427" LSX 1400HP Short Block

Available Qty: 0

$13,399.00

This LME 427" LSX 1400 short block is the heart of the absolute proven combination that gives you 1400+ horsepower at your disposal. Handling the top end are provisions for 6-bolt head configuration with option to upgrade to 1/2" studs, this recourse makes cylinder head gasket and head lift issues a thing of the past. LMEs custom Diamond 2K forged 4.125" pistons are designed to handle the astounding heat and cylinder pressures today's boosted street machines produce. Callies Compstar 8 Counterweight crank with a 4.000" stroke, 6.125" Ultra rods, and .250" wall heavy duty pins conclude the proven rotating construction making this the ultimate base for street car dominance.

Displacement: 427" Bore: 4.125"
Proven Power Rating: 1400+HP Stroke: 4.000"
Compression Ratio: 10.5:1 Rod Length 6.125"
Cylinder Head Compatibility: Any LS Configuration Oil System Type: Dry or Wet Sump

Block: GM LSX Bow Tie
Crankshaft: Callies Compstar 8 Counterweight w/ LME Blueprinting Process
Connecting Rods: Callies Xtreme H-Beam w/ ARP Ultra 7/16" Bolts
Pistons: LME/Diamond 2K Custom Forged FI  w/ Lateral Gas Ports (.300" material above top ring land)
Wrist Pins: Trend H-13 Tool Steel Heavy Wall .250"
Ring Pack: Total Seal AP Stainless Top (for high heat applications) Napier Second, 3mm Oil
Bearings: Clevite H-Series Rods and Mains w/ Grooved Thrust, Dura-Bond One Piece Cam Bearings
Main Studs: ARP 

 

 

 

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