Chevrolet 19433045 383 Small Block 450 HP Crate Engine

Description

Eliminate carburetor cold start hesitation using the Chevrolet Performance 19433045 Crate Engine. Displacing 383 cubic inches, this multi port fuel injected stroker generates 450 horsepower at 5800 RPM and 436 lb-ft torque at 4800 RPM. Fast Burn aluminum heads, a forged steel crankshaft, and a self learning engine controller furnish high torque pro touring capability.

Solid cast iron block casting features heavy cylinder walls anchored by four bolt ductile iron main caps. The reciprocating kit contains a 4340 forged steel 3.800 inch stroke crankshaft, heavy duty forged steel rods, and hypereutectic pistons inside 4.005 inch bores. The resulting 9.72:1 compression ratio runs on 91 octane pump gas. Total dressed dry weight measures 465 lbs.

Key Features of Chevrolet Performance 19433045

Buy Chevrolet Performance 19433045 crate engine configurations to equip street and strip cars with turnkey multi port fuel injection. The package pairs high flow Fast Burn aluminum cylinder heads with a pre calibrated engine control unit for immediate drivability.

• Multi port electronic fuel injection injects atomized fuel directly above intake valve ports.
• Pre programmed self learning ECU automatically adjusts fuel curves during changing atmospheric conditions.
• Fast Burn aluminum cylinder heads feature 62cc combustion chambers for superior combustion speed.
• Stroker 3.800 inch forged crankshaft produces 436 lb-ft torque to launch heavy vehicle chassis hard.
• Aluminum roller rocker arms utilize a 1.5:1 ratio to reduce valve guide side friction.
• Steel hydraulic roller camshaft provides 0.474 inch intake and 0.510 inch exhaust valve lift.
• Chevrolet Performance 19433045 valvetrain parts feature high strength beehive valve springs.

Multi Port Stroker Dyno Output Verification

Engine dyno records confirm this small block generates 450 brake horsepower at 5800 RPM and 436 lb-ft torque at 4800 RPM across a wide 2000 to 6000 RPM operating band. Cam duration measures 208 degrees intake and 221 degrees exhaust at 0.050 inch lift. Ignition timing totals 36 degrees at 4000 RPM on 91 octane fuel, while internal galleries maintain 45 to 65 PSI hot oil pressure.

Retrofit Muscle Car Subframe Spacing

Standard small block Chevrolet dimensions drop straight into Camaro, Chevelle, and C10 crossmember perches without frame modifications. The external balance crankshaft register matches the included 12.750 inch 153-tooth flexplate for automatic transmissions. Aluminum heads clear standard aftermarket long tube headers, while the rear sump pan clears intermediate steering drag links.

Fuel Injection Pre Lube Startup Rules

Pre prime the engine oiling channels with high zinc break in oil using an oil pump drive tool prior to startup. This competition crate engine is not engineered for marine bilge setups, forced induction boost exceeding six PSI on stock ring end gaps, or unmetered nitrous oxide systems.

• Drain break in oil and replace the spin on lube filter after the first 500 operating miles.
• Perform regular motor oil changes every 3000 miles or six months with high zinc synthetic oil.
• Inspect high pressure fuel lines, electrical connections, and oxygen sensor fittings every 6000 street miles.

SP383 EFI Crate Manifest Warranty

Protection includes a 2-Year / 24,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the assembled engine, MPFI throttle body, ECU wiring harness, pre programmed controller, distributor, 153-tooth flexplate, spark plugs, and official factory warranty documentation.