This video demonstrates the firing interval of a 90 degree V4 engine with a crankpin offset of 180 degrees. Cylinder pairs 1&2 and 3&4 share a crankpin each.
Firing order is 1 4 3 2
Firing interval is 1 at zero degrees, 4 at 90 degrees, 3 at 180 degrees, 2 at 270 degrees, or 1 4 3 2 0 0 0 split into 8 quadrants.
Ещё видео!