ATK Ford 502 Big Block 515 HP HP102M Stage 2 Mid-Dress LB

Description

Exhaust manifold cracks and oil consumption cripple aging big block utility haulers. The ATK Ford 502 Big Block 515 HP HP102M Stage 2 Mid-Dress LB engine revitalizes severe duty equipment through an industrial engine rebuild. This 8.2L 8-Cylinder stroker delivers 515HP, but mechanics must verify bellhousing depth to ensure full torque converter pilot engagement.

Poured from ASTM A48 Class 35 iron, this ATK engine core features aluminum high-flow heads and a 4340 forged steel stroker crank. Cold starter draw pulls 185A at 12V. Dry weight registers 560 lbs inside dimensions measuring 32in length, 29in width, 30in height. Oil capacity requires 6.0 quarts in the deep-sump pan.

Key Features of ATK HP102M

Equipment rebuilders buy ATK Ford 502 Big Block 515 HP HP102M Stage 2 Mid-Dress LB engines to resolve catastrophic power shortages in 385-series vehicle platforms. The included mid-dress components save critical bay assembly labor by establishing accessory mounting points prior to arrival.

• Generous 502ci displacement derived from a 4.390in bore and 4.140in stroker crank.
• Mid-dress hardware includes the intake manifold, water pump, and performance valve covers.
• CNC-machined aluminum cylinder heads drop front axle weight while maximizing airflow velocity.
• Hydraulic roller camshaft eliminates premature lobe wear under prolonged heavy towing conditions.
• HP102M commercial core components undergo precision dynamic balancing to eliminate harsh drivetrain harmonics.
• Severe-duty forged connecting rods resist high tensile fatigue under continuous commercial operation.
• High-strength main studs anchor the bottom end against high cylinder pressure forces.
• Multi-layer steel head gaskets seal combustion pressures under protracted highway pulling loads.

Hot Cell Verification Data

Testing on every single HP102M long block engine guarantees ready power delivery. The assembly achieves 515HP at 5200 RPM and 590 ft-lbs torque at 3800 RPM. Sump oil gallery pressure holds 60 PSI hot at 195°F operating temperature. Cylinder compression verifies 185 PSI across all cylinders with 3% variance. Crank journal runout limits to 0.0003in TIR. Steady exhaust gas temp settles at 1310°F under maximum loading.

Chassis Compatibility Service Protocols

Carburetor throttle linkage requires 7 lbs return force resistance. This 385-series based big block is NOT suited for small-block Windsor motor mounts, factory electronic fuel-injected computer harnesses, or front-wheel-drive equipment.

• Drain break-in motor oil and install a fresh oil filter after the initial 500 service miles.
• Verify cold hydraulic roller lifter preload at one-half turn down past zero clearance.
• Check water pump fasteners to 25 ft-lbs torque after the initial thermal expansion cycle.

Warranty Statement Package Contents

Assembled under the verified ATK assembly standard, this powertrain carries a 2-Year 24,000-mile commercial warranty. The reinforced shipping crate holds the dressed long block, aluminum intake manifold, water pump, valve covers, oil pan, and an official dynamometer printout.