Nitro problem.... efficiency

[Jeffo2448]

Ok, ok. I got a full 4500 fill at the local shop and I had a bag of 500 sitting around so I loaded up 3/4 of my hopper to have a little fun w/ my new RAT. Well, I shoot the hopper and man was it fast... .even though I broke like 4 balls because my tank wasn't screwed in all the way, lol and the gun depresserized. Well, after shooting, I look at teh gauge on my tank which was 4500 and now its almost below 3000! That is an insane amount of air lost to just shooting 3/4 of a hopper. There were no leaks, etc. Thanks for the much needed help!

[PjaY]

check your pressure/dwell, if your pressure is low then the dwell must stay open longer and release more air to achieve the same velocity, for best efficiency set your maxflo to 180psi (thats if you do not have a LPR)

[DasBaldDog]

Also realize that a 4500 fill usually only settles down to around 4100 or so.

[SpUnKy-BoLtOn]

Try running your maxxy at 180-190 psi, then turn your dwell down to about 7-10 clicks from the bottom. I run my dwell at 4 clicks from the bottom, but I have well balanced internals so i can achieve the same velocity.

[BlackDragunner]

He says right there that he DOES have an lpr... to set up a LPR for best effiecieny:

Set your Impulses operating pressure to 150psi.
Set the LPR at its maximum output pressure setting. This will be 150psi. We don't really care about the LPR's actual pressure. We are trying to do this the simple way.
With the operating pressure at 150psi, adjust your dwell to get the gun to shoot about 300fps. This will give you a very good dwell setting to use with the LPR.
Now set the operating pressure up to 200psi.
Shoot over a chrono, adjust the LPR to get the velocity you want, lets say 290fps for an example.
There you are done!

[Jeffo2448]

Should I do this... turn my dwell all the way down, then increase it until desired velocity? How many "clicks" should I go up after I go all the way down... like whats the normal ? And the LPR is a bit tough to turn at first, is that OK? And from BlacKDragun said, I should screw the LPR ******d? Thanks, and I'm brand new to the imp/dwells/electros so I'm kinda lost.

[SpUnKy-BoLtOn]

Ya, that would be a really good idea. Just take the dwell all the way down (you will know when this has happened because the imp will make a low pitched "beep beep beep"), then proceed to adjust it upwards until you get the right velocity. I just said 7-10 clicks as a rough estimate, cause thats what my nasty ran at before i got some new internals. Hope I helped.

[SpUnKy-BoLtOn]

O sorry to double post. I didnt see that u had an LPR. This changes everything then. Yes its normal to have your LPR really tough to turn (i still have to use one of those rubber jar openers to turn mine). Well, for one your maxxy should be running at like 240 i believe WITH AN LPR.

To set up an LPR, turn it all the way IN so that it is at its highest output pressure.

Next, keep turning the dwell up, and at some point you'll notice that turning up the dwell more will make no difference in velocity. Once you have reached this point, turn it down until you see the first drop in velocity. This is the right dwell setting.

Next, just turn the LPR ******d until you get around the 280-290 FPS range, and voila! your LPR is set up. O ya, and u will need a chrono to do this. But, i cant imagine why EPBO wouldnt have set it up correctly for you. O well.

[BlackDragunner]

spunky, thanks for elaborating on what I posted... I was in a hurry and just snatched it off wolvies site, so it might not be very easy to understand...

[Jeffo2448]

Oh man! Thanks for the step by step instructions! Anyway, before I could read those instructions, I just tinkered w/ the dwell and LPR. What I did was, set the dwell all the way down until it beeped. Then I twisted the LPR ******d, and I put the dwell up about 10 clicks. The paint was probably shooting at 160 fps, so I turned the LPR in about halfway and the dwell up a couple times... then down again until I adjusted an estimate velocity (no chrono here). It seemed pretty good and I shot two hoppers of paint. The effiencency improved a little bit, but I'm going to do what you said later. Thanks again! Makes my life so easier! Woooo hooo. :D Also to add, my Max Flow was running at about 180, so I should turn it up to about 240 now I'm guessing.

[BlackDragunner]

I wouldnt turn it up quite that far man... the PRV will vent at that high... I recommend 200-230psi. Also check out Skog's site for a more detailed guide... I'll go search for it for you...

[Jeffo2448]

Thanks man. I feel like I'm lazy....:P

[SpUnKy-BoLtOn]

Ya, 240 might be pushin it a little bit. But, like blackdragunner said, 220-230 is optimal. I run mine at 240, and havent had any problems with it yet, but all imps are different as u may know. O ya, and I'm glad I could help!

P.S. No wonder ur efficiency was so bad, it was at 180 PSI! O ya, and heres skogs site http://www.geocities.com/theskog/

[BlackDragunner]

Yah i looked for it on here but I couldnt find it there so I searched and HERE IT IS:

ok: here is the best way to do it (longest):
Mount your LPR and connect everything up, gas up, turn on etc

Set the LPR to its highest pressure (on most LPR's this will be screwing the adjustment in)

set the max-flo to read 200psi (this won't hurt the solenoid-trust me)

Shoot over a chronograph and adjust the dwell of the gun, you are not trying to find a velocity, what you are trying to find is the point where the dwell makes no further difference in velocity. Shoot, and adjust for more dwell (turn counter clockwise on old boards-front adjuster on new boards)

At somw point you will find that adding more dwell does nothing to increase velocity.

now back off the dwell until you see the first drop in velocity.

This is the correct dwell setting

now adjust the LPR until you get your desired velocity (normally around 280-290fps)


EDIT: Courtesy of Skog

[BlackDragunner]

um also, i just reread your post and I was thinking maybe you lost some air by not having ur tank screwed all the way in?

[FalloutMan]

i wouldnt screw with your lpr i think fom sets them at the factory i was dumb enough to mess with mine and not reset it and it wasnt working.

[Jeffo2448]

Nope, it was because my pressure was 150-180 psi.

[Jeffo2448]

My LPR works fine when I try to adjust it now. I just adjusted the dwell and LPR and it works like a charm! The paint flies straight and it goes far.... very far... maybe too far. But I'm playing Friday so I can check it at the field chrono. Anyway, I noticed that if you even twist the LPR one knob and try to shoot it won't go anywhere, but as I adjust the dwell, it works perfectly! I love this gun!:love:

[PjaY]

my bad, i didn't read his sig with the LPR in it before i posted