samanoususke

Low pressure, in general is a concept that bugs me.

If you look at the threads in the forum, you will see a huge number of them relate directly to LP guns that aren't working. They WERE working, and the people who own them are unwilling to go back to a working setup.

Look, stock spyders/draguns will cycle back down 350-400 psi... STOCK. This is your safety margin. IF your n2 system isn't up to the task, or the co2 tank chills down, that is what stops the gun from farting.

The guns were designed to run with 500-900 psi going into them. This is where they work best. running low pressure has no inherant benifits. LP started with cockers, where low pressure lets you run much lighter hammer springs. This in turn lets them run lower cocking pressures (with problems in it's own right) This does not hold true in spyder type guns.

To run an effective LP setup in a spyder you need to run astock springs, or even heavier hammer springs. (the only spring in the gun that effects chopping) And where does that lead you to? More chops if you misfeed.

With slightly worn stock springs you can expect the gun to STOP on misfed paint, not chop it. Out of the box the guns get good gas efficancy. Most of the home-made low pressure setups actually sacrifice efficancy for pressure numbers. Now what benifits are in that?

It may "FEEL" different, but when running heavier springs in the gun, the recoil is HARDER, not softer. When you're running heavier hammer springs, and softer valvesprings, the valve is open longer, and is dumping more energy into the recock, sucking up gas efficancy.

The BEST "low pressure" setup on spyders is that made by AKA. The AKA rig ran completely stock springs. it also doubbled the efficancy of hte gun. (yes I did say doubble) And it still ran 350-400 psi.

This is especially true with the new generation of slim striker spyders. Smaller parts require higher pressure... now that's NOT a problem. The lighter recriprocating weight of the slim striker guns mean that the gun will need less energy to recock the gun.

I'm tired of people trying to "FIX" guns that they broke and are unwilling to return to a working condition.

This is taken from Nerobro at PBN.

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Badinflewinse

Seems like a good post overall. I'm glad you were honost enoguh to give credit where credit was due. Two thumbs up from me.

Javaman

A+ post. Very insightful stuff. From first hand experience I can certainly agree with the stronger mainspring=greater kick. Perhaps a better combination would be a weak mainspring and a weak valve spring but with less of a valve pin notch. As long as you can still get it to recock you would be sending more into into the barrel before the striker gets enough air to move back and open the bolt seal with the breach. I'm pretty sure this is the same problem with my Delta, where too much air is feeding to the striker, cocking it back before enough air can get through the barrel causing me to max out at 240 with all spring combos. I would like to reduce the notch size of my valve pin but I'm unsure what compound would stick well enough to avoid the abuse. The hard part would be making sure it would recock. (Something the weaker spring would assist) I hadn't even considered the part about chopping more misfed PBs because of a stronger mainspring before. Good stuff man.

*edit* whoops, I didn't notice until now that you didn't write the post. At least you credited the author. Can you link the thread so people can follow up on it?

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j_dogg

Yeah, I realized most of what he says long ago. "LP" is mostly a fad, and if it's done wrong it makes your gun suck. I've got spyders down to 400 psi with a med/med-light mainspring and light valve spring. Runs good, efficant, and few chops.

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samanoususke

Here's the link that you wanted Javaman
http://www.pbnation.com/showthread.p...hreadid=108852

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shawn b.

I lowered my air pressure for the main reason that I like to shoot my gun in my back yard every now and again, and I don't want the neighbors to think that I have some rapid fire, clip fed shot gun going off. My gun is much quiter, and it is quite efficient.

Plus, chops suck. I'd much rather have to recock my gun because it pinched rather than have waste a few shots cleaning out my barrel and later have to strip it down and clean it.

Javaman

Thanks for the link. I'm not sure why PBN's thread was closed but there was some interesting info there.

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TerminAZN

I think i can also go to pbnation and copy a post and paste i here

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<---- ITS ME!---->

K!nGm@N sPyd3|2 3$pR!t*LOW PRESSURE* ALSO F/T
http://www.pbnation.com/showthread.p...hreadid=832717
-Java Alum. feedneck
-50g switch
-new j&j ceramic 14
-swoosh trigger
-new thumb velo. adjuster
-polished internals
-dragun reg
-timmy bolt
-milled striker
-modded valve
-32* spring kit

samanoususke

Really? Me too.

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