ATK Ford 351W 300HP HP09M Stage 2 Mid-Dress Long Block Engine

Description

Distributor gear tooth shear from excessive oil pump drive resistance causes total ignition loss on classic transport chassis. The ATK Ford 351W 300HP HP09M Stage 2 Mid-Dress Long Block Engine eliminates valvetrain timing failure during commercial long block repower service. This 8-Cylinder 300HP Windsor powerplant demands steel distributor gear pairing to match the hydraulic roller camshaft core.

Heavy ASTM A48 Class 30 gray iron forms the deep 9.500in deck block with structural main webs. A balanced nodular iron crankshaft spins in tri-metal copper-lead bearings, feeding hypereutectic pistons inside cast iron heads. This ATK engine core demands a 12V 165A starter draw during cold startup cycles. Dry assembly weight is 460 lbs, occupying a 29in length, 25in width, 28in height frame holding 5.0 quarts of oil.

Key Features of ATK Ford 351W HP09M

Restoration shops buy ATK Ford 351W HP09M Mid-Dress Long Block Engine packages to avoid assembly headaches. Every industrial engine rebuild passes ultrasonic wall thickness verification to ensure cylinder sleeve integrity under load.

• Cylinder bores machine to 4.030in with precision plateau hone cross-hatching.
• Main bearing journal clearance holds at 0.0015in for steady oil film formation.
• Hydraulic roller lifters eliminate traditional flat-tappet camshaft break-in wear.
• Dual-plane aluminum intake manifolds optimize low-end torque production.
• Multi layer steel head gaskets resist combustion leaks across deck surfaces.
• This HP09M commercial core receives micro-polished crankshaft journals flat within 0.0003in.
• Stellite exhaust valve faces stop valve recession under sustained towing conditions.

Brake Dyno Load Output

Water-brake dynamometer verification certifies that this HP09M long block engine delivers 300 continuous BHP and 355 ft-lbs of torque at 3600 continuous load RPM. Internal oil gallery pressure measures 54 PSI while oil sump temp levels at 190°F under sustained brake torque. Exhaust gas temp tops at 1290°F down the test header runners. Cylinder compression reads between 175 PSI and 182 PSI across all eight cylinders. Crankshaft center journal runout measures 0.0003in TIR.

Field Installation Limitations Rules

Four-barrel carburetor throttle shafts require 5 lbs of linear pull force to guarantee complete return stop contact. This mid-dress motor is not intended for high-boost turbo applications, mud dragsters, or closed-cooling marine vessels.

• Evacuate break-in petroleum motor oil after 500 miles or 20 operating hours.
• Set hydraulic lifter preload to one half turn past zero lash on base circle.
• Torque 1/2in cylinder head fasteners in sequence to 100 ft-lbs final setting.

Verified Warranty Terms Delivery Contents

Built to the recognized ATK assembly standard, this crate engine carries a 2-Year unlimited-mile limited parts warranty. The wood shipping pallet includes the dressed long block core, oil pan, timing cover, intake manifold, water pump, valve covers, and signed dyno load sheet.