GM LS9 377" Short Block

GM LS9 377" Short Block

Click on above image to view full picture

GM LS9 377" Short Block

Be the first to review this product

$9,249.00

Creating a more stable platform for the already stout LS9 is feasible with the adoption of custom forged 4.070" Diamond pistons. GM did a fine job with the LS9 crank, so keeping it and upgrading the connecting rods to Callies pieces facilitate keeping the oil squirters and remain a reliable foundation. This more rigid reciprocating end will keep everything in check, even with a significant shot of N2O into the 10.5:1 chambers.

Financing Available

Offer subject to credit approval and can’t combined with other credit offers. Exclusions apply. Get Details

Apply now

Description

Creating a more stable platform for the already stout LS9 is feasible with the adoption of custom forged 4.070" Diamond pistons. GM did a fine job with the LS9 crank, so keeping it and upgrading the connecting rods to Callies pieces facilitate keeping the oil squirters and remain a reliable foundation. This more rigid reciprocating end will keep everything in check, even with a significant shot of N2O into the 10.5:1 chambers.

Engine Overview

Details

Displacement: 377" Bore: 4.070"
Proven Power Rating: 1200 RWHP Stroke: 3.622"
Compression Ratio: 10.5:1 w/ 64cc Chamber Rod Length 6.125"
Cylinder Head Compatibility: LS3, LSA, LS9 Oil System Type: Dry Sump

Block: GM LS9 6.2L Aluminum
Crankshaft: GM LS9 w/ LME Blueprinting Process
Connecting Rods: Callies Ultra Billet H-Beam w/ARP Ultra 7/16" Bolts
Pistons: Diamond Forged FI w/ Gas Ports (.300" material above top ring land)
Wrist Pins: Tool Steel Heavy Wall .185"
Ring Pack: NPR Stainless Top (for high heat applications) Napier Second, 3mm Oil
Bearings: Clevite H Series Main & Rods
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

Shop our trusted Brands

  • latemodel
  • callies
  • lsx
  • wiseco
  • dart

Please wait...