Chevy Big-Block V8 (396, 427, 454) Firing Order

Firing order: 1-8-4-3-6-5-7-2 (18436572).

Cylinder numbering: Left bank 1-3-5-7, right bank 2-4-6-8

Firing order diagram

TIMING END ▲Distributor turns clockwise (viewed from the top)1134567728436582Driver sidePassenger side
firing order 1-8-4-3-6-5-7-2. The small number by each cylinder is its place in the firing order.

Details

EnginesChevrolet Mark IV / Gen V / Gen VI big block: 366, 396, 402, 427, 454, 502, 572. NOT the Vortec 8100.
Years1965-2000, crate engines later
Firing order1-8-4-3-6-5-7-2
Cylinder numberingLeft bank 1-3-5-7, right bank 2-4-6-8
Distributor rotationclockwise

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