BluePrint PSLS4270CTC Pro LS 427 625 HP Carb Retrofit LB

Description

Master mechanics deploy the trusted BluePrint PSLS4270CTC Long Block Engine for severe commercial long block repower projects requiring modern LS displacement with carburetor simplicity. This 427 cid 7.0L engine produces 625HP at 6,200 RPM. Technicians must check hood clearance because the included single plane carburetor intake manifold sits taller than stock EFI manifolds.

Engineers cast the block from premium aluminum alloy with pressed iron cylinder liners. A forged 4340 chromoly steel crankshaft pairs with forged H-beam rods inside this BluePrint Engines engine core. The 12V starter motor draws 175A during crank cycles. Dry weight totals 445 lbs across compact dimensions measuring 26in length by 24in width by 25in height. Oil capacity holds 6.0 quarts.

Key Features of BluePrint PSLS4270CTC

Shop owners buy BluePrint PSLS4270CTC Long Block Engine assemblies to conquer demanding industrial engine rebuild programs. The package includes an ignition control box to run standard carburetors without factory computer harnesses.

• Six bolt aluminum cylinder heads feature CNC matched intake runners for superior combustion chamber filling.
• A mechanical roller camshaft delivers rapid valve lift rates to maximize top end cylinder breathing.
• Forged 2618 alloy pistons withstand high combustion pressure cycles without crown deformation.
• Cross bolted 6-bolt main bearing caps eliminate crank bore walk under extreme engine RPM loads.
• The PSLS4270CTC commercial core holds rod bearing oil clearances within 0.0018in tolerances.
• Roller trunnion rocker arms eliminate needle bearing failure under high valve spring loads.
• Multi layer steel head gaskets seal high cylinder combustion pressure across the deck face.

Dynamometer Load Bench Test Limits

Dynamometer pulls certify 625HP at 6,200 RPM alongside 565 ft-lbs torque at 4,800 RPM for this PSLS4270CTC long block engine. Pressure transducers verify 55 PSI oil gallery pressure at 2,500 RPM under steady 195°F coolant operating conditions. Compression testing reveals 195 PSI per cylinder with under 3% variance between banks. Crankshaft runout checks verify 0.0002in TIR. Exhaust pyrometers measure 1,290°F during full load test runs.

Shop Installation Maintenance Protocol Requirements

Manual throttle cable linkages require 5 lbs return spring pull force to ensure dependable throttle closure. Installers should not choose this heavy duty replacement engine for stock chassis retaining original low pressure fuel lines or weak automatic transmissions.

• Discard break in oil after 500 miles or 20 hours then fill with 10W-40 synthetic motor oil.
• Inspect coil pack harness connections and ground studs prior to initial engine start up.
• Torque cylinder head bolts in proper stages up to 75 ft-lbs following initial run cycles.

Crate Manifest Warranty Protection Coverage

The BluePrint Engines build standard provides a 3-Year or 50,000-mile limited manufacturer warranty. The secure wooden shipping crate contains the long block core, carburetor intake manifold, ignition control module, harmonic balancer, oil pan, valve covers, plus plant signed dynamometer verification sheets.