BluePrint Engines 427CI ProSeries Stroker Crate Engine | GM LS Style | Base Dressed Longblock with Carburetor | Aluminum Heads | Roller Cam
Part #: PSLS4270CTC
Description


- HP & Torque: 625 HP / 550 FT LBS
Compression Ratio: 11:1
Aluminum Heads
Hydraulic Roller Cam
Forged Crank
Forged Pistons
Block:
- OEM Block Machined in the USA!
6-Bolt Main
4.060" Bored to 4.069
1-Piece Rear Main Seal
Rotating Assembly:
- New Forged Crankshaft
4.125" stroke
Forged 6.125" connecting Rods
Forged Pistons
Internal
Cylinder Heads:
- BluePrint Aluminum Cylinder Heads -PS8015
72cc chamber
2.165" intake/1.600" exhaust valves
259cc intake/102cc exhaust runners
Cam Specs:
- Roller
.624 intake .624 exhaust lift
247 intake 263 exhaust duration
@ .050, 114 degree lobe sep.
Ignition Timing:
- Ignition box required
Also Includes:
- Carburetor - 850cfm with mechanical secondaries, dual accelerator pumps and mechanical choke
Single plane aluminum intake
Harmonic balancer
Valve covers, retro fit oil pan and timing cover
Coil Packs and coil pack harness
Crank, cam and MAP sensors
Spark plug wires & wiring harness
Dyno tested & shipped with results
Warranty:
- 30 month / 50,000 mile
Notes:
- This engine requires a non-weighted flexplate/flywheel.
Recommended Fuel: 91 Octane
BluePrint Engines recommends a 2200+ RPM stall converter.
Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars - Does NOT include ignition box. BluePrint Engines recommends MSD 6014 Ignition system on LS1HO setting
Part #: PSLS4270CTC
Description


- HP & Torque: 625 HP / 550 FT LBS
Compression Ratio: 11:1
Aluminum Heads
Hydraulic Roller Cam
Forged Crank
Forged Pistons
Block:
- OEM Block Machined in the USA!
6-Bolt Main
4.060" Bored to 4.069
1-Piece Rear Main Seal
Rotating Assembly:
- New Forged Crankshaft
4.125" stroke
Forged 6.125" connecting Rods
Forged Pistons
Internal
Cylinder Heads:
- BluePrint Aluminum Cylinder Heads -PS8015
72cc chamber
2.165" intake/1.600" exhaust valves
259cc intake/102cc exhaust runners
Cam Specs:
- Roller
.624 intake .624 exhaust lift
247 intake 263 exhaust duration
@ .050, 114 degree lobe sep.
Ignition Timing:
- Ignition box required
Also Includes:
- Carburetor - 850cfm with mechanical secondaries, dual accelerator pumps and mechanical choke
Single plane aluminum intake
Harmonic balancer
Valve covers, retro fit oil pan and timing cover
Coil Packs and coil pack harness
Crank, cam and MAP sensors
Spark plug wires & wiring harness
Dyno tested & shipped with results
Warranty:
- 30 month / 50,000 mile
Notes:
- This engine requires a non-weighted flexplate/flywheel.
Recommended Fuel: 91 Octane
BluePrint Engines recommends a 2200+ RPM stall converter.
Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars - Does NOT include ignition box. BluePrint Engines recommends MSD 6014 Ignition system on LS1HO setting
Your BluePrint engine was dyno tested with the parts and specifications listed below. If you prefer to install a different part, your engine may not produce the horsepower recorded on your dyno sheet.
Part Number: PSLS4270CTC
Fuel Delivery Type: Carbureted, 850cfm
Spark Plug: AC Delco 41-985
Spark Plug Gap: .040"
Harmonic Balancer: Non-Weighted
Flexplate/Flywheel: Non-Weighted
Stall Converter: 2200+
Intake Manifold: Single plane, satin aluminum
Fuel Recommendation: 91 - 93 Octane
Timing (Initial/Total Advance): Ignition box required - BluePrint Engines recommends MSD 6014 Ignition system on LS1HO setting
Firing Order: 1,8,7,2,6,5,4,3
Notes: Recommended break in oil for your BluePrint Crate Engine: BPP710, Not for EGR Also includes sensors and coil packs. If requested, BluePrint Engines can provide a base map and timing curve.
Click here to download a copy of the Installation Guide that came with your BluePrint engine.
PSLS4270CTC Recommended Parts

LS FRONT ACCESSORY DRIVE | FULL SERPENTINE W/ ALT | PS | WP | AC | BRACKETS | BOLTS
BPPLSFDACPSBK
$1,995.95

LS FRONT ACCESSORY DRIVE | FULL SERPENTINE W/ ALT | PS | WP | BRACKETS | BOLTS
BPPLSFDPSBK
$1,895.95

LS FRONT ACCESSORY DRIVE | FULL SERPENTINE W/ ALT | AC | WP | BRACKETS | BOLTS
BPPLSFDacBK