Roush 427IR Fuel Injected Crate Engine Motor

In the history of Hot Rods and Muscle Cars, the number 427 brings back plenty of "Magic Memories." Back then, the "Side Oiler" was the king. Today, we have the option to build to this memorable cubic inch and still have all of the benefits of the "Windsor Engine." There are Four variations of the Roush 427 to allow the perfect fit for your project.

427IR - This engine gets 50 more horsepower and an additional 35 lb.-ft. of torque than the 402IR, but has the same combination of a "Weber Style" 8-Stack Fuel Injection System utilizing Roush Engineered calibration.

• Engine Model: 427IR 8-Stack Fuel Injection
  
• Horsepower (maximum): 560 HP (8 qt. Oil Pan)
  
• Torque (maximum): 540 Lbs./Ft. (estimated)
• Displacement: 427 Cu. In.
• Block: Dark 4-bolt main, 9.5* Deck
• Crankshaft Type: 4340 Forged Steel (internally Balanced)
  
• Bore and Stroke: 4.125" x 4.00"
• Connecting Rod Type: 4340 Forged Steel H-Beam
• Compression Ratio: 10.25:1
• Pistons: wiseco Forged w/ Plasma Moly Rings & lightweight pins
  
• Timing Chain: Double Roller
• Camshaft Info: Roush Proprietary (moderate)
  
• Lifter Type: Hydraulic Roller
• Cylinder Heads: Aluminum
• Intake Runner Volume: 205 CC, fully CNC ported
• Combustion Chamber Volume: 61 CC
• Valve Sizes: 2.08" Intake 1.60* Exhaust
• Rocker Arm Ratio/Type: 1.6:1
• Spark Plugs: Autolite 3923 (or comparable)
• Intake Manifold: "Weber Style" 8-Stack Induction System
  
• Fuel System: Electronic Fuel Injection Utilizing Roush Calibration Dual Sync. Distributor, Electric "High Volume" Fuel Pump, Wide Band 02 Sensor, Intake Temp. Sensor, Engine Coolant Sensor, Map Sensor, IAC, and Ignition Control Box.
  
• Fuel Requirements: Premium Unleaded (minimum)
• Max. Recommended RPM: 6,250
• Firing Order: 1-3-7-2-6-5-4-8
• Oil Pump: High Output - Adjustable
• Timing: 31 to 34 degrees @ 4,000 rpm (not to exceed 35)
• Oil Pan: powder coated 8-quart Front Sump - Baffled or Dual-sump (Mustang) available
• Oil Filter: Motorcraft FL1-HP (or comparable)
• Oil Weight: 10w30 - non synthetic for first 3,00 miles
• Flywheel: SFI Rated Steel, 157 tooth Ring Gear
  
• Starter: Powermaster High Torque Gear Reduction or Equivalent