elapsed times were in the works, Jason beefed up the interior with a 10
While Jason was transforming his Mustang into a Coupri, he enlisted a horsepower guru in the Outlaw 10.5 ranks to create a wild powerplant that is truly fitting for the Coupri's demeanor. Steve Petty of Proline Race Engines built the pushrod powerplant, and he certainly didn't disappoint. A Ford Racing Performance Parts Sportsman cylinder case was procured and promptly bored for the soon-to-come 347-stroker bottom-end package. Once the machine work on the block was complete, Petty laid a forged-steel crank in the main web before stuffing a forged piston/rod combo down each cylinder. A Melling oil pump squirts the lubricant throughout the engine, while a Moroso oil pan seals the bottom end.
A custom turbo grind cam was slipped into the short-block, and a pair of Edelbrock Victor Jr. aluminum heads were carefully laid down, while the Victor Jr.'s combustion chamber sealed up the cylinders to the tune of an 8.5:1 compression ratio. The valves are tickled open with a set of Pro Magnum 1.6 ratio roller rockers courtesy of Comp Cams. With such a low compression ratio and the obvious mention of a turbo grind cam, it comes as no surprise that a hairdryer would make its way into the engine compartment.
Jason equipped the Coupri with some massive meats. A pair of 18x8.5 BBK RK rims enveloped
A Turbonetics T-76 turbo has its impeller spun thanks to the exhaust that is pumped into the hot side of the turbo via custom headers. The turbo creates 30 psi of boost that is promptly stuffed into the stroker mill through an Accufab 90mm throttle body and an Edelbrock Victor Jr. intake manifold. The exhaust gasses are shuffled out quietly thanks to a pair of Borla XR-1 mufflers that exit through a single downpipe that splits off into a dual-outlet, 3-inch aluminum exhaust system. For fuel, an Aeromotive fuel pump sends the go-juice through an Aeromotive regulator that keeps fuel pressure to 38 psi and into the combustion chamber via a set of 72-pound injectors. With so much cylinder pressure present, an upgraded ignition system is a must. The stock ECM was deep-sixed for a BigStuff3 fuel injection system that sends the spark signal through an MSD Digital 7 ignition box, MSD HVC coil, factory distributor, Taylor plug wires, and Accel plugs. Chilling the incoming air charge is a Precision Turbo intercooler. All told, the powerplant is good for 649 rwhp and 700 lb-ft of torque on pump gas.
Backing the turbocharged engine is a Tremec TKO 600 stick shift. Sandwiched in the bellhousing are a Spec flywheel, pressure plate, and Stage 3+ clutch. Jason makes each gear change with a Tremec shifter, and the power is transferred down the line to the 8.8-inch rear via an aluminum driveshaft. Speaking of the rear, said housing is ready to go with the addition of a set of 3.31 gears, a spool, and 33-spline Moser axles.