I've had an influx of enquiries coming through the comments and inbox, asking about when to short stroke and the relative timing of the tappet plates. So here's my best explanation for now.. Enjoy!
What a great tech video. This really connects the dots for me. I'm working on a 30RPS build for my son that is CQB compatible capped at 350FPS w/ .20 BB. I already have many of the elements pulled together. Will incorporate short stroking to pull the FPS down from 400 to 350. He is going to love his M4 even more :)
Your own explanation shows why you should remove from the release side of the sector gear. Removing from the release side will let go of the piston earlier, therefore the piston will return earlier giving more time before the tappet cycle starts again.
I cant see how cutting the 1st teeth off works? The fire stroke has to be completed before the tappet plate opens. So delaying the pickup serves no purpose? the piston has to be finished before tappet opens. Were as, if you cut the last teeth off the sector gear, you give more time for the fire stroke to finish before the tappet opens, in trade off you get less time for the tappet to seal.
Thank you for your video, quick question. On my Scorpion Evo I have what you call a pre-engagement. I do not want to cut the gear teeth. If I change the delayer, it can help to reduce it? Thanks.
no. the delayer chip only effects the tappet plate, it essentially stop the tappet from loading the next bb for an extra fraction of a fraction of a second. this is because on a fast RPS gun the gun won't load the next bb as the nozzle doesn't stay back long enough.... pre engagement is completely different. Pre-engagement means the piston isn't getting all the way forward before the sector gear spins back around to grab the piston teeth, so instead of the piston being all the way forward allowing the sector gears first tooth to pick up the pistons first tooth as it should, instead the 1st tooth of the sector gear ends up grabbing the piston somewhere in the middle, the issue here is the sector and piston have the same amount of teeth so if the sector grabs the piston in the middle it will then keep pulling it back longer than the piston has teeth or room at the back of the gearbox to go, that ends up in either the pistons teeth breaking off or the sector gear breaking apart or most likely the plastic piston shattering... bad news.
