HT502

406HP @4,200 RPM / 541 LB-FT TORQUE @3,200 RPM
price: $6,876
part number: 88890534
Contact Us Add to Cart Catalog

    An affordable, high-performance alternative to rebuilding If you’re thinking about repowering your trusty Big-Block-powered truck, don’t bother with a rebuild or a reconditioned used engine. Chevrolet Performance’s HT502 crate engine is an affordable alternative with more power and greater durability. The HT502 is rated at 406 horsepower and 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. We build the HT502 with a forged crankshaft, rods, and pistons for maximum strength, and they’re installed in a new version of the Big-Block cylinder block. It is updated for greater strength and performance capability. A conservative 8.75:1 compression ratio ensures pump-gas performance at all altitudes and engine loads. Our assembly comes with 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.

    Part Number: 88890534
    Engine Type: Chevy Big-Block V-8
    Displacement (cu in): 502
    Bore x Stroke (in): 4.47 x 4.00
    Block: Cast-iron with 4-bolt main caps
    Crankshaft: Forged steel
    Connecting Rods: Forged steel, shot peened
    Pistons: Forged aluminum
    Camshaft Type: Hydraulic roller
    Camshaft Lift (in): .480 intake / .483 exhaust
    Camshaft Duration (@.050 in): 204° intake / 209° exhaust
    Cylinder Heads: Iron oval port; 118cc chambers
    Valve Size (in): 2.07 intake / 1.73 exhaust
    Compression Ratio: 8.75:1
    Rocker Arms: Stamped steel
    Rocker Arm Ratio: 1.7:1
    Flexplate: 14"
    Recommended Fuel: Regular pump
    Ignition Timing: 34° Total at 4,000 rpm
    Maximum Recommended rpm: 5,500
    Balanced: External

    • Requires the addition of carburetor, intake manifold, water pump, fuel pump, starter, 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
    • 502 engines now have a mechanical fuel pump boss! NOTE: There is NO fuel pump lobe behind the boss.
    • Comes with an externally balanced 14" automatic transmission flexplate. Use externally balanced 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

Disclaimer: Vickar Community Chevrolet reserves the right to withdraw, change, modify or cancel this powertrain promotion program, any placed or in progress orders and the prices advertised at any time for any reason without prior written notice. Final decisions in all matters relating to the interpretation of any rule or aspect of this program rest solely with Vickar Community Chevrolet.