Inliners International Forums General Discussion Bench racing 6 cylinder firing order(s)

Hi Rod . . .

The crank layout and the cam must differ with this difference in firing order.

The Chevy crank has three pairs of throws 1-6, 2-5, and 3-4 which are at TDC together. Listed this way we can see that the firing order is simply odd-odd-odd, even-even-even, across the throw-pairs.

The H-S firing order implies a slightly different crank lay-out with throws paired the same but arranged in a different order in rotation 1-6, 3-4, 2-5 (the order in which they TDC). The cam has to follow the crank layout.

There is neat toy on this site dedicated to aircraft engines that shows firing order diagrams for different engines.

regards,
stock49