BluePrint Engines BPLS4080C GM LS 6.7L 408ci Base Long Block

Description

A 408ci displacement baseline powers the BluePrint BPLS4080C GM LS Long Block. This 6.7L V8 iron block LS powerplant delivers 595HP for high uptime commercial long block repower projects. Master mechanics must verify crank reluctor tooth pattern before securing sensors because 58X electronic control systems will not communicate with older 24X computers.

Solid ASTM A48 Class 35 gray iron lines the deep skirt block on this BluePrint engine assembly. A forged 4340 steel 4.000in stroker crankshaft spins inside six-bolt cross-bolted main bearing caps for maximum bottom end integrity. Cranking requires 185A across 12V starter circuits. Dry mass totals 495 lbs within physical dimensions of 28in length by 26in width by 27in height holding 6.0 quarts oil capacity.

Key Features of BluePrint BPLS4080C

Performance builders buy BluePrint BPLS4080C GM LS Long Block configurations to gain immense power during an industrial engine rebuild. High flow rectangular port aluminum cylinder heads maximize air charge velocity.

• Large 408ci modern LS displacement delivers exceptional broad range horsepower density.
• Six-bolt cross-bolted main bearing caps eliminate bottom end flex under heavy acceleration.
• Austenitic stainless steel valves maintain seating face integrity past 1,450°F combustion peaks.
• Precision ground forged pistons include anti-friction skirts to minimize bore wear under load.
• The BPLS4080C base long block incorporates hydraulic roller valve lifters for high RPM endurance.
• Multi layer steel cylinder head gaskets maintain combustion seals against continuous cylinder pressures.
• Full length cooling passages provide uniform heat transfer around all eight combustion chambers.

Dyno Test Load Capabilities

Controlled dyno load cycles stress the BPLS4080C commercial core to verify durability. Dyno readouts record 595 continuous BHP and 515 ft-lbs torque output at 4,800 RPM. Main oil gallery pressure maintains 58 PSI at 195°F operating temperature. Exhaust gas sensors confirm safe 1,380°F heat thresholds. Individual cylinder compression stands at 190 PSI within 3% variance while crank runout checks out at 0.0003in TIR.

Installation Rules Maintenance Guidelines

Electronic throttle actuators move smoothly against 4.5 lbs applied resistance. Do not install this modern high-output iron block LS engine into commercial chassis lacking dedicated auxiliary engine oil cooling circuits.

• Perform fluid and spin-on filter changes at strict 4,000-mile or 140 run hours service marks.
• Inspect serpentine belt alignment and harmonic balancer runout every 30,000 miles.
• Check cylinder head bolt torque clamp loads during scheduled major fleet overhauls.

Commercial Warranty Delivery Manifest

This long block carries BluePrint engineering backing for consistent reliability across severe applications. Purchase provides a 30-Month or 50,000-mile limited replacement parts warranty. The wood pallet crate holds the assembled long block engine, oil pan, front timing casing, aluminum valve covers, oil pump pickup tube, and certified dyno sheet.