Roush 427R Cobra Engine | Roush Deck Dart

Roush 427R Engine

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ROUSH 427R DECK DART ENGINE

427R – This is our thoroughbred and has a single plane intake manifold and a “double pumper” carburetor. Maximum horsepower, maximum fun.

Technical Specs

Engine Model: 427R

Horsepower (Maximum): 550 hp (with Victor Jr. Intake & 8qt. Oil Pan)

Torque (Maximum): 535 ft. -lbs.

Displacement: 427 cu. in.

Block: 9.5” Deck, Dart 4-Bolt Main

Crankshaft Type: Forged 4340 Steel (Internally Balanced)

Bore and Stroke: 4.125” x 4.00”

Connecting Rod Type: Forged 4340 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 1.600” Exhaust

Rocker Arm Ratio: 1.6:1

Spark Plugs: Autolite 3923 (Or Comparable)

Intake Manifold: Single or Dual Plane Available

Fuel System: Holley 750 CFM Carburetor w/ Mechanical Secondaries (Electric Choke Available)

Fuel Requirements: Premium Unleaded (Minimum)

Max. Recommended RPM: 6,250

Firing Order: 1-3-7-2-6-5-4-8

Timing: 31 to 34 Degrees @ 4,000 rpm (Not to Exceed 35)

Oil Pump: High Output - Adjustable

Oil Pan: Powder Coated 8 qt. Front Sump - Baffled or Dual-Sump (Mustang) Available *Horsepower Output Can Be Reduced When Engine is Equipped with the Dual-Sump Pan

Oil Filter: Motorcraft FL1 (Or Comparable)

Oil Weight: 10w30 - Non Synthetic For First 3,000 Miles

Flywheel: Steel, 157 Tooth (Aluminum Available)

Starter: Ford Motorsports Super High Torque (1.6kw)(Or Equivalent)

Roush 427R Engine

ROUSH 427R DECK DART ENGINE

Technical Specs

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