Aluminum XL Blocks

Hemi Products Aluminum Engine Blocks

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Hemi Products Engine Blocks offer an improved, heavy duty, versatile, highly reliable engine design for street, strip, off-road, and marine applications with the following specifications:

  • 426 to 600+ cubic inch with internal oil pickup
  • Original standard bolt patterns (Oil Pan, heads, intake, exhaust, water pump, bell housing)
  • Standard finish bore to maximum bore 4.500
  • Standard stroke to maximum stroke 4.750
  • Standard deck 10.725
  • Standard priority oil system with internal oil pickup
  • Standard cam height
  • Finished machined weight under 130 pounds
  • (including steel billet main caps, ARP studs and steel cylinder sleeves)

New design provides:

  • Improved internal structural strength and durability that equalizes stress loads and reduces block twist
  • Improved oiling system moves oil back into the oil pan much faster and prevents oil accumulating in the valve covers (Helps prevent oil starvation, keeping oil in the pan area where it can do the most good)
  • Improved water circulation and cooling to move the heat out of the engine faster and reduce heat loads
  • Pre-clearance for large stroke crank shaft up to 4.750 without external oil system no additional machining required
  • Extreme duty aluminum formula
  • Premium castings. Special heat treating and stress relief process

This design minimizes modifications or additional machine work normally required during high cubic inch performance engine assembly.

This high-performance block design incorporates many improvements over early 426 engines. This highly versatile design increases performance, oiling, cooling, and structural reliability. Because of the quick throttle response, light weight-to-horse power and high torque ratio at relatively low RPM, these engines offer service to many different applications:

  • Original equipment replacement
  • High Performance competition
  • On- or off-road
  • Marine
  • Tractor pulls
  • Air boats or propeller-driven vehicles
  • Extreme or heavy duty industrial applications

Most changes to the original engine design are internal so you can't see them when the engine is fully assembled. We have incorporated engineering and modifications from many well known engine builders who learned thier skills the hard way through trial and error testing at the tracks and on the streets in every configuration imaginable over the last 40 years.

These changes have been integrated into the block design and greatly improve the strength, performance and reliability of the engine and remove the need to modify the block during assembly.

Our High Performance Engine uses a proven aluminum formula that is filtered at high temperature and then cast, heat treated, and stress relieved to provide the maximum strength and correct density for maximum material strength and durability only seen in high quality castings.

Precision performance machining improves strength, relieves stress and provides maximum clearance, to remove the need for additional grinding, welding, or machining during assembly.

This new engine block offers exceptional water transfer through the block and around the cylinders to provide the best cooling and heat transfer possible to remove heat from the block quickly and efficiently.

Oiling is achieved with a priority oiling distribution system. Special attention to oil return design has been incorporated into the block design to resolve the age old issue of oil accumulating in the heads and depleting crankshaft and causing oil starvation in the crank area.

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Options:

Aluminum Std XL Block Deck hight 10.72

Offered in Aluminum:

 

  • Standard dry sleeve water filled blocks
  • Half filled blocks
  • Solid blocks
  • Low Deck LD Deck height 10.475
  • Tall Deck TD Deck height 11.225
  • Raised Cam RC max raise .250
  • Oversize Cam Bearings OC max 60MM
Can be machined for external oil pickup if required

 

 

Standard deck, dry sleeve, water blocks

$4,995.00

Call or email for information about other options or pricing.

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office 865-579-2767

Fax 865-579-2761

David Everhart 865-310-7513