BluePrint Engines BP4002CTFD GM 400 508 HP EFI Drop-in-Ready

Description

Front-load fuel injected power output using the BluePrint BP4002CTFD GM 400 EFI Engine. This 6.6L 400ci small block Chevy stroker V8 delivers 508HP for drop-in commercial long block repower chassis conversions. Master technicians must plumb an unrestricted 3/8in fuel return line back to the fuel tank because high volume electric EFI pumps trigger erratic rail pressure spikes on deadhead lines.

Solid ASTM A48 Class 35 gray iron lines the four-bolt main small block case on this BluePrint engine assembly. A forged 4340 steel 3.750in stroker crankshaft spins inside micro-honed bearing saddles to withstand persistent commercial hauling stress. Cranking draws 180A across 12V starter circuits. Total dry weight reads 490 lbs within physical dimensions of 29in length by 26in width by 27in height holding 5.0 quarts oil capacity.

Key Features of BluePrint BP4002CTFD

Fleet operators buy BluePrint BP4002CTFD GM 400 EFI Engine packages to gain instant fueling precision during an industrial engine rebuild. BluePrint high flow aluminum cylinder heads feature CNC combustion chambers engineered for regular unleaded pump fuel.

• Massive 400ci displacement supplies immense low speed rotational force for heavy utility hauling.
• Four-bolt main bearing journals secure the lower end against high dynamic stress.
• Self tuning throttle body EFI calculates real-time fueling based on manifold air pressure.
• Hydraulic roller camshaft profiles optimize airflow duration while maintaining vacuum for power brakes.
• The BP4002CTFD drop-in engine incorporates forged pistons with low friction skirt coatings.
• Multi layer steel cylinder head gaskets maintain combustion seals against continuous cylinder pressures.
• Single plane electronic distributor supplies reliable high energy spark across all operational speeds.

Dynamic Dyno Load Tolerances

Factory dyno testing subjects the BP4002CTFD power plant to controlled continuous absorption sweeps. Dynamometer readouts record 508 continuous BHP and 473 ft-lbs torque output at 4,600 RPM. Oil gallery pressure maintains 58 PSI at 190°F operating temperature. Exhaust gas temperature stays below 1,380°F under continuous rated output runs. Cylinder compression verifies at 185 PSI per bore with under 3% variance and crank runout within 0.0003in TIR.

Shop Handling Routine Servicing

Electronic throttle linkages respond smoothly to 4.5 lbs applied cable tension across full quadrant sweep. Do not install this electronic fuel injected crate motor into older marine watercraft lacking coast guard certified fuel vapor recovery systems.

• Replace premium full synthetic motor oil and high flow filter canisters every 3,000 miles.
• Inspect hydraulic roller lifters and valve spring seat pressures every 25,000 operating miles.
• Verify cylinder head bolt torque to 70 ft-lbs following initial thermal break in cycles.

Warranty Backing Delivery Sheet

This factory crate engine carries BluePrint engineering backing for consistent reliability across your commercial fleet. Purchase provides a 30-Month or 50,000-mile limited replacement parts warranty. The wood pallet crate holds the fully dressed long block core, EFI throttle body, ECU wiring harness, ignition distributor, fuel pump, water pump, oil pan, and certified dynamometer sheet.