400" LSX 2000HP Short Block.

Available Qty: 0

$15,550.00
5-6 weeks from order date

Don't let the smaller displacement fool you, this 400" set up manifests itself as a multiple record setting base for your high performance turbo or supercharged build. By taking the stroke of the crank down to 3.750", you yield the advantage of a more rigid piece with conjunct benefits. The cranks overlap is reduced and piston speed is slowed, allowing for a more stable unit at high RPMs and substantial boost levels for long duration. Cylinder bores are taken to 4.125" bore and feature a much thicker ring land than your standard off the shelf piston, creating a more rugged and resilient part that is able to withstand high heat & high RPM in Supercharged /Turbocharged applications. 

Displacement: 400" Bore: 4.125"
Proven Power Rating: 1800+RWHP Stroke: 3.750"
Compression Ratio: 10:1 Rod Length 6.125"
Cylinder Head Compatibility: Any LS Configuration Oil System Type: Dry or Wet Sump

Block: GM LSX Bow Tie w/ 1/2" Stud Mod
Crankshaft: Callies 4340 8 Counter Weight Magnum w/ LME Blueprinting Process
Connecting Rods: Callies Enforcer Billet I-Beam w/ARP Ultra 7/16" Bolts 
Pistons: Diamond 2K Custom Forged Piston w/ Lateral Gas Ports (.300" material above top ring land)
Wrist Pins: Trend H-13 Steel Heavy Wall .225"
Ring Pack: Total Seal AP Stainless Top (for high heat applications) Napier Second, 3mm Oil
Bearings: Clevite H Series Main & Rods, Dura-Bond One Piece Cam Bearings
Main Studs: ARP LSX

 

 

LME Standard Shortblock Blueprinting Process:

  • Block is fully deburred & inspected for flaws

  • Cylinders diamond honed with torque plates for optimal clearance per application

  • Crankshaft journals indexed & trued to exact tolerance

  • Optimal cylinder geometry achieved with diamond hone and surface finish verified with profilometer

  • Chamfered oil holes for improved oiling to bearings

  • Cylinders machined for rod clearance per application

  • Crankshaft journals polished to 2 Ra or better surface finish

  • Block and components meticulously deburred & cleaned after machining process

  • Crankshaft balanced within ¼ oz-in tolerance

  • All five main bearings & all eight rod bearing clearances measured and adjusted for application

  • Connecting rod housing bores checked & adjusted for optimal roundness & size

  • Ring are precision file fit per application

  • Piston pin bores measured & adjusted for application

  • Cam bearings installed and test cam fitted to ensure smooth rotation

  • Block aline honed and set to low of spec for maximun bearing crush

  • All oil galley plugs and dowel pins installed

  • Deck surfaces machined perpendicular to mains & deck height set for optimal quench

  • Meticulous final assembly of shortblock

  • Cylinders bored (when applicable) on 4 axis CNC perpendicular to mains giving you a true 90o  V8

  • All tolerances, clearances, machining specs, and part numbers are recorded and documented in build sheet