| | Baseline | Heatsoaked | Open Airbox | HS VS. OAB |
| TQ | Power | A/F | TQ | Power | A/F | TQ | Power | A/F | TQ | Power |
| 2,000 | 263 | 99 | 12.3 | 263 | 99 | 11.9 | 274 | 103 | 13.1 | 11 | 4 |
| 2,500 | 276 | 130 | 11.9 | 277 | 131 | 11.7 | 290 | 137 | 12.5 | 13 | 6 |
| 3,000 | 287 | 163 | 11.5 | 287 | 163 | 11.6 | 298 | 169 | 12.4 | 11 | 6 |
| 3,500 | 295 | 196 | 11.4 | 297 | 197 | 11.4 | 307 | 204 | 12.0 | 10 | 7 |
| 4,000 | 307 | 232 | 11.2 | 305 | 225 | 11.3 | 313 | 237 | 12.0 | 8 | 12 |
| 4,500 | 312 | 267 | 11.3 | 313 | 261 | 11.0 | 319 | 272 | 12.0 | 6 | 11 |
| 5,000 | 309 | 293 | 11.1 | 307 | 297 | 11.1 | 315 | 299 | 11.8 | 8 | 2 |
| 5,500 | 303 | 316 | 11.1 | 303 | 316 | 11.0 | 311 | 325 | 11.4 | 8 | 9 |
| 6,000 | 290 | 331 | 11.2 | 289 | 329 | 11.0 | 300 | 341 | 11.8 | 11 | 12 |
| 6,300 | 274 | 328 | 11.2 | 280 | 335 | 11.1 | 291 | 348 | 12.0 | 11 | 13 |
To find out how much the 427R...
To find out how much the 427R puts down to the wheels, we stopped over at Moore Tuned [(863) 559-4344; www.mooretuned.com] in Lakeland, Florida, to strap it down to Allen Moore's Mustang MD-1100SE single-eddy current chassis dyno. Allen specializes in tuning high-horsepower cars for maximum driveabilty, which makes him our kind of guy!
5.0 Tech Specs
2010 Roush 427R
Engine and DrivetrainBlock 4.6-liter 90-degree V-8
Displacement 281 ci
Rods Cracked, powdered metal with floating wristpins
Pistons Hypereutectic aluminum
Camshafts SOHC, variable camshaft timing
Heads Aluminum, three valves per cylinder
Intake Composite shell-welded single-runner, charge-motion-control valves
Exhaust Stock with Roush after-cat system
Transmission
Tremec 3650 five-speed
Rearend 8.8-inch w/3.55 gears
Electronics
Engine Management
PCM w/Roush tune
Ignition Coil-on-plug
Gauges Roush white-face gauges, Roush vent pod with boost gauge
Chassis And Suspension
Front Suspension
Reverse-L independent MacPherson strut, 34mm tubular stabilizer bar
Springs Roush Performance
Struts Roush Performance
Brakes 316x30mm vented disc, twin-piston 43mm floating aluminum calipers
Wheels Roush 20-inch cast-chrome wheels
Tires Dunlop 275/35ZR20
Rear Suspension
Three-link solid axle with coilsprings, Panhard rod, and 20mm solid stabilizer bar
Springs Roush Performance
Shocks Roush Performance
Brakes 300x19mm vented disc, single-piston 43mm floating iron calipers
Wheels Roush 20-inch cast-chrome wheels
Tires Dunlop 275/35ZR20
2010 Roush 427RWhile the Rouscharger...
2010 Roush 427RWhile the Rouscharger blower is a familiar face, Roush really outdid itself with the execution of the '10 kit. Rather than routing airflow from the driver side all the way over to the passenger side, as in the prior kits, the Firecracker Roushcharger features a driver-side inlet. This inlet is fed in a straight shot thanks to a Roush lid for the stock airbox. This arrangement keeps things on the up and up for emissions, and still makes use of Ford's new grille-fed induction.
Currently atop the '10 Roush...
Currently atop the '10 Roush food chain, the 427R package ($14,156 on top of the Mustang GT price) is distinguished from its Stage 1 and 2 brethren in part by this trunk-lid badging. The $5,952 Stage 1 package is all about looks. It includes the bodywork, badging, and 18-inch chrome wheels, while the $7,326 Stage II package adds performance zest courtesy of the Roush suspension system. Naturally, you can option up all the Roush variants with myriad appearance and performance parts. Our well-optioned 427 tester stickered at $55,538.