ATK LS01C Chevy LS 408 600 HP Carbureted Complete Crate Engine

Description

Launch hard off transbrakes using the ATK LS01C Crate Engine in Stage 3 complete carbureted trim. Displacing 408 cubic inches, this small-block Chevrolet LS stroker produces 600 horsepower at 6,300 RPM and 550 lb-ft torque at 4,900 RPM. Equipped with a four-barrel carburetor, single-plane intake, and smart ignition controller, it outfits vintage muscle cars with high-displacement LS muscle.

A seasoned cast iron GM LQ4 block is bored to 4.030 inches and anchored with 6-bolt cross-bolted main caps. The rotating group pairs a 4340 forged steel 4.000-inch stroke crankshaft with 6.125-inch 4340 forged H-beam connecting rods and 11.0:1 forged pistons. An internal neutral balance configuration pairs with a deep-sump rear-drain steel oil pan keeping high-heat lubricants contained under heavy chassis acceleration.

Key Features of ATK LS01C

Bracket racers buy ATK LS01C crate engine packages to drop huge LS horsepower into race vehicles without complicated fuel injection wiring harnesses. This complete package fits vintage Camaros, Chevelles, Novas, and tube-frame drag cars.

• 850 CFM dual-feed four-barrel carburetor discharges calibrated air and fuel charges straight out of the crate package.
• Single-plane aluminum intake manifold flows balanced air charges into rectangular cylinder ports past 6,500 RPM.
• CNC-ported aluminum cylinder heads move massive airflow volumes to feed large 4.030-inch cylinder bores.
• 2.165-inch intake and 1.60-inch exhaust valves maximize cylinder fill efficiency for fierce stroker torque output.
• 0.620-inch lift hydraulic roller camshaft profiles snap valves open rapidly for instantaneous throttle response.
• 1.7:1 ratio roller rocker arms stabilize valve actuation without pushrod deflection under high valvetrain stress.
• ATK LS01C carbureted power packages include an electronic ignition controller that programs timing curves without a computer.
• Double-roller billet steel timing gear sets preserve precise camshaft degree alignment across prolonged track weekends.

Dyno Profile Valvetrain Behavior

Operating throughout a 3,000 to 6,600 RPM performance envelope, this unit yields 600 brake horsepower at 6,300 RPM with 550 lb-ft torque at 4,900 RPM. The combustion chambers require minimum 93-octane pump fuel to suppress high-heat detonation. Camshaft profiles generate 11 in-Hg manifold idle vacuum at 850 RPM to actuate factory power brake servos. Internal oil channels sustain 45 to 65 PSI warm oil pressure.

Engine Bay Bellhousing Clearance

The block retains standard Gen III and IV LS transmission bolt patterns to mate with 4L80E, TH400, and manual gearboxes. The crankshaft tail accepts standard LS zero-balance flexplates or flywheels for balanced operation. Symmetrical side motor mount locations match aftermarket swap brackets, clearing aftermarket steering gearboxes and full-length tubular exhaust headers.

Break-In Protocol Maintenance Limits

Spin the internal oil pump with an external pre-lube drive canister until mechanical gauges indicate oil arrival at all sixteen rocker arms. Fill the sump with conventional 10W-30 petroleum break-in oil enriched with zinc additives before starter engagement. This competition-grade engine is not engineered for marine wet-exhaust cooling, continuous supercharger boost past 6 PSI, or unmetered nitrous systems.

• Replace the break-in motor oil and spin on a fresh filter after the first 500 vehicle miles.
• Inspect valve spring seat pressures and check header bolt tension every 3,000 miles of operation.
• Examine the harmonic balancer outer ring position and check oil pan seal tension every 12 months.

Factory Guarantee Crate Inventory

ATK covers this LS stroker package with a 12-Month factory warranty against defects in materials and craftsmanship. The secure wooden crate holds the complete engine, carburetor, intake manifold, ignition controller, water pump, harmonic balancer, oil pan, valve covers, instruction manual, and official dynamometer verification sheet.