Need help from anyone that has changed the spring on a procon pump to change the PSI

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I've got a Lancer brand pump that looks identical to the procon series 1 pump(made in Italy tho), But it is rated 250psi. I want to change the spring, but I am having a hard time finding one. I am hoping some one here has changed theirs and can tell me what the difference, I heard that some on cut theirs down, Is the length the only difference?
Reply:What do you actually need for pressure?I can piss with more PSI that comes out of the torch exhaust......zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Zap,Out of curiosity, what is this pump used for?  Water cooled torch?Jerry30+ yrs Army Infantry & Field Artillery, 25 yrs agoMiller 350LX Tig Runner TA 210, spool gunLincoln 250/250 IdealArcESAB PCM 500i PlasmaKazoo 30"  vert BSKazoo 9x16 horiz BSClausing 12x24 lathe20T Air Press
Reply:I had to change mine when I got my new pump. I used the one out of the old pump. It was a lot smaller wire used. The length was about the same on both IRRC.Millermatic 252XMT 304'sDynasty 280DXHypertherm PowerMax 1250Miller Trailblazer 302 EFIOptima PulserXR feeder and XR Edge gun and more athttp://members.dslextreme.com/users/waynecook/index.htm
Reply:Originally Posted by storemanZap,Out of curiosity, what is this pump used for?  Water cooled torch?Jerry
Reply:Originally Posted by irish fixitI had to change mine when I got my new pump. I used the one out of the old pump. It was a lot smaller wire used. The length was about the same on both IRRC.
Reply:This isn't the answer to the question you asked but I installed a pressure gauge and needle valve on the output side of the pump. The needle valve controls a separate line which goes straight to the tank. I opened the needle valve all the way when I first fired up the cooler and I just closed the needle valve until I got to 50psi and it's done. I've gone the route of trying to cut, stretch, find a spring which give 50psi but the results weren't great.
Reply:Or you could use one of these:http://www.ebay.com/itm/Cash-Acme-23...3D351423265780---Meltedmetal
Reply:Originally Posted by burnsThis isn't the answer to the question you asked but I installed a pressure gauge and needle valve on the output side of the pump. The needle valve controls a separate line which goes straight to the tank. I opened the needle valve all the way when I first fired up the cooler and I just closed the needle valve until I got to 50psi and it's done. I've gone the route of trying to cut, stretch, find a spring which give 50psi but the results weren't great.
Reply:Originally Posted by SeshanThat's a good idea. I found a spring that is almost identical to the one I have just a little longer, but it is softer, I try that and if it doesn't work I'll go with a valve. I'm trying not to spend too much money on this.
Reply:Originally Posted by burnsThis isn't the answer to the question you asked but I installed a pressure gauge and needle valve on the output side of the pump. The needle valve controls a separate line which goes straight to the tank. I opened the needle valve all the way when I first fired up the cooler and I just closed the needle valve until I got to 50psi and it's done. I've gone the route of trying to cut, stretch, find a spring which give 50psi but the results weren't great.
Reply:He's right actually. If your pump is putting out 100 gpm and isn't adjustable to 60, adding a valve (the way he did) after the pump works perfectly. It's just a bypass valve like the one built in the procon. You don't relieve ALL of the pressure, obviously. Just relieve enough that you're still getting a quart or so a min out of the torch. Read what he said again.
Reply:My bad, I read output side of the tig torch for some reasonWelding/Fab Pics: www.UtahWeld.com
Reply:A bypass  regulator splits the pressure. if pump put out 250 then you set it for 60 to torch and the rest should be sent back to the tank. you don't want to bypass the pump by going back to pump inlet because the pump will over heat and destroy its self. Sending it to the tank allows it to cool before the pump pick it up again.Some pumps the spring can be adjusted by removing the acorn nut and adjusting the screw under it. But 250 down to 60 might be to much. Watch the temp on a modified pump, if it gets to hot the pump will die. Because the flow through the pump is not enough. you have to much coolant going in circles and stuck inside the pump.I think procon has max temp  information on their web site. The veins swell from heat and stick in the rotor and then grind them selves to pieces. coolant turns black. TIG torch then plugs up.
Reply:Originally Posted by ccawgcyou don't want to bypass the pump by going back to pump inlet because the pump will over heat and destroy its self.