Impact .25 valve flow adjuster question

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"Carpguy"My impact silver. 25 doesn't have the white marks on the valve flow adjuster, just solid lines .. does anybody have this to.. if so where are you setting it... my power wheel is different to. Numbers pn one side letters on the other... just got the gun and was looking for advise before i start turning knobs.. lol
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the lines are still spaced the same I believe just no short one just all long one. 
first thing is you should max the hammer spring(Ernest Rowe has the video on it) from there it's just all chrono work iI think. 
On my impact the reg is set to 130 the valve is set on the forth line and the hammer adjuster is on 5.
I'm getting 50 shots at about 860 or so with the 34s. I also have my transfer port hole milled out that's why my reg is at 130 not 140
I'm still messin with to find the best speed bit I usually shoot in 4 power and that's around 830fps
 
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" ...my power wheel is different too. Numbers on one side letters on the other... "
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The power wheel is a cam that mates with the adjuster. The high point on the cam is coincident with the "Max" setting. The low point matches the "Min" setting. The cam contour is basically milled the same on each side on the Crown and I suspect it may also be for the Impact. Thus the numbers on one side and the letters on the other side basically match up. So A equals 5, B equals 4, C equals 3 etc. There may be a very slight difference in velocity attained by matching points on the cam. If there is then it could be used to fine tune to a more precise velocity. .... My assumption is that the Impact and the Crown are similar there. I stand correction if mistaken.
Hope this helps and makes clear reading. ... Kind regards, Harry in OZ.
 
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