Tuning RAW HM1000X a bit out of box loud thinking

[mubhaur]

I understand that RAW guns' block has three cavities. The lowest for the regulator, the middle one for the valve and the top one for barrel.

I feel that just after the threaded area of bottom cavity and middle cavity, the separation wall between these two cavities may be removed to enlarge the plenum area.

Since all air passed through the regulator ultimately enters into the middle cavity where valve sits, these is no use of any metal upto a certain distance.

We just need to ensure that there should be no issues in installing the regulator and valve and valve plug screw.

Rest of the metal between these two cavities may be removed to achieve more plenum space without the need of around 10cc external plenum.

I hope some seasoned tuners like Motorhead and others may opine.

I might be totally wrong in all this and may be missing some critical point which professional tuners may point out.

Regards,

Umair Bhaur

 

[corny]

I believe ppl have done this.
But you have to be very careful.

5axis cnc mill with lollipop cutter would be ideal.

 

[mubhaur]

I believe ppl have done this.
But you have to be very careful.

5axis cnc mill with lollipop cutter would be ideal.

If anyone chimes in and shares some details, I understand that my machinist can do it on manual laith machine.

He has skilled hands.

 

[elh0102]

Academically, could be interesting. Practically, sounds like the perfect solution to a nonexistent problem. But good luck with it.

 

[mubhaur]

Academically, could be interesting. Practically, sounds like the perfect solution to a nonexistent problem. But good luck with it.

Not to solve a problem but to increase the potential of the gun without installing external plenum that I otherwise use.

Thanks

 

[corny]

From what I’ve read…ppl did it by hand with dremel tools.
They also cleared out more in the front.

 

[mubhaur]

Here is Motorhead's response on another forum.

 

[corny]

What you could do is drill out and retap the bottom blanking plug to the same thread size as the regulator.

 

[mubhaur]

What you could do is drill out and retap the bottom blanking plug to the same thread size as the regulator.

I don't get you that how the enlarging of the hole of bottom blanking plug screw will increase the plenum area !

 

[corny]

U could drill it out all the way to the valve

 

[mubhaur]

U could drill it out all the way to the valve

Agreed but I still can't understand your previous comment.

 

[corny]

if you have a raw that was built before Airforce bought out the brand. Your regulator was thread 3/8 19 bpst. That meant your plenum was drilled to a diameter of .5938”

Once Airforce got the brand that changed that to 3/4 16
Making your plenum .689”

my proposal is…do the same with the blanking plug on the bottom. Obviously the action is strong enough.

 

[mubhaur]

if you have a raw that was built before Airforce bought out the brand. Your regulator was thread 3/8 19 bpst. That meant your plenum was drilled to a diameter of .5938”

Once Airforce got the brand that changed that to 3/4 16
Making your plenum .689”

my proposal is…do the same with the blanking plug on the bottom. Obviously the action is strong enough.

Since I am talking about the RAW HM1000X before takeover by Airforce, I understand that I can drill out the internal dia of reg cavity from .5938" to .689".

I can use a specific tool to remove the material just after the threads on block made for regulator. This will make possible to use the same regulator with same threads on the block and just after the threads, the dia of cavity will enlarge a bit.

To this extent I get your point.

But still making a bigger hole and bigger blanking screw at bottom doesn't help me understand that how will it enlarge the plenum area.

Apparently I feel that the block is sturdy enough that even removing the partition wall between reg cavity and valve cavity will not be risky but after reading comments of Motorhead, Scott I am a bit reluctant.

Bhaur

 

[mubhaur]

Did anyone measure the external dimensions of the block of pre and post airforce RAW guns?

I have heard that they have enlarged the action and now RAW HM1000X .25 is capable of producing 75ftlb while previously it could generate 62ftlb only.

If owners of new guns share the external dimensions of the block it may be helpful.

Regards,

 

[corny]

Externally the block is identical. I’ve rebuilt and repaired both older and newer blocks

Per the previous points…take a look at my crude drawing.
I’m saying both the regulator and blanking plug holes could be drilled to .689

 

[mubhaur]

Externally the block is identical. I’ve rebuilt and repaired both older and newer blocks

Per the previous points…take a look at my crude drawing.
I’m saying both the regulator and blanking plug holes could be drilled to .689

View attachment 300481

Now I get you.
Thank you for the drawing.

What do you think, if the additional ftlb in new guns are just because of .689" chamber or there are some other internal dimentional changes ?

From 62ftlb to 75 ftlb with same shot count is a big jump in power potential in new guns.

Regards,

 

[corny]

I believe so, yes.

I see no other difference.

 

[mubhaur]

I believe so, yes.

I see no other difference.

Thank you

 

[Sell682]

Externally they are different doesn’t one accommodate a larger magazine. Serial number HMX (newer) and those that are HM for HM1000x models.

 

[Airgunmann]

I believe pre airforce and airforce only difference was the larger regulator and regulator hole area I've read that Martin could drill out pre airforce and fit it with the larger regulator