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

Description

Crush quarter-mile sprint times using the ATK HP102M Ford Crate Engine 502 Big Block Mid-Dress package. Engineered for classic Ford passenger cars, street rods, and heavy-duty pickups, this 8.2-liter V8 produces 515 brake horsepower at 5,400 RPM. Outfitted with an intake manifold, electronic distributor, water pump, harmonic balancer, and flexplate, this mid-dress long block accelerates restomod powertrain completion.

Technicians select seasoned Ford 460 cast iron blocks, precision align-honing main journals and squaring the block decks flat. A nodular iron stroker crankshaft spins with internal neutral balance weighting inside a two-piece rear main seal. Forged steel connecting rods attach to 4.390-inch hypereutectic pistons across a 4.140-inch stroke. A 9.5:1 compression ratio pairs with high-flow aluminum cylinder heads. Oil capacity holds 6.0 quarts. Dry long block weight totals 555 lbs.

Key Features of ATK HP102M

Restoration builders buy ATK HP102M crate engine mid-dress packages to combine massive 502 cubic inch displacement with matched front accessories and intake hardware. The long block installs flush into vintage Ford engine compartments using stock motor mounts.

• 4.140-inch stroke crankshaft expands displacement to 502 cubic inches for massive pulling torque.
• High-flow aluminum cylinder heads optimize intake charge velocity while shedding front-end engine mass.
• Hydraulic flat tappet camshaft profile produces wide mid-range torque and crisp throttle response.
• Dual-plane aluminum intake manifold ensures uniform air-fuel mixture distribution across all cylinders.
• Billet electronic distributor provides stable spark timing across the entire powerband.
• Cast iron water pump circulates coolant through factory cooling systems without modification.
• Internal neutral balance harmonic balancer dampens crankshaft torsion during hard acceleration pulls.
• Balanced ATK HP102M rotating parts isolate destructive vibration under full-throttle track loads.

Dynamic 502 Big Block Dyno

Operating across an authoritative 2,000 to 5,500 RPM power band, this mid-dress 502 big block generates 515 brake horsepower and 560 lb-ft torque on 91-octane pump gasoline. The hydraulic flat tappet camshaft specifies 224 degrees intake duration at 0.050-inch lift with 0.530-inch valve lift. Manifold vacuum measures 16 in-Hg at a 750 RPM curb idle. Hot engine oil pressure runs between 45 to 65 PSI, keeping large-diameter main journals and valvetrain parts lubricated with pressurized oil during extended acceleration pulls.

Engine Bay Subframe Fitment Clearances

This Ford 385-series big block utilizes the classic 429/460 bellhousing pattern, bolting straight to C6, E4OD, and Tremec manual transmissions. The included internal neutral balance flexplate accommodates automatic torque converters. Motor mount bosses align with factory 460 chassis frame perches. The front-sump oil pan clears steering linkages and suspension crossmembers without cutting.

Break-In Protocol Flat Tappet Limits

Pre-lube engine oil passages with high-zinc mineral break-in oil using a mechanical primer before starter engagement. Run the engine between 2,000 and 2,500 RPM for 25 continuous minutes to seat flat tappet lifters. This engine package is not engineered for supercharger boost exceeding 5 PSI, continuous RPM past 5,800, or raw marine sea water cooling.

• Drain high-zinc break-in motor oil after the first 50 road miles.
• Renew high-zinc or synthetic motor oil every 3,000 miles.
• Inspect valvetrain lash, distributor timing, and spark plugs every 12 months.

Warranty Coverage Pallet Crate Manifest

A 12-Month limited warranty protects against material and manufacturing defects. The banded wooden pallet crate houses the mid-dress long block, aluminum cylinder heads, intake manifold, distributor, water pump, harmonic balancer, flexplate, oil pan, valve covers, dyno verification printout, and installation guide. Components ship sealed against oxidation.