Roush SF347IRC 347 CI SF Individual Runner Crate Engine

Description

High tensile gray iron anchors the Roush SF347IRC Crate Engine, delivering 450HP at 6,000 RPM for commercial long block repower projects demanding classic small block Ford packaging. This 347 cid stroker V8 produces 420 ft-lbs torque through eight individual throttle runners. Installers must route twin fuel delivery lines to balance pressure across both injector rails.

Solid ASTM A48 Class 30 gray iron forms the 4-bolt main engine casting. A forged 4340 chromoly steel crankshaft pairs with heavy beam connecting rods inside this Roush engine core. The 12V starter pulls 165A under standard cold crank testing. Dry weight measures 465 lbs inside dimensions of 27in length by 26in width by 28in height. Sump capacity holds 7.0 quarts.

Key Features of Roush SF347IRC

Fleet operators buy Roush SF347IRC Crate Engine packages to accelerate heavy industrial engine rebuild operations. The eight stack electronic induction system provides instant throttle response with modern fuel metering accuracy.

• CNC ported aluminum cylinder heads optimize intake air velocity for superior horsepower output.
• A custom ground hydraulic roller camshaft provides stable valve actuation without periodic lash maintenance.
• Eight individual throttle bodies supply direct air charges to each combustion chamber.
• Forged aluminum pistons endure high cylinder pressures without developing ring groove fatigue.
• The SF347IRC commercial core maintains 0.0017in connecting rod bearing clearance for dependable oil films.
• A high volume oil pump circulates lubricant through internal galleys to prevent journal wear.
• Multi layer steel head gaskets clamp compression tight across the entire deck surface.

Dynamometer Load Bench Test Limits

Dynamometer testing confirms 450HP at 6,000 RPM plus 420 ft-lbs torque at 4,200 RPM for this SF347IRC long block engine. Shop instrumentation documents 52 PSI oil gallery pressure at 2,000 RPM at 190°F operating temperature. Cylinder compression gauges verify 185 PSI across all eight cylinders within 3% variance balance. Crankshaft center journal runout shows 0.0003in TIR. Exhaust gas temperature gauges indicate 1,260°F during extended dyno pulls.

Shop Installation Maintenance Protocol Requirements

Throttle crossbar linkages require 6 lbs return spring force for positive closure against vibration. Mechanics should not install this commercial replacement engine into light passenger cars lacking high output electric fuel pump plumbing or unreinforced manual transmission crossmembers.

• Drain break in oil after 500 miles or 20 operating hours then refill with 10W-40 synthetic motor oil.
• Inspect individual throttle linkage butterflies for uniform synchronization before engine startup.
• Check cylinder head fasteners at 75 ft-lbs torque following the initial thermal heat expansion cycle.

Crate Manifest Warranty Protection Coverage

The Roush build standard includes a 2-Year or 24,000-mile limited manufacturer warranty. The heavy wooden shipping crate holds the dressed engine package, eight stack induction, fuel rails, distributor, water pump, harmonic balancer, oil pan, valve covers, plus certified dynamometer test sheets.