Tuning RAW HM1000X and Huma 1174 adjustable regulator problems

[BK_SouthBay]

RAW owners, need some help with my Huma adjustable regulator (Huma 1174) factory set to 143 BAR. Installed it and Huma gauge screwed into block read 106 BAR. Removed air bottle, turned adjustment screw (see corner picture and red arrow with #1) counter clockwise ½ turn. Screw bottle back on, 96 BAR. One more ½ turn and gauge reads 91.6 BAR, gauge on gun says bottle pressure 150 BAR.

One full counter-clockwise turn should have raised the pressure by approximately 40 BAR.

Is there a tool that makes removing and screwing in the brass adapter into the regulator? (see upper left picture marked with black circle #2).

 

[SpiralGroove]

Turn the Reg. screw in clockwise to increase pressure.
From the pic this screw appears slotted?

Some screws are pin screws and require pliers or a piece of small OD pipe to have two pins ground to turn the screw.

I have made such a (pipe) pin tool for my regular RAW regulators.

 

[XSUltimate]

2 small drill bits, put the shank of 2 drills into the holes and hold the 2 drill bits with thumb and forefinger. Works pretty good
P.S. The make narrow tipped snap ring pliers specifically for that purpose if you can determine what size and length you need.
Thx
Dan

 

[Motorhead]

CW rotation lowers the seat and will yield a LOWER output pressure.
CCW rotation Raises the seat & will yield a HIGHER output pressure.

The brass disk I simple use a small pair of needle nose pliers. Once bottomed out it only needs to be lightly tightened.

Now said .... I would be VERY SUSPECT that bottle pressure is lower than you think ( Bad / incorrect gauge reading )

 

[BK_SouthBay]

Those that said the bottle pressure was lower than being read are correct. I tethered the the rifle with the bottle installed to fill it and the Huma gauge screwed into the action block read 175 BAR. On the Huma adjustable regulator (1174) you turn the adjustment screw counter-clockwise to increase pressure. I full turn raised the pressure in the block from 143 BAR to 175 BAR.

Do they make replacement air gauges for the RAW HM1000x that are more accurate?

 

[Ranchibi]

Those that said the bottle pressure was lower than being read are correct. I tethered the the rifle with the bottle installed to fill it and the Huma gauge screwed into the action block read 175 BAR. On the Huma adjustable regulator (1174) you turn the adjustment screw counter-clockwise to increase pressure. I full turn raised the pressure in the block from 143 BAR to 175 BAR.

Do they make replacement air gauges for the RAW HM1000x that are more accurate?

View attachment 405549

I tried 3 different gauges one different brand...all were off a tad. These small 23mm gauges are just not accurate unless you get lucky....

 

[BK_SouthBay]

Those of you that said check the tank were right. Assumed removing the bottle a few times would not drop the air pressure that much. Seems the on gun air gauge is off by 40 or 50 BAR. Why doesn't someone make an accurate 23mm gauge?

 

[Ranchibi]

Shouldn't make a difference in fps spread as both ways are shooting regulated air pressures.

 

[emack1984]

I tried 3 different gauges one different brand...all were off a tad. These small 23mm gauges are just not accurate unless you get lucky....

Whats the thread size on the hm1000x gauge? I wat to put a digital gauge on mine.

 

[Ranchibi]

Whats the thread size on the hm1000x gauge? I wat to put a digital gauge on mine.

I think it's the standard 1/8 bsppI believe. Same as most guns. Sekmet makes a 25mm gauge that will fit....going to get one soon.

 

[emack1984]

I think it's the standard 1/8 bpt I believe. Same as most guns. Sekmet makes a 25mm gauge that will fit....going to get one soon.

Cool, I'm gonna order it now, hopefully those are the right threads, i will let you know.

 

[Ranchibi]

Cool, I'm gonna order it now, hopefully those are the right threads, i will let you know.

Please do let us know!

 

[emack1984]

Please do let us know!

I have one more question about the huma regulator, not sure if you are familiar with it but I'm wondering if you have to remove it from the action to adjust it up or down like you have to for the stock regulator. And does it add any extra volume to the plenum?

 

[Ranchibi]

I have one more question about the huma regulator, not sure if you are familiar with it but I'm wondering if you have to remove it from the action to adjust it up or down like you have to for the stock regulator. And does it add any extra volume to the plenum?

I am not familiar with the Huma reg as Motorhead said the OEM one is a better reg but the Huma is smaller and gives it more plenum space. I think the Huma is adjustable without having to remove it as you said but not positive. You could PM Motorhead and ask him to make sure!

 

[BK_SouthBay]

I don't know why some think the HUMA regulator is not as good. I have had it installed and it hold a constant pressure even after weeks of non-use. It is adjustable without having to remove the regulator from the action, something the OEM does and makes tuning the air pressure a real hassle.

 

[woogie_man]

What makes the Huma regulator easier to adjust. Trying to find pictures to find out, but my goolefu sucks today

 

[Cloud9AG]

I think it's the standard 1/8 bpt I believe. Same as most guns. Sekmet makes a 25mm gauge that will fit....going to get one soon.

Gauge threads on RAW are 1/8 BSPP (British Standard Parallel Pipe), not BSPT (British Standard Pipe Taper). Do not screw a tapered pipe thread into it or it will leak.

 

[terry mc]

What makes the Huma regulator easier to adjust. Trying to find pictures to find out, but my goolefu sucks today

Woogie,
The HUMA as soon as you pull the bottle you can reach the adjustment screw for the regulator without removing anything else.
The .30 cal and the .22 call HMX that I just had resealed both upgraded to the HUMA.
Also my tuner said they are easier to work on than the factory one. Since I do not work on regulators I take his word on it.

 

[woogie_man]

As much as I don't want to screw with Martin's work, I feel with the added plenum size I could up the pressure.

 

[BK_SouthBay]

Why don't you confirm Martin's settings so you can always return to them. Depressurize the gun, insert a digital pressure gauge into the action and pressurize the gun and fire three or four empty rounds to stabilize the pressure and note it. Then with the action if the stock unscrew the hammer spring adjuster back out until it stops against the stock and note the hammer spring settings.