Product Details
Don’t bother repowering your trusty Big-Block-powered truck with a rebuild or reconditioned used engine. The HT502 crate engine is an affordable alternative with more power and greater durability, including a whopping 541 lb.-ft. of trailer-tugging torque. That’s more than the factory ever offered and more than you’ll get with a stock-type rebuild. It is uniquely suited to pre-1978 trucks, but is adaptable to a variety of applications, and it’s built with a brand-new, latest-generation block casting with four-bolt main caps. An all-forged rotating assembly delivers exceptional strength and durability, while a mild 8.75:1 compression ratio is suitable for regular gasoline at all altitudes and engine loads. The assembly comes with the heads and a balancer installed. An induction system, ignition, starter, water pump and other accessories are required to finish the engine. All necessary components are available from Chevrolet Performance.
Specification
HT502 Tech Specs
Part Number: 88890534
Engine Type: Chevy Big-Block V-8
Displacement (cu. in.): 502
Bore x Stroke (in.): 4.470 x 4.00
Block (P/N 19170540): Cast-iron with four-bolt main caps
Crankshaft (P/N 10183723): Forged steel
Connecting Rods (P/N 19170198): Forged steel, shot peened
Pistons (P/N 12533507): Forged aluminum
Camshaft Type (P/N 12552296): Hydraulic roller
Camshaft Lift (in.): .480 intake / .483 exhaust
Camshaft Duration (@.050 in.): 204° intake / 209° exhaust
Cylinder Heads (P/N 12562917): Iron oval port; 118-cc chambers
Balanced: External
Valve Size (in.): 2.070 intake / 1.730 exhaust
Compression Ratio: 8.75:1
Rocker Arms (P/N 12523976): Stamped steel
Rocker Arm Ratio: 1.7:1
Flexplate (P/N 10185034): 14"
Recommended Fuel: Regular pump
Ignition Timing: Base 34° Total @ 4,000
Maximum Recommended rpm: 5500
