Specifications

8.27

PCM Chevrolet Python

Displacement CID / liter 496 / 8.1

Bore (inches) 4.25”

Stroke (inches) 4.37”

Compression ratio 9.1 : 1

Horsepower @ 5,000 RPM 425

Battery recommended Min. CCA 600 note #4

Fuel injection (Multi Point) 8 ECM

Spark plug number 14mm Platinum TJ 14R-P15

MAX (Intermittent) RPM 5,000 note #9

Continuous cruise RPM’s (max) 3,800 - 4,000 note #2

Idle speed (in forward gear) 650 ECM

Distributor (marine approved) None ECM

Ignition timing @1,000 rpm Preset ECM

Spark plug gap .060”

Firing order 1-8-7-2-6-5-4-3 ECM

Fuel pump (low pressure feed) 5-6 psi note #1

Fuel pump (high pressure injector) 43 (+/-2)psi note #1

Oil pan capacity 8 qt. note #5

Oil filter on engine block PCM #R077002

Oil filter remote style PCM #R077001