Roush BD347SRC 347 SR 5.7L 410 HP Carbureted Crate Engine

Description

Need 410 small block horses? Select the Roush BD347SRC Street Race Crate Engine. Displacing 5.7 liters across 347 cubic inches, this small block Ford power plant creates 410 horsepower at 5800 RPM and 400 lb-ft torque at 4200 RPM. A dual plane intake manifold, four barrel carburetor, and Dart four bolt block deliver dependable streetable muscle with broad low end torque.

A premium cast iron Dart four bolt main block features reinforced main webs and extra deck thickness across 4.030 inch bores and a 3.400 inch stroke. Internal rotating hardware includes a 4340 forged steel crankshaft, forged 4340 H-beam connecting rods, and forged aluminum pistons yielding a 9.5:1 compression ratio. CNC ported aluminum cylinder heads set total dressed dry weight at 440 lbs.

Key Features of Roush BD347SRC

Buy Roush BD347SRC crate engine packages to drop proven 410 horsepower small block power into vintage Mustangs, Fairlanes, and Cobra kit cars. The dressed configuration includes dual plane intake manifold, four barrel carburetor, and MSD distributor to simplify installation into Ford engine bays.

• 650 CFM four barrel electric choke carburetor meters balanced air fuel distribution across the rev range.
• Dual plane aluminum intake manifold maximizes low and midrange torque while pulling hard to 6000 RPM.
• Dart cast iron four bolt main block provides extreme bottom end rigidity under high RPM track loads.
• CNC ported aluminum cylinder heads drop front axle weight while maximizing air flow speed.
• Forged 4340 steel crankshaft produces 400 lb-ft torque to launch lightweight roadsters hard off the line.
• Hydraulic roller camshaft profile creates sharp valve events without valve float at 6000 RPM.
• Roush BD347SRC valvetrain components feature full roller rocker arms to eliminate stud deflection.

Street Race 347 Dyno Output Verification

Testing on water brake engine dynamometers validates 410 brake horsepower at 5800 RPM and 400 lb-ft torque at 4200 RPM across an effective 1800 to 6000 RPM operating band. Cam duration measures 220 degrees intake and 228 degrees exhaust at 0.050 inch lift, producing 0.525 inch intake and 0.525 inch exhaust lift. The engine draws 15 in-Hg vacuum at 800 RPM on 91 octane fuel, holding 50 to 65 PSI hot oil pressure.

Vintage Ford Engine Bay Subframe Fitment

Standard small block Ford exterior dimensions drop straight into 1965 to 1973 Mustangs, Fairlanes, and Cobra replica chassis. The internal neutral balance crankshaft couples to Ford Toploader, Tremec TKX, or C4 automatic transmissions using standard bellhousings. The dual plane intake clears factory hoods, while the front sump oil pan clears forward chassis crossmembers.

Street Race Small Block Startup Safeguards

Pre prime the engine oiling channels with high zinc break in oil using an oil pump drive tool prior to startup. This street performance engine is not engineered for marine bilge setups, forced induction boost exceeding six PSI on stock ring end gaps, or uncalibrated nitrous oxide systems.

• Drain break in oil and replace the spin on lube filter after the first 500 operating miles.
• Perform regular motor oil changes every 3000 miles or six months with high zinc synthetic oil.
• Inspect carburetor float adjustments and verify ignition timing advance every 6000 street miles.

Roush 347SRC Shipped Crate Manifest

Protection includes a 2-Year / 24,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the assembled dressed engine, four barrel carburetor, dual plane intake manifold, MSD distributor, front sump oil pan, valve covers, and official factory warranty documentation.