Roush SF427IRPC 427 CI EFI Ready Individual Runner Crate Engine

Description

Satisfy demanding pro-touring build standards with the Roush SF427IRPC EFI Ready Crate Engine in your restomod car. Producing 560 horsepower at 6,200 RPM from 427 cubic inches, this small block Ford platform combines an EFI-ready individual runner intake system with polished exterior components for plug-and-play aftermarket ECU integration.

Solid four-bolt main cast iron construction supports 4.125-inch bores and a 4.000-inch stroke. Internal hardware includes a 4340 forged steel crankshaft, forged 4340 H-beam rods, and forged 4032 aluminum pistons. Featuring a 10.5:1 compression ratio and a polished seven-quart road-race oil pan, dry weight is 512 lbs.

Key Features of Roush SF427IRPC

Classic restomod shops buy Roush SF427IRPC crate engine units to attain pushrod muscle with show car visual presentation and flexible EFI setup options. Polished billet brackets combine clean visual appeal with unyielding structural rigidity.

• Polished eight-stack induction system is plumbed and ready for electronic control integration
• 4.125-inch iron cylinder bores support high combustion pressures without distortion
• 4.000-inch forged stroke crankshaft endures violent clutch dumps and hard launches
• 6.200-inch forged H-beam rods feature high-strength rod bolt fasteners
• 10.5:1 forged pistons permit safe operation on 93-octane pump gasoline
• Polished cast aluminum valve covers protect dual valve springs and roller rockers
• Polished aluminum front-drive brackets secure cooling and charging equipment
• SF427IRPC EFI pre-plumbed fuel rails integrate smoothly with external fuel regulators

Combustion Curve Dyno Verification Parameters

Operating across an RPM band of 2,400 to 6,500 RPM, this pushrod engine produces 560 brake horsepower at 6,200 RPM and 540 lb-ft torque at 4,500 RPM. A hydraulic roller camshaft features 236 degrees intake and 244 degrees exhaust duration at 0.050-inch lift, alongside 0.576-inch valve lift. Utilizing 93-octane fuel, it pulls 13 in-Hg manifold vacuum while keeping 45 to 65 PSI oil pressure.

Transmission Mating Frame Rail Spacing

The standard Ford small-block 6-bolt bellhousing pattern fits Tremec TKX, Magnum, and heavy-duty Ford automatic transmissions. Internal zero-balance engineering requires neutral balance flywheels. The oil pan fits around dropped steering linkages and tubular front crossmembers in classic pro-touring chassis.

Pre-Lube Setup Prohibited Use Cases

Pressurize the internal lubrication circuit using a mechanical oil primer shaft and high-zinc petroleum fluid prior to initial startup. This engine is not built for marine wet exhaust environments, forced induction exceeding 9 PSI boost, or pure methanol fuel mixtures.

• Drain break-in petroleum fluid after the first 50 miles of run time
• Replace engine oil every 3,000 miles using specialized high-zinc formulas
• Check valvetrain lash and rocker bolt torque every 12 months

Factory Protection Terms Crate Contents

Roush provides a 24-Month or 24,000-Mile factory limited warranty covering defective internal parts. Included inside each crate is the dressed long block, polished eight-stack throttle bodies, fuel rails, polished valve covers, billet distributor, plug wires, balanced damper, and a certified dyno output sheet.