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A2Speed 6.4L (392 CID) Based HEMI Forged Long Block

SKU:A2S-392FSB
Dimensions:42 x 42 x 42
Weight:360.0 lbs
Manufacturer:A2Speed
Original Price: $11,024.99
On Sale For:  $9,090.00
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  • Description
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A2Speed Forged 6.4, 392 Short Block Specs

  • Displacement: 392 CID (6.4L)
  • Bore: 4.090
  • Stroke: 3.724
  • Boosted Compression Ratio: 9.8 : 1
  • Naturally Aspirated Compression Ratio: 11 : 1
  • Warranty: 3 Year / 36,000 mile

HEMI Rotating Assembly Components, Features, & Benefits:

  • Mopar Forged Steel Crankshaft
  • Molnar Forged H Beam Bushed Connecting Rods w/ARP 2000 Rod Bolts
  • Standard and Boost Ready Options Available
  • Diamond High Performance Forged 2618 Aluminum Pistons
    • Piston Balance: 1 gram
    • 2618 Alloy for Strength and Durability
    • Duel Pin Oilers
    • Contact Reduction Grooves
    • Accumulator Grooves
    • Forged Side Reliefs
    • FEA Designed Forging
    • ISO 9000 Certified
    • X Style Forging
    • Optional Piston Coatings
  • Diamond High Performance Full Seal Piston Rings
  • Chromoly Wrist Pins w/Wire Locks
  • King Bearings ENSIM Designed Main and Rod Bearings
    • Optional Coatings for Rod and Main Bearings

Creating Your HEMI Short Block:

Core Disassembly, Assessment & Validation

  • Core Inspection
  • Core Disassembly (If Required)
  • As Received Measurements
  • Hot Tank Block
  • Clean Oil Galleys
  • Deburr Edges as Required
  • Chafer all 90 degree corners
  • Radius bottom of Cylinder Bores
  • Chase Threads (If Required)

Machine Shop

  • Verify Deck Surface
  • Verify Bore Centerlines
  • Hone Cylinders w/Honing Plate
  • Install Billet Main Caps (Optional)
  • Line Hone
  • Supply and Install Plugs at Oil Squirters
  • Clearance Block / Pistons (If Required)

Short Block Final Assembly

  • Paint Block 6.1, 6.4: HEMI Orange, 5.7: Black
  • Install Crankshaft and Main Bearings, Maintain 0.0003 – 1” Tolerance @ bearings and 0.0005" Runout
  • Cut and Fit Piston Rings
  • Install Pistons and Connecting Rods; Maintain 0.0003 – 1” tolerance @ bearings and 0.0005” tolerance @ piston to cylinder wall.
  • Install Rear Main Seal

Our HEMI Long Block Includes an A2Speed Short Block Plus

  • CNC Ported Heads
  • Replacement Oil Pump
  • Comp Cam & Manley Chromoly Pushrods
  • Cometic Head Gaskets
  • OEM Mopar Lifters & Yokes

A2Speed Thitek CNC Ported 6.4 HEMI Heads (Thitek Bear Heads Optional)

  • CNC Port Heads
  • Performance Valve Job (seats and valves shaped)
  • PSI 1511 Springs
  • Performance Valve Guide Preparation
  • Hardened Steel Retainers
  • Hardened Steel Locators
  • Viton Valve Seals
  • Capable of up to .650” Lift
 
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