Originally Posted by 2011RitterGC
Why?? If you are "turning back on" 4 cly why would it matter which 4?
I think you mean "Why does it make a difference between alternating cylinders and "lighting" them every few seconds?"
If you are alternating cylinders, then EACH rotation you have to switch one back to the next. So, as RPMs increase, the time you have to inflate the lifter goes down. Less than .02 seconds at 3000 RPM, for instance. Inflating a hydraulic lifter is NOT that fast.
If you "light" them every 10 seconds, you can just inflate the lifters for a second, and not really care about how many revolutions that amounts to.
This is based on what NetJunkie said -- "...4 fires, then on the next cycle
the other 4 fire."