I don't have an MRod, but I understand the idea of a depinger.... I think you are creating a plenum that is too small for the FPE level your gun is tuned to.... I assume the hole in the depinger is quite small, let's say 1/8", and it is installed right against the gauge block.... I further assume that the hole in the gauge block in an MRod is larger than 1/8", hopefully more like the 1/4" hole in the front of the valve?.... Without the depinger, if you have a 1/4" hole through the gauge block and valve front, which is larger than the exhaust ports, air can get into the valve faster than it can get out, so all of the air in the reservoir is available to keep the pressure at the valve seat at reservoir pressure, or very nearly so.... Once you put in a restriction that is smaller than the exhaust porting just in front of the gauge block, the pressure at the valve seat DURING the shot will drop.... The gun will shoot as if the pressure is lower, ie generally it will have less power and more shots.... There are two solutions to this issue.... One would be to enlarge the passages in the depinger (which may make it work less efficiently) so that more air can pass through it than out of the valve during a shot.... for an MRod a 1/4" hole should work.... The other would be to put the depinger in further from the valve.... I have seen depingers where there is a metal rod spacing it forward in the air tube to provide a large plenum to avoid this power loss.... Just placing it forward of the gauge block will likely not work, as the pressure difference across it when you shoot will make it slide back until it stops against the gauge block....Bob
Love the graph.... dontcha just luv it when theory and practice agree?.... *grin*....Bob
It would be interesting to see what happens if someone with a high FPE 25 tuned gun installs one. How much, if any, does it limit the power there?
It is obvious that is changed it significantly. It would certainly impact/change higher powered tunes.... Now, there may be value it this helping with lowered powered, more extended strings.
Hi Ron.You should call Mike at Citrus. 15 days is too long. Maybe something got overlooked. He is usually very fast with orders.Ray