PDA

View Full Version : Low Pressure Gun Problem


bracer028
12-23-2006, 08:04 PM
ok...so i went low pressure. I have a trinity front block, a cp reg, barrel, ndz valve, and a acs bolt.

the problem is when i shoot, i can shoot the gun the first few shots are ok and then later the gun sputters and i can't recock as if it is out of air.

how do i fix this.

i'm running the gun at a weak valve spring and a strong main spring. When i turn up the psi, i shoot too hot and still sometimes i have recocking issues. How do i fix this?

Nenkitsune
12-23-2006, 08:07 PM
try a medium main. also what psi are you running

bracer028
12-23-2006, 08:07 PM
maybe around 250psi

shunut
12-23-2006, 08:08 PM
Unfortunately every gun is different and really you'll just have to play with it until you find the right combo of springs and pressure. Make sure everything is clean and well lubed. Make sure there is no damage to your striker or sear. You could also try a lighter striker, but I'm not sure if that would help that much.

bracer028
12-23-2006, 08:08 PM
i got it to shoot 283 with the heavy spring.

bracer028
12-23-2006, 08:09 PM
what happens when i change the valve spring?

like from light to heavy...does it take less air or something?

DRAGON
12-23-2006, 08:10 PM
Try a medium or lighter valve spring. You really need to try many different spring combinations and use the one that works with your marker best. Most find out that using a random combo that worked in someone elses marker is a total disaster in theirs. LP really isn't for the lazy -

shunut
12-23-2006, 08:13 PM
A light main spring will require less air pressure to push the striker back into the cocked position, however it goes forward and hits the valve pin with less force that a heavier spring. Finding the balance between your valve and main spring can be tricky but if you dial it in correct it could be very rewarding. Also remember that lower isn't always better. Just because you can get your marker down to 200-250 psi, doesn't mean that its good for your marker. You need to find a pressure where you get the best efficiency and your marker operates flawlessly.

bracer028
12-23-2006, 08:15 PM
cool thanks...

i just didn't have time to change valve springs. so many people were rushing me to the chrono.

DRAGON
12-23-2006, 08:16 PM
I've found that relatively 300psi holds a great balance in LP Spyder's -

Far as rushing you goes, go on a day that you're not playing then there's really no rush - ;)

MVS1
12-23-2006, 09:19 PM
Dragons spot on. Add a couple of drops of marker oil to your asa before you air up your marker then dry fire 4 or 5 times **without** your barrel on (don't want to coat the inside of your barrel with marker oil, trust me), this will lubricate your reg internals. You could be having a problem with your reg not operating smoothly which could effect recovery time. When you where firing where you firing in semi or auto? One last question are you using air or CO2?

bracer028
12-23-2006, 09:50 PM
hmmm...i didn't do that oiling trick yet.

i was firing air.

i just tested my gun with a heavy valve and the stock spring...it finally recocks at 400 psi

i was using semi auto, but was walking the trigger as fast as i can.

bracer028
12-23-2006, 09:54 PM
but the problem is now this...

how would i be able to lower the velocity at this set up?

Nenkitsune
12-23-2006, 10:55 PM
you'll have to chrono it first to see what the velocity is

bracer028
12-24-2006, 09:00 AM
do you low pressure guys have a chrono of your own?