Roush DL427SRFSC 427 CI Street Race Fuel Specific Crate Engine

Description

Demand authentic high-output small-block torque? Select the Roush DL427SRFSC Street Race Crate Engine for competition builds. Displacing 427 cubic inches from a Windsor foundation, this small block Ford platform generates 515 horsepower at 5,800 RPM. A front-sump oil pan fits classic passenger car crossmembers, supporting high-performance street and road-course applications.

High-strength cast iron constitutes the four-bolt main block casting, featuring 4.125-inch bores and a 4.000-inch stroke. A dynamically balanced 4340 forged steel crankshaft turns inside forged H-beam connecting rods matched with 10.2:1 forged aluminum pistons. The front-sump seven-quart baffled oil pan maintains continuous oil pickup under acceleration. Dry weight registers at 504 lbs.

Key Features of Roush DL427SRFSC

Engine builders buy Roush DL427SRFSC crate engine inventory to install proven large-displacement pushrod power into classic Mustang chassis. High-velocity intake ports deliver balanced cylinder filling across low and high RPM ranges.

• Front-sump baffled oil pan fits vintage chassis without steering linkage interference
• 4.125-inch iron cylinder bores support high cylinder pressures without block bore distortion
• 4.000-inch stroke forged 4340 steel crankshaft resists flexing under hard launches
• Forged H-beam steel connecting rods resist bending under heavy inertia loads
• 10.2:1 compression pistons allow safe performance on premium pump gas mixtures
• Aluminum cylinder heads feature high-flow ports and hardened steel valve seats
• Roller rocker arms transfer camshaft lobe motion with minimal frictional losses
• DL427SRFSC fuel distribution meters atomized charge uniformly across all cylinders

Carbureted Combustion Dyno Output Metrics

Spanning an operational band from 2,000 to 6,200 RPM, the pushrod V8 develops 515 brake horsepower at 5,800 RPM and 530 lb-ft torque at 4,200 RPM. Camshaft duration measures 228 degrees intake and 236 degrees exhaust at 0.050-inch lift, alongside 0.550-inch valve lift. Designed for 93-octane pump gasoline, the engine generates 15 in-Hg idle vacuum while keeping 45 to 65 PSI hot oil pressure.

Chassis Installation Front Sump Clearance

The standard Ford small-block 6-bolt bellhousing flange supports Tremec TKX, Toploader, and C4 or C6 automatic transmissions. Internal neutral balance requires zero-balance flywheels and harmonic balancers. The front-sump oil pan specifically clears 1964-1970 Ford Mustang engine bay crossmembers and steering drag link bars.

Lubrication Pre-Charge Duty Cycle Boundaries

Manually circulate break-in oil through the block galleries using an external pump tool prior to the initial starter crank. This engine is not engineered for marine seawater cooling, continuous boost beyond 8 PSI on factory ring clearances, or E85 fuel blends.

• Drain break-in motor oil after the first 50 operational miles
• Change engine oil and oil filter every 3,000 miles using high-zinc oil
• Inspect ignition timing and distributor advance curves every 12 months

Factory Warranty Terms Engine Crate Manifest

Roush warrants this performance power plant with a 24-Month or 24,000-Mile factory limited warranty. The heavy wooden shipping crate includes the assembled long block, front-sump oil pan, aluminum water pump, electronic distributor, spark plug leads, balancer, and a certified dyno printout.