Engine specs

Here we compare specs from 3 engines, all Chevy small blocks.

The first is the L69 which is what the factory gives to SS's.

The other two are both drop in replacements from GM, which are very popular.

5.0L H.O. (L69) (1987-88 issue)

  • PN:
  • Cost: about $
  • Displacement: 305 cubic inches (5.0L)
  • Horsepower: 180@4800 RPM
  • Torque: 225@3200 RPM
  • Max RPM: 5500
  • Compression ratio: 9.5:1
  • Bore & Stroke: 3.74" x 3.48"
  • Pistons:
  • Rods:
  • Heads: Cast iron, 58cc
  • Head specs: 1.84"/1.5"
  • Camshaft: Hydraulic flat tappet
  • Cam specs: .404/.415 202/206 advertised: 320/320
  • Idle: 650 rpm

    Special Performance 350

  • PN: 12355345
  • Cost: about $1700 (does not include accessories or intake)
  • Displacement: 350 cubic inches (5.7L)
  • Horsepower: 300 at 5000 rpm
  • Torque: 369 lb-ft at 3500 rpm
  • Max RPM: 5500
  • Compression ratio: 9.1:1
  • Bore & Stroke: 4.00" x 3.48"
  • Pistons: Cast Aluminum
  • Rods: 1053 forged steel
  • Heads: Cast iron, 64cc
  • Head specs: 1.94"/1.50"
  • Camshaft: Hydraulic flat tappet
  • Cam specs: 212/222 .435"/.460" 320/324 (advertised)
  • Idle: 650 rpm

    High Output 350 (ZZ3)

  • PN: 10185072
  • Cost: about $3000 (includes many accessories, intake, distributer and water pump)
  • Displacement: 350 cubic inches (5.7L)
  • Horsepower: 345 at 5200 rpm
  • Torque: 387 lb-ft at 3250 rpm
  • Max RPM: 5800
  • Compression ratio: 9.8:1
  • Bore & Stroke: 4.00" x 3.48"
  • Pistons: Cast hypereutectic aluminum
  • Rods: 1053 forged steel "pink"
  • Heads: Cast aluminum, angled plugs, 58cc
  • Head specs: 1.94"/1.50"
  • Camshaft: Hydraulic roller tappet
  • Cam specs: 208/221 .474"/.510" 308/316 (advertised)
  • Idle: 750 rpm

  • Back to the main Monte page.