New Connect and Cruise Package
Chevrolet Performance’s SP383 EFI Turn Key-kit offers the strong pull of the proven 383 “stroker” combination and the contemporary convenience of electronic fuel injection, delivered with most of the engine accessories required to get the engine running in your project vehicle!
The SP383 EFI incorporates a port-style injection system, with the injectors plumbed in a carburetor-style intake manifold, and the throttle body mounted in the conventional position of the carburetor, which allows for a traditional air cleaner and a classic appearance. It’s rated at 450 horsepower and a stout 436 lb.-ft. of torque.
Our comprehensive Turn-Key assembly is delivered with the distributor and damper installed. The throttle body, starter, fuel pump, air conditioning pump, alternator, single-belt front-end accessory drive system and more are also included in the kit.
Engine and Trans Includes:
•SP383 EFI Turn Key Crate Engine
•GM 4L70e Transmission
•Flexplate kit
•Torque Converter
•Transmission control module
It’s hard to beat the classic 383 “stroker” for Small-Block torque, but Chevrolet Performance engineers found away. They matched it with the driving convenience of electronic fuel injection!
Rated at 450 horsepower and 436 lb.-ft. of torque, the SP383 EFI also features a high-performance roller camshaft and lightweight aluminum, Fast Burn-style cylinder heads with modern valvetrain technology that includes beehive-type valve springs and aluminum roller rocker arms. The SP383 EFI incorporates a port-style injection system, with the injectors plumbed in a carburetor-style intake manifold, and the throttle body mounted in the conventional position of the carburetor, which allows for a traditional air cleaner and a classic appearance. It’s a vintage look that offers contemporary drivability and strong performance.
Our SP383 EFI Deluxe kit includes the distributor, damper and flexplate, ready to install.
Specifications:
Power: 450 HP @ 5800 RPM, 436 ft. lbs. of torque @ 4800 RPM
Displacement: 383 CID
Bore x Stroke: 4.00” x 3.80”
Compression Ratio: 9.6:1
Recommended Fuel: 92 Octane
Block: Cast Iron, 1 piece rear seal, 4-bolt main caps
Crankshaft: 4340 Forged Steel
Connecting Rods: HD Powdered Metal Steel
Pistons: Hypereutectic Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .509” Intake / .528” exhaust
Cam Duration @ .050”: 222 deg. Intake / 230 deg. Exhaust
Lobe Separation: 112 Degree
Cylinder Heads: GM Fast Burn Aluminum Dual Bolt Pattern, 3/8” screw-in rocker studs
Combustion Chamber: 62cc
Valves: .200” Intake/ 1.55” Exhaust
Rocker Arms: Aluminum Roller, 1.5:1 Ratio
Valve Springs: 12625033
Balance: External
Maximum GM Recommended RPM: 6000
Ignition Timing: Base 10 degrees BTDC, 36 degrees total
Engine Includes:
• Fully GM assembled long block
• Black Aluminum Valve covers
• GM/Edelbrock Vortec Intake Manifold
• Oil pump, pick-up and oil pan
• 12-3/4” Auto Trans Flexplate
• 8” Harmonic Balancer
• Front timing cover
• Oil Filter and Adapter
• Passenger Side RH Oil Dipstick and Tube
Note: Water pump and plug wires are not included
Warranty:
General Motors limited 2 year / 50,000 mile parts & labor warranty. Click on Document tab above for full details.
Chevrolet Performance 4L70E Transmission
Similar in design to the 4L65E, this 4L70E electronically controlled four speed overdrive transmission is suitable for "LS" series V8 engines producing up to 495 Ft. Lbs of torque. Does Not include torque converter.
Features:
• Increased horsepower and torque capacity
• Heavy duty upgrades including 5 pinion gearsets
• Heat treated stator shaft splines
• Induction hardened turbine shaft
• Seven-plate clutch packs
• Shot peened output shaft
• Revised valve body calibration
• Gear ratios: 1st-3.06, 2nd-1.62, 3rd-1.00, 4th .070
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