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Chevrolet Performance 454 HO Crate Engine

Brand: Chevrolet Performance

Part Number: 12568774

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$6,251.73

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454 HO 7.4L Chevy Big-Block Chevy Crate Engine

Big Torque on a Budget!

The Chevrolet Performance 454 HO crate engine is a Big-Block bargain – an affordable engine with performance specs that will make you think it’s 1970 all over again!

A new-style block casting with four-bolt main caps includes an all-forged rotating assembly for great strength and durability. It also uses a smooth hydraulic roller camshaft for excellent drivability and asphalt-wrinkling performance. Rectangular-port cylinder heads with large, 2.19/1.88-inch valves, round out the assembly.

The package includes a water pump, balancer, 14-inch flexplate and an aluminum intake manifold. Simply add a carburetor, ignition system and starter and your muscle car or street rod will be ready to roar.

454 HO 7.4L Chevy Performance Crate Engine

438 hp @ 5,300 rpm / 500 lb.-ft. @ 3,500 rpm

 

Big Torque on a Budget!

The Chevrolet Performance 454 HO crate engine is a Big Block bargain – an affordable engine with performance specs that will make you think it’s 1970 all over again, including 438 hp and 500 asphalt-wrinkling lb.-ft. of torque.

A latest-generation block casting with four-bolt main caps is the Chevy Big Block engine's foundation and features an all-forged rotating assembly for great strength and durability. It also uses a smooth hydraulic roller camshaft for excellent drivability and a broad performance range. Rectangular-port cylinder heads with large, 2.19/1.88-inch valves, round out the assembly.

This GM 454 HO crate motor package includes a water pump, balancer, 14-inch flexplate and an aluminum intake manifold. Simply add a carburetor, ignition system and starter and your muscle car or street rod will be ready to roar. All of the necessary parts are available from Chevrolet Performance.

 

12568774 Chevrolet Crate Motor

454 HO Tech Specs:
Engine Type: Chevy Big Block V-8
Displacement (cu in): 454
Bore x Stroke (in): 4.250 x 4.000
Block (P/N 19170538): Cast-iron with 4-bolt main caps
Crankshaft (P/N 14096983): Forged steel
Connecting Rods (P/N 19170198): Forged steel
Pistons (P/N 10215228): Forged aluminum
Camshaft Type (P/N 24502611): Hydraulic roller
Camshaft Lift (in): .510 intake / .540 exhaust
Camshaft Duration (@.050 in): 211° intake / 230° exhaust
Cylinder Heads (P/N 12562920): Iron rectangular port; 118cc chambers
Valve Size (in): 2.190 intake / 1.880 exhaust
Compression Ratio: 8.75:1
Rocker Arms (P/N 12523976): Stamped steel
Rocker Arm Ratio: 1.7:1
Water Pump (P/N 19168606): Cast-iron, long-style
Flexplate (P/N 10185034): 14"
Recommended Fuel: Premium Pump
Ignition Timing: Base 4° BTDC, 26° Total
Maximum Recommended rpm: 5,500
Balanced: External

 

Recommended Transmission:  SuperMatic™ 4L85-E Four-Speed Automatic P/N 19300175 or T56 Super Magnum 6-Speed Manual P/N 19329795

 
Click here to view/download specifications and installation information.

Installation Notes:

  • Requires addition of carburetor, starter, fuel pump, distributor and ignition system (not included)
  • Clutch linkage bosses are now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads for clearance
  • Comes with an externally balanced 14" automatic transmission flexplate; use flywheel P/N 14096987 and 11" clutch assembly for manual transmission applications
  • Designed for pre-1976 street vehicles or any off-road vehicle
  • Not intended for marine applications

Note: Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage will occur. GMPP HEI distributor P/N 93440806 is recommended.

Chevrolet Performance Crate Engines include a 24-month or 50,000-mile (80,000 kilometer) limited warranty.

Click here for more detailed warranty information.




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