ATK GM 415 LS3 Stroker 620 HP LS02C Stage 3 Carbureted

Description

Reluctor wheel slip and cylinder liner distortion cause unpredictable misfires in swapped fleet utility platforms. The ATK GM 415 LS3 Stroker 620 HP LS02C Stage 3 Carbureted package delivers immense modern output through a commercial long block repower. This 6.8L 8-Cylinder stroker produces 620HP, but shops must verify fuel pressure regulator baseline settings for the high-flow carburetor.

Engineers cast the block from premium A319 aluminum with siamesed cast iron cylinder sleeves, paired with an ATK engine core 4340 forged steel crank. Starter draw demands 170A at 12V. Dry weight is 415 lbs within 28in length, 26in width, 27in height dimensions holding 6.0 quarts oil.

Key Features of ATK LS02C

Performance garages buy ATK GM 415 LS3 Stroker 620 HP LS02C Stage 3 Carbureted powertrains to integrate massive LS3 power into classic chassis without complex EFI wire harnesses. The pre-curved ignition controller and matched carburetor eliminate electrical sensor calibration delays.

• Displacement expands to 415ci via a 4.070in bore and a 4.000in stroke forged crankshaft.
• Complete stage 3 dressing provides the four-barrel carburetor, intake manifold, and stand-alone ignition box.
• Rectangular-port LS3 aluminum heads flow exceptional air volumes to sustain peak horsepower.
• Forged 4340 steel H-beam connecting rods handle extreme tensile stress during high-rpm gear changes.
• LS02C commercial core six-bolt cross-bolted main caps prevent crankcase distortion under brutal loads.
• Hydraulic roller camshaft delivers aggressive lift while retaining street-friendly valvetrain manners.
• Multi-layer steel head gaskets seal high cylinder compression pressures across severe operating cycles.
• Baffled aluminum oil pan prevents oil starvation during aggressive cornering or braking maneuvers.

Dyno Certified Bench Tolerances

Rigorous test protocols measure performance on each LS02C long block engine before dispatch. Peak power attains 620HP at 6200 RPM alongside 560 ft-lbs torque at 4800 RPM. Sump oil gallery pressure registers 60 PSI hot at 200°F fluid temperature. Compression gauges show 205 PSI across all cylinders with 3% variance. Crankshaft runout checks at 0.0002in TIR. Dynamic exhaust gas temp measures 1360°F under maximum dyno torque resistance.

Integration Filters Maintenance Rules

Throttle return spring tension checks out at 6 lbs pull force. This carbureted LS stroker setup is NOT engineered for stock low-pressure tank pumps, computer-controlled direct-injection chassis, or front-wheel-drive engine bays.

• Perform full break-in oil and filter changes following the first 500 miles of service.
• Inspect standalone ignition harness connections and carburetor fuel bowl levels after initial runs.
• Verify cylinder head bolt torque down to factory stretch parameters after the initial thermal cycle.

Warranty Statement Shipping Hardware

Adhering to the verified ATK assembly standard, this modern stroker carries a 2-Year 24,000-mile limited warranty. The wooden freight crate contains the long block, carburetor, intake manifold, ignition module, oil pan, valve covers, and an official signed dyno sheet.