HT502 Big Block Crate Engine

HT502

Rebuilding alternative

Our HT502 crate engine is an affordable alternative with more power than our factory-installed Big-Block, producing a whopping 541 lb.-ft. of trailer-tugging torque.

PART NO. 88890534

WhyBuy

406 HP @4200 RPM

WhyBuy

541 LB-FT @3200 RPM  

More Torque

The HT502 is uniquely suited to pre-1978 trucks, but is adaptable to a variety of applications, and it’s built with our latest generation block casting with four-bolt main caps. An all-forged rotating assembly delivers exceptional strength and durability.

Connect & Cruise Powertrain System

Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit installations in older vehicles.  

Installation Guides

Find everything from vital data about your engine’s capabilities to how to install it into your build.

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

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  • Requires available Performance Exhaust or Z51 Performance Package.

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