A-5 Low pressure mod

Everyone is always looking to get the best setup for their marker, and the reason for the forums is just that. I think I could spend hours searching the forums and glean almost all the info I need on this subject, but I am wondering how many others have a similar setup and what they did to dial it in.

I am looking for real facts, not opinions on anyone having an A-5 with the LP kit, and what combos they are using, (i.e. air, barrels, regulators, triggers, bolt, etc.), and why they think it works best in their playing environment. Accuracy and paint type would help this topic as well.

Game on!

What I got going now is an LP kit , with a Palmer Fatty reg, stock bolt as it seems to seal better than the starfire(o-ring appears to be too far back to engage anything), flatline, 32 degrees terminator, with comp air...
I have been using the 32 degrees barrel, where my friend is using the flatline. The flatline is shooting all over the place, not real consistant,  freshly cleaned. I believe his is set at about 275-280 fps. I am shooting allot more consistant at 290fps. We have tried turning up and down the FPS to get better accuracy, more consistantcy with the flatline, but it just gets worse. This started just after putting in the LP kit.

Any comments?



Edited by ashesthedog

325 is the pressure. He is good about keeping it clean.
He has tried many different types of paint. Evil seems to be what shoots best for him right now.
I need to get out there and try my FL out. I haven't put much paint throught it since I have had it. I am wondering if its his barrel...
I am curious about your bolt choice. Started to read up about it, but thats as far as I have gone with it.
We have the e-grip as well, I failed to mention that earlier.

LordJovian is right, PMI Premiums and Marballizers seem to work the best.

I thought about going LPK with mine but my expansion chamber satisfies me for now. It is hot where I live.

I am the friend ashthedog has refered to.   I have dinked around a lot with the flat line, learned the lesson of the "dirty barrel" and how to fix it (Boil the barrel for an hour in soapy water, alcahol also work well for the field). I have shot a miriad of different typs of paint through it including marbs, evil, allstar, anarchy, big ball and many more. The accuracy was fine with evil, and marbs before the LPK, after the install of the LPK none of them shoot well. Even my velocity consistency has gone to pot, before with CO2 I had the marker dialed in to hold +-2fps 95% of the time with many tests running the exact fps for 3-4 shots in a row. Now I am lucky to be holding  +- 5fps, so now it is theory time......

Here is my theory on the matter, The flat line works by forcing the paint to the top of the barrel, then when the paint is there excess gas starts to escape under the paint causing a cushion or air under the paint forcing the paint further against the top of the barrel causing the paint to be "rolled" out the top of the barrel and giving it the back spin that causes the desired flight path. This being said logic dictates that when one is running 800psi as opposed to 325psi the force applied to the underside of the paint is lessoned by over half causing less force to be applied and less "friction" against the top of the barrel, thus causing inconsistant spin and inconsistant flight path. This also I believe is the reason for the drop in velocity consistnecy with the chrono. This is open for debate, but only by people that understand physics and what is happening not those that "feel like" something will cause something else. My physics mentioned above is sound, I am looking for something that I am overlooking. Thanks

bobbyg nice set-up.  i don't like the stubby though  sorry....

 

Lightningbolt wrote: bobbyg nice set-up.  i don't like the stubby though  sorry....

Thanks, I picked the stubby because the A-5 is alittle long with a normal tank.

Rocket Man wrote: Thanks BoobyG, I have been running at 325psi and have occational issues with having enough pressure to reset the bolt, especially when there is no ball in the chamber to create the extra back pressure. Do you ever have those issues? Thanks

If you have done a FVA mod or have a JCS Gold powertube with no FVA installed then you will get that problem sometimes. But who cares about how it shoots without balls. I know alot of peeps that have to run 400 to 425psi to make their A-5 shoot right.

I run at 400psi with my A-5. I use the green maddmann spring inorder to
reduce recoil and so must run at a higher psi than with the stock drive
spring. I find that with the lighter spring I get less recoil however and much
prefer the reduced recoil at high rates of fire.

Of course I could use a heavier drive spring and run my A-5 at a much lower
pressure if I wanted to...