Pro Class 408 RS Race Engine

Description

Pressurize high-volume oil galleries and stabilize forged rotating components under 550 brake horsepower demands across extreme commercial racing track schedules without hesitation or power fade using the Pro Class 408 RS Race Engine. Built for severe competition transport and high-performance racing platforms, this 408-cubic-inch stroker V8 engine delivers relentless high-RPM stamina under extreme thermal stresses.

High-nickel cast iron racing block architecture features thick cylinder walls with splayed four-bolt main bearing caps and an Ra 20 micro-inch deck finish. A 4340 forged steel stroker crankshaft rotates on coated competition bearings, driving forged 4340 H-beam connecting rods and custom forged aluminum dome pistons. Sump capacity measures seven quarts in a baffled competition oil pan, while high-velocity oil passages protect mechanical roller valvetrain parts across a dry engine mass of 490 lbs.

Key Features of Pro Class 408 RS

Motorsport fleet directors buy Pro Class 408 RS race engine packages to eliminate mechanical fatigue and guarantee maximum power consistency during endurance competitions. Automated dyno cell verification confirms exact valve seat sealing and balanced cylinder compressions under full-throttle demands.

• CNC-ported aluminum cylinder heads maximize airflow CFM through high-velocity intake runners
• Solid roller camshaft profile delivers aggressive valve lift for maximum mid-range and top-end power
• Multi-layer steel cylinder head gaskets maintain combustion seals against extreme cylinder pressures
• Diamond plateau honed cylinder bores eliminate ring flutter and stabilize crankcase oil control
• High-volume blueprinted oil pump provides 65 PSI continuous pressure to crankshaft and valvetrain
• Splayed four-bolt ductile iron main caps lock down crankshaft journals against extreme rotational loads
• Pro Class 408 RS long block units undergo full magnetic particle flaw testing

Competition Power Thermal Limits

Dynamometer calibration validates 550 horsepower at 6500 RPM alongside 525 lb-ft continuous torque at 4800 RPM using a 10.8:1 compression ratio. Dynamic cylinder cranking compression tests between 190 and 205 PSI across all eight cylinders. Operating coolant temperatures hold between 175°F and 195°F, with oil pressure measuring 25 PSI at hot idle and 65 PSI under full acceleration. Radiator thermal heat dissipation capacity totals 5200 BTU per minute under Competition Track duty cycle standards.

Driveline Crankshaft Interface Parameters

The rear crankshaft flange uses an internal balance configuration with an eight-bolt flywheel pattern. Crankshaft pilot bore measures 1.375 inches, while the front snout measures 1.375 inches with a precision quarter-inch keyway for harmonic damper location. Dial indicators measure crankshaft axial thrust endplay within 0.004 to 0.007 inches across all finished builds.

Pre-Lube Guidelines Servicing Limits

Technicians must prime internal engine oil passages with an external pressure tank and rotate the engine by hand before initial ignition. Conduct a twenty-minute valve spring break-in procedure using high-zinc synthetic competition lubricant. This race engine is not engineered for street pump gasoline below 93 octane, unmetered nitrous systems, or sustained operating speeds exceeding 7000 RPM.

• Check oil levels and valve spring lash each shift
• Change competition motor oil and replace filter every 500 race miles
• Inspect valvetrain components and timing chain tension every twelve months

Commercial Guarantee Container Contents

Protected by our 1-Year Commercial Competition Warranty for verified racing applications. The heavy wooden container holds the remanufactured long block engine, blueprinted high-volume oil pump, complete install gasket kit, spark plug set, and a certified dynamometer qualification dyno sheet.