Steve Turner
Former Editor, 5.0 Mustang & Super Fords
October 1, 2009
Photos By: Stever Turner
 BaselineHeatsoakedOpen AirboxHS VS. OAB
TQPowerA/FTQPowerA/FTQPowerA/FTQPower
2,0002639912.32639911.927410313.1114
2,50027613011.927713111.729013712.5136
3,00028716311.528716311.629816912.4116
3,50029519611.429719711.430720412.0107
4,00030723211.230522511.331323712.0812
4,50031226711.331326111.031927212.0611
5,00030929311.130729711.131529911.882
5,50030331611.130331611.031132511.489
6,00029033111.228932911.0{{{300}}}34111.81112
6,30027432811.228033511.129134812.01113
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