[J. Thompson #5150]

So, I was having some serious drop off issues last week, and of course I changed the battery, cleaned and lubed the ram, you know, basic stuff. But get this, I had to drop my HPR way down, now I'm dead on at 90psi on the HPR as well as the LPR, dead on at 270fps, no drop off. I thought my gauge was broken so after I got home I hooked up a digital gauge, and it too showed the same results. I've never seen an Imp run at that low of a pressure, especially with such a low dwell. I'm not complaining at all, but this can't be normal.

[lamorte]

have heard people running their LPR at around 60psi before. i suppose you'd need a good 300psi or so HPR running pressure to do so.

all sounds good but don't do too much braggin. the tech gnome comes along and wrecks everything while you're sleeping.

[ikey]

lpr yeah but 90 in the valve is crazy low. wow. that kinda amazes me. we are talking old pre 09 pulse right?

are you still getting good efficiency? acceptable? i mean all common sense says you should be compared to a higher pressure lpr setup.

only thing i can possibly thing of assuming battery and everything was right is that your lpr setup was to low or your hpr was too high, and at a fast rof you didnt have the force to continually open the valve...for reasons such as a bad recharging tank or something. i dunno. if your settings were right on teh threshold and an outside factor like that came into play it could have caused it. or perhaps instead of teh tank, your reg is not recharging well?

of course im assuming your gun has no FSDO

WAIT. your running an evil valve? thats a high pressure valve?!?! that further confirms my statement. the whole setup might need to be higher pressures than standard. BUT how are your running an evil valve at 90 psi to get 270? what?

i dont have a lot of experience with evil parts cause i dont like them. but im rn th evil valve in the higher threshold of imp pressures (around 200) and try upping the lpr over 100 (i would say over 160 and its just not worth it unless your really shooting for great shot count).

but hey if your getting good performance off 90 psi for some reason with no shootdown, wow. run it. your gun is an anomally.

(ALL tanks drop in pressure somewhat during fire, thats just gas flow. some worse than others depending on the tank).

[msonic]

my rat preferred 110 hpr. Every marker behaves differently and some can go that low.

[xsn0man]

What is your dwell?

[J. Thompson #5150]

Dwell is and has been at 7ms. The valve, yes, it's an Evil valve, but I've opened up the outlet; the port is now just slightly larger than that of the stock valve. The inside of the valve is also a bit bigger as a result, so it folws really well. The LPR has been at 90psi for some time now. It cycles down to 70 but I get a lot of drop off; 90psi seems to be just about perfect. I get no appreciable shootdown, maybe a few FPS, but nothing noticeable. There's also no FSDO. Actually, I was getting FSDO until I cleaned the ram and swapped the battery, and it wasn't until then that I actually had to drop the input pressure. I haven't gotten to run a full 4.5K fill through it yet, but like I said, I went through about a case and only filled the 68/3K once.

I'm not braggin, really, but this baffles me just as much as it does you guys.

[ikey]

dude. theres no gun in existance than does 2k shots off a 68/3000.

but i am interested to see your shot numbers.

also, running your lpr and hr the same pressure really is pointless. i mean, the point of an lpr is that the hpr can be high while having independant control to LOWER ram pressure. so if your running it the same, you might as well take it off. same performance, les parts.

i mean as long as your lpr pressure is low, rasing hpr (valve)pressure really shouldnt effect how the gun feels or shoots assuming you can keep your lpr relatively low.

i have a hard time beliving shot count is as good as it could be, just given how standard way of paintball guns are i would say raising hpr should be better? i mean thats standard logic, then again your gun seems strange.

but you say if you raise your hpr, you have drop off?

[msonic]

He said he refilled only once... which means...

1k shots per 68/3000... at most...

[Slow_Target]

When you said that you checked your pressure with a digital gauge, how did you check the hpr. Obviously the lpr can be checked at the back of the solenoid tube. I ask because every Imp that I have worked on that supposedly ran at ridiculously low pressure was found to have a bad gauge. Some were a little and some were WAY off. When checked against calibrated gauges from my work, some were off 50-60psi. These small 90º sweep gauges are terribly inaccurate.

[J. Thompson #5150]

Originally Posted by ikey

dude. theres no gun in existance than does 2k shots off a 68/3000.

but i am interested to see your shot numbers.

also, running your lpr and hr the same pressure really is pointless. i mean, the point of an lpr is that the hpr can be high while having independant control to LOWER ram pressure. so if your running it the same, you might as well take it off. same performance, les parts.

i mean as long as your lpr pressure is low, rasing hpr (valve)pressure really shouldnt effect how the gun feels or shoots assuming you can keep your lpr relatively low.

i have a hard time beliving shot count is as good as it could be, just given how standard way of paintball guns are i would say raising hpr should be better? i mean thats standard logic, then again your gun seems strange.

but you say if you raise your hpr, you have drop off?

Ikey, I never said I got 2K shots off a 68/3K fill. You may wish to re-read my prior statements. As far as the LPR/HPR pressure, please, don't misunderstand what I'm saying and try not to insult my intelligence. I'm well aware of what the purpose of an LPR is. As I said before, I was running at a higher HPR pressure until this little occurance. I also purchased the Impulse with an LPR installed on it to begin with so simply taking it off isn't going to happen unless you'd like to send me a front cap.

Again I'll state that there isn't any shootdown. No FSDO. No problems. I'm not asking for help to solve an issue. I simply wanted to know if anyone else had a similar experience as it even baffles me.

Originally Posted by Slow_Target

When you said that you checked your pressure with a digital gauge, how did you check the hpr. Obviously the lpr can be checked at the back of the solenoid tube. I ask because every Imp that I have worked on that supposedly ran at ridiculously low pressure was found to have a bad gauge. Some were a little and some were WAY off. When checked against calibrated gauges from my work, some were off 50-60psi. These small 90º sweep gauges are terribly inaccurate.

I pulled the gauge off the ASA and got the pressure from there, just like I pulled my LPR gauge from the rear port. The digital gauge I used has a 1/8 NPT male fitting. The pressure from the gun's gauges were only off by about 5psi or so or I would have dismissed the whole thing entirely.

[ikey]

so i was running like a typical lpr setup and just out of the blue your gun started doing this?

weird.