ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.
- Core return can be any Small Block Ford 351W engine
This 351W is built for daily drivers that need more power and torque.
- Horsepower: 300 hp
- Torque: 377 lb/ft
- Seasoned OE roller block
- Bore/Stroke: 4.060 in. x 3.500 in.
- Displacement: 351ci
- Crankshaft: OE Cast 1 piece seal
- Balance: 28oz external balance
- Rods: OE steel rod 5.955 in. stock bolts
- Compression Ratio: 9.1:1
- Pistons: Hypereutectic
- Rings: Moly
- Camshaft: Hydraulic roller
- Cam Duration @ .050": Intake 219 / Exhaust 219
- Cam Lift: Intake .498 in. / Exhaust .498 in.
- Lobe Separation Angle: 112lsa
- Timing Chain: Double roller
Cylinder Head Information:
- Cylinder Heads: OE E7TE cast iron
- Combustion Chamber: 62cc
- Valve Size: 1.77 in. Intake / 1.46 in. Exhaust
- Rocker Arms: Stamped steel 1.6 ratio
Oil Pan Information:
- Oil Pan: Rear sump truck pan
- Oil Pump: Melling Standard Volume
- Exhaust: 1-5/8" Headers
- Firing Order: 13726548
- Octane: 91+
- Oil: 10W30 (Conventional / Non Synthetic)
- Oil Filter: Wix or K&N
- Spark Plug Gap: .035"
- Stall Converter: Stock
- Timing: 34-36 Degrees (Vacuum port plugged on carburetor)
- Balancer: External 28oz
- Carburetor: Quick Fuel 680cfm vacuum secondary electric choke #793-HR-680-VS
- Distributor: Pro Billet MSD Ready to Run (Requires melonite or steel gear)
- Flexplate/Flywheel: External 28oz
- Intake Manifold: Weiand Stealth dual plane #925-8023WND
- Fuel Pump: Holley Mechanical 110gph #510-12-289-11
- Spark Plugs: Autolite #417-24
- Spark Plug Wires: 8mm
- Water Pump: Late model LH inlet
Notes: Will not work with Ford factory speed density EFI or F-Series Trucks, Broncos, or Vans
Disclaimer: The parts listed are ATK's recommendations of parts to be used to obtain the power figures listed. Power figures can vary based on parts used by the end user. Some modifications to the vehicle may be required using these and or other aftermarket parts.
Engine Break-In Procedure
Use or break-in oil or conventional (non-synthetic) 10w30 oil with zinc additive for the first 500 miles of operation. Do not drive for long periods at any single speed, always vary your speed. Do not tow a trailer or put other heavy loads on the vehicle. It is best to avoid long periods of idling during this period. Check the engine oil and coolant levels daily.
Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. Let the engine cool down completely and repeat process 2-3 more times. Do not idle the engine for any extended period at this time, this is critical to break in the camshaft.
At 500 Miles change the engine oil and filter using conventional (non-synthetic) oil with a zinc additive. Check fuel and ignition settings, adjust valves (where applicable). Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading or long periods of idling.
Change the oil and oil filter again at 1,000 miles. Continue using conventional (non-synthetic) oils and zinc additive, until about 4,000 miles. At that point, you may run a quality 10w30 synthetic oil if you choose. Use of oil with zinc or a zinc additive for the life of your engine is recommended.
Ford Windsor Daily Driver Performance
In 2007, ATK launched a High-Performance Division with one of the finest engine shops in the country. By reverse engineering all of their engines, they are able to eliminate any OEM deficiencies, making an ATK built crate engine a superior design over the original engine by incorporating better components when needed. Quality built ATK Ford 351W engines are offered in three different stages for ease of finishing an engine swap. ATK HP engines feature a 24 month/unlimited mile warranty.
Looking for a stock 351w to tell a e my 289 in 60s Mustang with Tax
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