LS7 427" N/A - Nitrous Short Block

LS7 427" N/A - Nitrous Short Block

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LS7 427" N/A - Nitrous Short Block

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$8,740.00

This 427" short block has proven time and time again as a solid foundation for your high horsepower needs. The versatility of the naturally aspirated LS7 platform will fulfill your demand from twisted axle rock crawlers to the wide open everglades in an air boat. Filled with nothing short of the highest quality tested parts, this short block is built with reliability in mind even with the worst punishment you can give it.

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Description

This 427" short block has proven time and time again as a solid foundation for your high horsepower needs. The versatility of the naturally aspirated LS7 platform will fulfill your demand from twisted axle rock crawlers to the wide open everglades in an air boat. Filled with nothing short of the highest quality tested parts, this short block is built with reliability in mind even with the worst punishment you can give it.

Engine Overview

Details

Displacement: 427" Bore: 4.125"
Proven Power Rating: 800 RWHP Stroke: 4.000"
Compression Ratio: 12:1 Rod Length 6.125"
Cylinder Head Compatibility: Any LS Configuration Oil System Type: Dry or Wet Sump

Block: GM LS7 7.0L Aluminum
Crankshaft: Callies 4340 Compstar w/ LME Blueprinting Process
Connecting Rods: Callies Compstar H-Beam w/ARP 2000 7/16" Bolts
Pistons: Wiseco Custom Forged N/A w/Gas Ports 
Wrist Pins: Wiseco Tool Steel Standard Wall
Ring Pack: NPR 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 


***CORE EXCHANGE SHIPPING: LME is happy to assist you in shipping your block and crankshaft cores to help you save money. Exchanging your block & crank cores helps reduce the overall engine build cost without sacrificing quality. We can have your existing shortblock picked up at a location convenient for you.


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

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