Al, well done. Good read. Seeing as how I am really not nearly educated enough in this area, would it be possible to use set screws that are run from the outer tube into the valve, instead of the screws you mentioned? Unless the shear strength of the set/grub screw is pathetically weak, that is. Thanks again for hopefully opening up the eyes of lesser educated airgunners, myself included. Thanks again.
One trick to the HiPac used as it was intended to be uses, is that it only pressurizes the INSIDE of the valve. That's a lot less airea than when the whole tube is pressurized and it acts on the OUSIDE diameter of the valve. Still, I believe that there is no such thing as "too strong" or "too safe", so the only Crosman's still in use with HiPAcs have BOTH the issue screw replaced with a countersunk 8-32 AND two 8-32's from each side of the tube. Did find that using just the one 8-32/counter sunk screw worked with a 2240 running at lower pressure (2K) air and bulk co2, but I'm in the process of transforming that one into a 5mm (which will get thr 3 screw treatment and run at higher pressure).
For those who have the Powermax HiFlo SS valve: http://www.network54.com/Forum/665650/message/1442430245/Not+so+simply+in+a+world+with+humans...o+&^^&%2C+this+is+it.
Seals in the same place and (seemingly) at the same diameter as the factory valve. The first post explains "When and Why" to add the extra screws.Al
I believed the reasoning and math were fairly clear to follow...my bad for assuming.Perhaps it would be simpler for you to contact the manufacturer for his recommendation?http://www.network54.com/Forum/665650Al