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Chevrolet Performance 12371204 - Chevrolet Performance ZZ502ci/502HP Base Engine Kit

Chevrolet Performance 12371204 - Chevrolet Performance ZZ502ci/502HP Base Engine Kit
Chevrolet Performance 12371204 - Chevrolet Performance ZZ502ci/502HP Base Engine Kit

JEGS Part Number: 809-12371204

ZZ502 Base Engine
  • Short Block (Partially Assembled)

    Chevrolet Performance 12371204 Details

    ZZ502 Base Engine

  • 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
  • The 502 engines now have a mechanical fuel pump boss!
  • Comes with an externally balanced 14'' automatic transmission flexplate. Use flywheel P/N 809-14096987 and 11" clutch assembly for manual transmission applications
  • Designed for pre-1976 street vehicles or any off-road vehicle
  • Not intended for marine applications
  • For long blocks and partial engines with steel camshafts, a distributor with a melonized steel gear must be used or engine damage will occur. Distributor #809-93440806 is recommended.

  • Chevrolet Performance ZZ502ci/502HP Base Engine Kit

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    Chevrolet Performance Parts offers the entire ZZ502 engine as a kit, because nothing is quite as satisfying as building your own high-performance big block. Kit includes short block, aluminum oval-port heads, forged steel crank and rods and forged aluminum pistons. It also includes a hydraulic roller cam, valve train and valve covers. Every part is engineered to work together to deliver 502 horses and 567 pound-feet of torque!

  • Bore x Stroke: 4.47 x 4.00
  • Block: Cast iron with 4-bolt main caps
  • Crankshaft: Forged steel
  • Connecting Rods: Forged steel
  • Pistons: Forged aluminum
  • Camshaft: Hydraulic roller
  • Camshaft Lift: 5.27 Intake/.544 Exhaust
  • Camshaft Duration @ .050": 224° Intake/234° Exhaust
  • Cylinder Heads: Aluminum oval port, 110cc chambers
  • Valve Size: 2.25 Intake/1.88 Exhaust
  • Compression Ratio: 9.6 to 1
  • Rocker Arms: Stamped Steel
  • Rocker Arm Ratio: 1.7 to 1
  • Recommended Fuel: 92 Octane
  • Ignition Timing: Base 8° BTDC, 30° total
  • Maximum Recommended RPM: 5800
  • Balance: External

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