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GM Performance 425 Horsepower ZZ383 Long Block, Small Block Chevy Engine

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Specs
Sold in Quantity:
Each
MFG. Part #:
19301295
Rear Main Seal Style:
1-piece
Camshaft Type:
Hydraulic Roller Tappet
Piston Material:
Hypereutectic Aluminum
Garage Sale:
No
Crankshaft Material:
Forged 4340 Steel
Connecting Rod Material:
Powdered Metal
Engine Displacement:
383
Horsepower:
450
Torque:
449
Cylinder Head Material:
Aluminum
Crate Engine Type:
Long Block
Maximum RPM:
6000
GM Performance 425 Horsepower ZZ383 Long Block, Small Block Chevy Engine
GM Performance 425 Horsepower ZZ383 Long Block, Small Block Chevy Engine

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GM Performance 425 Horsepower ZZ383 Long Block, Small Block Chevy Engine

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What's in the Box

The all new ZZ383 offers Big Block performance with a Small Block price tag.

GMPP starts with the legendary Fast Burn cylinder heads and the 383cid bottom end, to offer an incredible 460 ft. lbs. of torque @ 4500 rpm with a smooth, linear delivery. The combination of a 3.800 steel crank and a stout .509/.528 lift hydraulic roller camshaft produces 450hp @ 5400 rpm, making the ZZ383 the benchmark by which all other 383cid small blocks will be measured.

GM's testing was completed using a GM single-plane intake manifold, a 750cfm Demon mechanical secondary carb, and 1-3/4 primary x 33 length headers with a 4 collector. A dual-plane intake manifold can be used, but will affect overall peak performance numbers by 15-20 HP.

Specifications:
  • Power: 450 HP @ 5400 RPM, 449 ft. lbs. of torque @ 4500 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, 32 degrees total
Engine Includes:
  • Fully GM assembled long block
  • Black Aluminum Valve covers
  • GM Eliminator Single Plane Vortec Intake Manifold
  • Oil pump, pick-up and oil pan
  • 12-3/4” Auto Trans Flexplate
  • 8” Harmonic Balancer
  • Front timing cover
  • Cast Iron Long Water Pump
  • Oil Filter and Adapter
  • Passenger Side RH Oil Dipstick and Tube

Warranty:

General Motors limited 2 year / 50,000 mile parts & labor warranty.

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Dyno Sheet (PDF)  (Note: This sheet represents one example engine. Your individual engine may differ slightly.) 

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Crate Engine Installation Guide

Truck Freight Shipping Charges Apply - click here for details.

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Crate Engine Installation Guide

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Professional Power Plus Crosswind 1957-95 Chevy Plain Intake Manifold
                        

If you are running a maximum effort S/B Chevy V8, then this is the intake for you! The Professional Products Crosswind manifold is a high performance dual plane, 180° manifold designed to be used with Holley, Carter AFB, or Edelbrock square flange carbs. The unique design isolates the plenum from the heat generated by your engine, which will give your engine a cooler air-fuel mixture and make more horsepower.

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NOTE:  **Will not work with billet roller cams!**