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
406 HP @4200 RPM
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.
†Must be purchased from a participating U.S. dealer or Chevrolet Performance Authorized Reseller. Mail-in rebate offer not available with other offers. See gmpartsrebates.com for details, applicable rebate amounts, and rebate form. Rebates must be submitted by 1/31/25. Rebates may be submitted over two invoices within 120 days of each other. Allow 6 to 8 weeks for delivery of debit card. Offer valid 1/1/24 - 12/31/24.
††Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public roads, streets, or highways. Visit www.chevroletperformance.com/emissions for more details.
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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