Honestly I am lost in all the options. I understand that the impact has gone through tons of minor changes that are sometimes not documented in a useful way. I have 2 impact Mk2, I would normally do my own experimentation but I just dealt with a damaged Oring sealing surface @ C39 19790 so id rather not take the gun apart another 10 times.
I am trying to tune one gun in .22 to shoot jsb knockouts and leave power on the table to shoot some heavier stuff.....easy. The other gun in .25 to shoot hades on the low end of the power wheel (16 position m3 wheel) and heavyMk2's on the top end. I have 2 stock hammer springs, a ver1? fx slug kit (heavy hammer spring, light valve return spring, 2 hammer weight washers) and a tungsten hammer.
That's the stuff i have, the goals and the backstory.
Is there a rule of thumb for combinations of springs and hammer weights to allow for hammer spring(power wheel) adjustment range for a given regulator pressure?
My .25 is currently shooting MK2 33.95 @970fps, reg 130 , Power wheel 16, 700mm barrel, power plenum, heavy hammer spring(fx slug kit ver1), stock valve return spring, stock hammer 1 washer weight. Hardly any adjustability on the power wheel. My gut is telling me to increase reg pressure to stiffen up the valve.
edit: Basically i am saying that i have a bunch of FX upgrade parts and trying to get 2 pellets to shoot out of one gun with one tune. I got here with the .25 because i dumped a bunch of parts into it all at once when i upgraded my .22. So i am looking for an explanation of how the springs and hammers relate to each other at different regulator pressures. At one point in time Ted was preaching higher reg pressure to use a shorter burst of higher pressure to get more controllable results. This can't apply with different setups..