I've been looking for this info here and on other place online, but can't seem to find it...... Simple question with a hard to find answer it seems. I was studying a pic of a Banger crankshaft and it looked like they fire cylinders 1 and 4 at the same time then cylinders 2 and 3 at the same time. Is that right? Or do they have a different firing order?
I'm guessing you're asking about old flat head bangers (T's, A's & B's). Standard firing order is 1,2,4,3. (edit) Duh, now the picture appears, after my response.
And--your query comes from the fact that cylinders attached to that crank will obviously go up and down in pairs, I think. Remember that a full cycle of everything is 720 degrees, not 360!! At the time one cylinder is at TDC ready to fire, its companion is at TDC finishing up the exhaust stroke--they are running 360 dgrees out of phase, which puts them in the same place but with different employment...
Yes, I am aware of that but wasn't sure if firing in pairs gave the Model A/B engine it's distinctive sound or not. The answer is no, it's the 360 degrees out of phase that gives it it's sound. Thanks for clearing that up for me.
Most 4 bangers have a similar crankshaft setup to the model A and have a similar firing order. the thing that gives it the sound is the fact that it is a flathead and is unbalanced. 12k rpm bike motors have the same firing order.....
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