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Old 09-28-2012, 04:46 PM   #11 (permalink)
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^Very cool!!!

Yea, I think the absolute min for any standard nelson (without a heavily mod'd valve system I mean) is like 400-450. Until those smart folks on here figure out a new valve system, I'm going to be sticking to mostly medium to medium-high to high pressure operation. Just to many problems with low pressure to be in any way practical... besides, they work pretty darn well at higher pressure
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Old 09-29-2012, 03:01 PM   #12 (permalink)
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Quote:
Originally Posted by dardagnan View Post
My phantom 410 psi => 280 fps
sorry my English is verry bad
Phantom et pompe souple | shadoks-paintball.fr

This is huge! Great work dardagnan!
I believe splattttt had a reg'ed phantom working at 450 to 550psi (he ultimately found that although it was capable of being run as low as 450psi, it was more consistent within the higher end of the pressure range, iirc).

After much brainstorming/theorizing/testing (see Nelson Valve Evolution (Project Leprechaun), in custom projects forum) many have come to the conclusion that modifications to the powertube and valve are necessary to further the lower pressure threshold of nelson feasibility. Some have mentioned the possibility of increasing valve volume by using an RTR valve body.

You may have re-emphasized the importance of increased valve space.

dardagnan: Did you alter your powertube, or are you using a stock CCI powertube? open faced or three ported TPC? Oh, and thank you: I can now put my French-Linguist-grad-student-girlfriend to work translating for me! No problem with your english here! keep your posts coming. thank you for your contribution.
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Last edited by Legolas; 09-29-2012 at 03:48 PM.
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Old 09-30-2012, 06:01 AM   #13 (permalink)
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no modifications to the powertube and valve only the spring which is longer and flexibility (souple)



my TPC Drilled for 3mm



my spring enter hammer and bolt is longer and very flexibility (Photo with my sring and one of origin)

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Old 09-30-2012, 11:39 AM   #14 (permalink)
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Very interesting! Did those springs come from another paintball gun (i.e. sypder)?
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Old 09-30-2012, 03:27 PM   #15 (permalink)
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I translated his blog and iirc, he got some parts at a hardware store
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"Certainly there is no hunting like the hunting of man and those who have hunted armed men long enough and liked it, never really care for anything else thereafter." Ernest Hemingway, "On the Blue Water," Esquire, April 1936

In the world I see - you are stalking elk through the damp canyon forests around the ruins of Rockefeller Center. You'll wear leather clothes that will last you the rest of your life. You'll climb the wrist-thick kudzu vines that wrap the Sears Tower. And when you look down, you'll see tiny figures pounding corn, laying strips of venison on the empty car pool lane of some abandoned superhighway.

Visit my Etsy store:
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Old 09-30-2012, 09:32 PM   #16 (permalink)
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Alright, thanks! I was hoping he had used something like a spyder main spring, but I guess not..
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Old 10-01-2012, 06:48 AM   #17 (permalink)
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Quote:
Originally Posted by Legolas View Post
I translated his blog and iirc, he got some parts at a hardware store
yes
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Old 10-01-2012, 04:19 PM   #18 (permalink)
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Sub 400 PSI was possible with a milled hammer, springs, and ported powertube and TPC. My cocker tinkered friend experimented with spring combos and he got to mid to high 390s. Pointless because it had no consistency or efficiency. Stick to the KISS theory and stick to the +500 output PSI.

The second valve spring is modified by a friend with medium stiffness. Third valve spring is much longer and very lighter, similar to Dargaan's valve spring setup and available in hardware stores per my request. My hammer spring is also longer but similar stiffness, I believe it is Nelson/cocker based.

I also have a 3 mm drilled and ported TPC.




Last edited by cncaliguy; 10-07-2012 at 10:13 PM.
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Old 10-01-2012, 08:45 PM   #19 (permalink)
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so cool
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