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Old 02-08-2007, 10:28 PM   #1 (permalink)
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performance tuning a PGP

Right, so I want to tune my PGP a bit. Get a little more than 20 shots out of it, making it a little more acurate, quicker to load, you know what I mean.

Stuff I figured I should do:
- Install a quick changer and speed feed. Maybe a velocity adjuster. Should be no problem.
- Polish the barrel. How would I do this?
- Tune the valve... now this will probably be the biggest problem... I'll need a valve tool to get it out of the body, but where do I go from there?

Now, before you all say "send it to Palmers/other shop", note that I don't live in America. Not only do I lack the funds for the actual job, shipping and tax will be like $100! That, and there's a fair chance I won't get it back. I've had a PGP come over from America before, and it never arrived. The customs took it because it's on some 10 year old list of illigal guns (The weapon laws changed long since, but they seem to have forgotten about the list...).

Also, ordering parts is a "rather not unless I really have to". Which will probably be the case for the valve tool...

So basicly, unless someone knows a decent shop in Europe, I'll have to do this myself like I've always wanted to. :P

I know there must be a ton of information somewhere, so just pointing me in the right direction is already a big help!
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Old 02-08-2007, 11:59 PM   #2 (permalink)
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Well, the first thing people are going to ask you is "cartridge valve or non-cartridge valve." Basically, the older PGPs are non-cartridge, the newer ones are cartridge. You can get much better results with a non-cartridge PGP, but cartridge PGPs are easier to work with. For polishing the barrel you can go two ways....you can use a honing tool, which could take a lot of material off...or you can use a swab with brass-o and a lot of elbow grease (or a low speed hand drill.) The honing tools are riskier, and you probably don't want to take off too much material with paint getting smaller and smaller these days.
As far as the valve tuning, I know that Palmer's increases the port size from the valve into the barrel, but I don't know the exact size. I believe they also polish the valve.
That's as far as my knowledge goes, but there are a lot of folks that hang out on this board that have done this, so I am sure someone can provide more details for you.
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Old 02-09-2007, 09:16 AM   #3 (permalink)
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Alright, thanks sofar.

The valve is a non-cartrige one.
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Old 02-09-2007, 01:25 PM   #4 (permalink)
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This thread: http://www.mcarterbrown.com/forums/s...ad.php?t=10480
might help you a bit.
You might want to try searching on the PGP owners group forum and here if you haven't already. I seem to recall seein a thread or two that gave details about what is actually done during a performance tune.
http://pgpog.org/cgi-bin/yabb/YaBB.cgi?board=PGPOG
Good luck!
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Old 02-10-2007, 04:59 AM   #5 (permalink)
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I'm not going to swear to all of what the performance tune involves, but iirc, they open up the exhaust holes, trim the valve stem slightly, and polish it all. It all serves to improve flow. You might see if you can get a turbo valve. I've heard mixed things about them. The story was the extra porting didn't do anything since the transfer hole in the barrel was still the same size. Maybe...I'll let you know when I try mine...The one kicker on turbo valves, they are CA only, as their cup seals don't have pierce pins...(oh that's what I forgot, I think Palmer also switches it to an Insta pierce, and eliminates the cupseal mounted piercer)

As far as barrel polishing, I got a 5/8" wooden dowel, cut a 2" slot in the end of it, and wrapped a piece of denim rubbed in rouge around it such that it fit pretty snug in the bore. Then spun in back forth/in out by hand (I did add a drill arbor later)...Then finished it off with a bit of Nev'r'dull. (Wool wadding with "brasso" on it...use outside, pretty strong smelling stuff) I'd stay away from flex hones for the most part. They work, and I've used them on a couple of steel barrels I was making...but unless you're correcting major scratches/corrosion (use the 1000 grit ones) the various brass, rouge, Nev'r'dull, rubbing compounds works great...

Catchya on the Flip Side.....

Emerald Wolf -- loves them PGPs...
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Old 02-10-2007, 01:32 PM   #6 (permalink)
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Alright, I think I've got enough info on most things for now. Thanks!
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Old 02-10-2007, 06:34 PM   #7 (permalink)
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We want pics & details when you are finished!
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Old 02-10-2007, 11:48 PM   #8 (permalink)
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By the way...although the Palmer's valve stem looks like it's easy to replicate, if you try shaving your own, it'll end up snapping pretty quickly.
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Old 02-11-2007, 12:41 PM   #9 (permalink)
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Well, before I can do any valve work, I'll need a valve tool. I'm going to order one tomorrow or something.
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