Roush DL427IRFSC 427 CI Individual Runner Fuel Specific Crate Engine

Description

Propel pro-touring muscle cars with the Roush DL427IRFSC Fuel Specific Crate Engine in turnkey trim. This 427-cubic-inch small block Ford foundation utilizes electronic eight-stack individual runner fuel induction to crank out 560 horsepower at 6,200 RPM. Precision air horns feed high-flow CNC combustion chambers across demanding street excursions without hesitations.

A high-strength iron four-bolt main cylinder block forms the structural core of this short block package. The rotating group pairs a 4340 forged steel 4.000-inch stroke crankshaft with forged 4340 H-beam steel connecting rods and forged 4032 aluminum pistons. Cylinder bore measures 4.125 inches under a 10.5:1 compression ratio. A front-sump seven-quart baffled oil pan controls oil control while dry weight checks in at 510 lbs.

Key Features of Roush DL427IRFSC

Speed shops buy Roush DL427IRFSC crate engine packages to modernize vintage chassis without custom intake machining delays. Precision dyno calibration optimizes fuel curves across varied elevations and ambient track temperatures.

• 4.125-inch precision honed cylinder bores support ring seal under high load
• 4.000-inch forged steel crankshaft spins with internally balanced counterweights
• 6.200-inch forged H-beam rods resist severe wrist pin deflection
• 10.5:1 forged dish pistons clear high-lift stainless intake valves
• 2.08-inch stainless intake valves maximize intake port flow volume
• 1.60-inch exhaust valves accelerate high-temperature spent combustion gas evacuation
• Eight-stack individual runner throttle bodies provide crisp throttle response profiles
• DL427IRFSC fuel calibration module manages injector pulse widths across intermediate speeds

Dynamic Induction Power Output Parameters

Operating between 2,400 and 6,500 RPM, this powertrain produces 560 brake horsepower at 6,200 RPM and 540 lb-ft torque at 4,500 RPM. A hydraulic roller camshaft profile operates with 236 degrees intake and 244 degrees exhaust duration at 0.050-inch lift, paired with 0.576-inch valve lift. The calibrated electronic control unit runs on 93-octane premium unleaded fuel, pulling 13 in-Hg manifold idle vacuum and sustaining 45 to 65 PSI hot operating oil pressure.

Chassis Fitment Engine Bay Bounds

A standard Ford small block six-bolt bellhousing pattern mates with manual top loaders, Tremec TKX gearboxes, and heavy automatic cases. The internal neutral balance rotating group matches zero-imbalance balance dampers and flywheels. Front-sump oil pan architecture clears classic Mustang frame crossmembers and steering drag links without structural modification.

Engine Pre-Lube Maintenance Directives

Pre-lube the internal oil passages using an external priming shaft tool before initial ignition to distribute high-zinc break-in petroleum fluid across all internal roller lifters. Never route this competition street power unit into marine raw salt water cooling passages, continuous turbo boost exceeding 9 PSI on stock ring gaps, or alcohol drag fuels.

• Drain break-in fluid after the initial 50 miles of run time
• Swap motor oil every 3,000 miles using high-zinc synthetic formulas
• Check valvetrain lash settings every 12 months of operational street driving

Limited Warranty Crating Manifest Documentation

A comprehensive 24-Month or 24,000-Mile factory warranty backs this long block package against material defects. Crate packaging contains the dressed engine, eight-stack throttle body system, distributor, spark plug wires, aluminum water pump, front balancer, and an engine dyno sheet.