A disapointed customerr

[V8COOPMAN]

Originally Posted by ford38v8

Well son if a gun, my eyes weren’t playing tricks on me after all! It didn’t occur to me to consider the firing order! Coop, you get the chicken dinner ’cause your head is in the clouds unlike clouds in my head! Oh, the odd number of cilynders? Would that be to defeat any set of symbiotic vibrations that would occur with even numbered cylinders? (Poor wording, I know.)

Alan .....OK, this ought to let YOU off the hook for the chicken dinner, since you seem serious about wanting to understand. Keep in mind that the ODD number of cylinders has everything to do with FIRING ORDER. You have already looked at this simple firing order on the 5-cylinder radial engine.





On the 5-cylinder engine, #1 fires, skip ONE cylinder and #3 fires. Then we skip a cylinder and #5 fires. Then we skip #1, and #2 fires. Then we skip #3 and #4 fires. After #4-cylinder fires, the next in line to fire would be #1 since the order skips ONE cylinder (#5) before firing again. So let's add a #6-cylinder. It may help to sketch this out. Keep this 'new' engine configuration with #1 at the top. Looking from the rear of the engine, the firing order will rotate clockwise, skipping ONE cylinder every time before the next cylinder fires. So, with 6-cylinders, the first cylinder to fire would be #1. After skipping #2, #3 would fire. The next cylinder to fire in the sequence would be #5-cylinder since we skip ONE cylinder every firing. Remembering that we now need to skip a cylinder (#6), which would put us back at #1-firing....NOT #2-cylinder as it previously would have been with the ODD-NUMBERED 5-cylinder engine. The firing orders with EVEN NUMBERS of cylinders just will not work-out in "happy" fashion, no matter how many EVEN-numbered cylinders you have. Gotta be ODD numbers! Coop

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