This is for those of you trying to take your stock ram as far as it will go. It slightly reduces the cycling mass of the shaft and reduces the air volume needed to push the ram forward, yeilding lower lpr pressures.
Remove the stock spring bumper and guide.
Remove your hammer from the ram shaft, this may require heating it
Put the ram shaft in a vise, cut the spring guide off of it carefully
flat file the end of the shaft till it is flat again.
If you care you can sand paper and polish the end, but it dosent rub anything so its not extremely important.
Take some 17/64(little bigger or smaller dosent matter the orings will seal it up) aluminum rod stock insert it in the ram cap mark the rod so you can cut it off.
Remove the rod from the cap, cut the rod.
Drop it into the cap it should be flat with the top, if not then file it down till it is.
Next you need to mill oring grooves in the rod, the best way that i have found to do this is with a drill and hack saw. That is unless you have a lathe.
Install the rod into a drill or drillpress. You want the grooves towards one side with one being close to the end.
Turn on the drill set the hack saw blade on the rod, move the blade back and forth a little, a groove will start to form. once it is deep enough you may need to widen it with a file.
Clean the devolumizer and install the orings. Test it in the back. It should be hard to push into the back, so that it will seal off the air and hold it firmly in the back cap.
Take a peice of sewing thread about 4in long apply grease to 1in of the end, just a real light coating. Set the greased end itno the ram cap, leaving the excess to hang out. Push the devolumizer in to the ram cap with the orings closer to the opening. Carefully pull out the thread.
YOU WILL HAVE TO USE A RAM BUMPER WITH THIS MOD, or you will risk damaging your ram housing or body.
Im using a ported housing and a lightened hammer. My setup is running at 180hpr/60lpr at 8ms dwell. This mod combined with the housing porting allowed me to drop my lpr pressure about 10-15 psi and my dwell from 12ms to 8ms.
cautionary quote from GDP
Originally Posted by Goldie D Pimp
I really don't know how to say this without sounding like a pain.
I'm all about modifying things and doing stuff like this.
HOWEVER YOU HAVE TO BE CAPABLE OF DOING SO!
Doing this mod is very dangerous to the health of your gun if done improperly.
If holes are drilled improperly they can cause leaks.
If burs are not removed from the holes properly they can cause cut orings and wear in the ram.
If you do not remove every little tiny metal shaving no matter how tiny, it can easily work it's way down into the solenoid and ruin it.
If you don't take it apart incorrectly you'll scratch your ram shaft and cause leaks and more of those lovely metal shavings I've been talking about.
If done improperly you're looking at around:
$25 for a new ram shaft and hammer.
$60ish for an entire new ram housing and assembly
$60-100 for a solenoid
When you do this mod you are working with THE two most expensive pieces to replace on your bushy aside from the body. So take this into consideration when doing this.
This also voids your warranty in the biggest way possible. So if you do this mod and then something else goes wrong, then you're going to end up paying full price to have it repaired.
I don't mean to sound like a downer, but during the past month or so, I've had more rams come in for repair than I've had in the past 5 years. Most of which have had problems from doing this modification.
ALL of which I had to charge for repair, and nearly all threw a fit and got angry when they got the bill for the repairs.
If you do this, you do it at your own risk and if you mess anything up, then you're going to pay for it.