A-5 - Low Velocity when using HPA

Hello all,

I have seen these threads before...but have never seen a good solution.

I have an A-5 and so do 2 other friends of mine. We have just converted from CO2 to HPA. We have 4 differnt HPA tanks. I actually have 2 - a 68 3000 Pure Energy preset at 850psi, and a Nitro Duck with adjustable reg. All of us are unable to get a velocity of over 250fps.

Note, we have NO problems on spyders, ions, or shockers when using all 4 of these tanks! We maintain all of our guns very well, and I myself own 2 spyders and an ion...and none have this problem. Also, co2 gives NO problems

Here is what we have all tried on all 3 different a-5's:

1) Velocity screw all the way out - No improvement
2) Clean and oiled (with light weight oil) - No improvement
3) Polished internals - 1 gun had an avg increase of 5fps. The other 2 guns
    had an avg increase of 3fps.
4) Maddmann spring kit - Red spring - about 4-5 fps improvement for all 3   
    guns
5) Trinity Spring Kit - hard spring - same as maddmann results
6) Different HPA tanks - No improvement
7) Adjusting output pressure b/t 700 and 900 psi - No improvement
8) BB in the end cap - No improvement

Basically, we have tried most everything that a normal person would have tried. And we cannot surpass an avg of 250fps on all 3 guns 

What else can i try? Has anyone run into this problem and found a solution that does NOT involve a Low Pressure Kit (which is very expensive) ???

Any help would be greatly appreciated.  

Edited by ykwak - 22 May 2006 at 11:27am

I think at this point you should give Tippmann a call and explain to them as you did here and then be specific on what you want them to do, for example the marker should be able to be adjusted to 325fps.For my two cents I think the valve spring needs to be replaced.

you have tried all other options , The only one left is the valve, and or  spring , and I actually think its to strong (for AIR), A weaker spring will stay open longer, milliseconds but still longer, as we warm up (85-90deg in FL) Co2 has more energy than HPA that is gas coming out of the tank.

I was think just a replacement from Tippmann , Springs are made by the "boat load" and maybe you have one out of tolerance.

it sounds like you have a valve spring from a low psi kit, If you bought the marker used the previos owner may have had a lp kit on the gun then converted back and forgot to change the valve

I have the same problem in my A-5 and I have done the exact same fixes that you had done.  Nothing I have found will get this gun over 250.

 has anyone ever taken apart their cyclone feed system on their a5 to clean it? i took the bottom cover off of it and a little metal pin, bent at both ends came out... tippmannparts.com calls it the "feeder ratchet spring", but i have no idea where to put it back in..

 

i really wanna get it back together to play this coming weekend, any thoughts?