Roush SF511RFEPC 511 CI Race FE Performance Crate Engine

Description

Need uncompromising big-block racing power? Run the Roush SF511RFEPC Race Performance Crate Engine power unit in your project. This 511-cubic-inch 8.4-liter FE small-weight engine generates 620 horsepower at 6,000 RPM and 630 lb-ft torque. Built for track cars, Cobra roadsters, and fast street machines, it delivers massive acceleration and high-RPM durability on conventional 93-octane pump gasoline.

An aluminum FE engine block featuring cross-bolted steel main caps anchors the bottom end against extreme inertial loads. The rotating group combines a 4340 forged steel 4.250-inch stroke crankshaft, forged H-beam rods, and 4.375-inch bore forged aluminum pistons producing a 10.4:1 compression ratio. A road-race baffled oil pan maintains oil feed, holding complete dry weight to 505 lbs.

Key Features of Roush SF511RFEPC

Big-displacement torque drops straight into vintage Ford chassis without requiring front suspension stiffening. Racers who buy Roush SF511RFEPC crate engine assemblies receive competition-grade internal components verified through comprehensive dynamometer run cycles before delivery.

• 4.375-inch forged aluminum pistons withstand prolonged track day heat cycles without deformation
• 4340 forged steel crankshaft resists journal flex under continuous high-RPM track shifts
• Cross-bolted steel main bearing caps secure the crank train against severe bottom-end distortion
• CNC ported aluminum heads flow high volume through stainless intake and exhaust valves
• Shaft-mounted roller rocker systems prevent stud deflection during aggressive cam lift events
• SF511RFEPC valvetrain hardware maintains precise valve timing across thousands of race miles
• Road-race multi-baffled oil reservoirs eliminate pump cavitation during high-g track braking
• High-flow water pumps eliminate thermal hot spots throughout aluminum block cooling jackets

Dyno Ratings Valvetrain Profile

This big-block engine produces 620 brake horsepower at 6,000 RPM and 630 lb-ft torque at 4,200 RPM across a wide 2,200 to 6,200 RPM range. Camshaft specifications show 0.610-inch intake lift, 0.620-inch exhaust lift, and 246/252 duration at 0.050-inch lift. Operating on 93-octane pump gas, it draws 13 in-Hg idle vacuum while maintaining 50 to 65 PSI hot oil pressure.

Transmission Interface Clearance Bounds

Featuring traditional Ford FE bellhousing bolt circles, this engine bolts straight to classic four-speeds or modern Tremec manual gearboxes using zero-balance flywheels. Mounting bosses drop onto vintage chassis pads with clearance for long-tube headers, steering boxes, and shock towers inside classic Mustang and Cobra engine bays.

Pre-Lube Guidelines Duty Limitations

Pre-charge the internal lubrication system with high-zinc mineral break-in oil using a mechanical primer shaft prior to starting. Purge air pockets from the cooling system to prevent localized heat damage. This race-performance unit is not engineered for marine water cooling, continuous industrial pumping, or forced induction boost above 6 PSI.

• Drain break-in mineral oil and change filter elements after the first 50 miles
• Renew synthetic motor oil and install fresh spin-on filters every 3,000 miles
• Inspect shaft rocker fasteners and verify valve lash every 12 months

Warranty Terms Shipping Inventory

Backed by a 24-Month / 24,000-Mile factory limited parts protection agreement from Roush. The delivered wooden shipping crate contains the assembled long block, high-rise intake, water pump, harmonic balancer, oil pan, valve covers, instruction binder, and verified dynamometer performance test sheet.