Where to find bobbed valves

[Joeycakes69]

I’ve been looking all over for a bobbed valve for my phantom but still no luck. Do any of y’all fine gents have a lead on where to acquire one of these bad boys? Bonus points if it has a gauge mounted on it. Also, if it’s impossible to find nowadays I do have a good friend that is very skilled with his lathe and other heavy machinery, just wondering what the steps would be for him to modify one for me? Thanks for any responses, you guys are the best!

[Chuck E Ducky]

The gage just plugs the hole in the valve created when you chop the back off.

it would be easy in a lathe. But keep in mind there are some down sides to lowering the volume on the back side of the cup seal. Adding a gage may give you a tiny bit back vs plugging it with a grub screw. You can take too much off it. So I would not go to crazy with it. Might need heavy springs as well to reach velocity Im not a fan of bobbed valves. The only one I found works well are Carters because they are larger diameter and Dukie DSP valves.

Thats also a revolution you posted it’s a completely different valve system vs the Phantom valve body.

You can take some meat off the back of a Phantom valve without affecting internal volume but not as much as the Revolution valve you have pictured.

[iamthelazerviking]

Bobbed valves weren't something that were ever sold, but a modification

[Chuck E Ducky]

I remember people offering it as a service back in the day. you see them on some older custom phantoms. But it takes a lot of work to get them balanced out right again. Even then it’s a massive trade off.

Just ask Xtreme how making the hose less valve body volume to small worked out for them. Red Springs, valve choke over 75* the thing barely hits velocity.

I got my 2.0 valve body to almost normal on silver springs by drilling the valve body out larger. It’s still not better than the stock valve. I actually want to remove more material by leaving the sprig seat and hogging more material out of the inside of the valve body. See if I can get the gas in grip valve more like the stock valve.

You can machine them up but I wouldn’t mess with the internal volume on a Phantom. It works flawlessly on both HPA and C02/12g.

[JeepDVLZ45]

I didn’t think bobbing the valve affected the volume of the valve at all. Aren’t they just taking the extra metal off the back end to shorten it?

[Chuck E Ducky]

Depends on how much you shorten it. Cutting it back past the point the spring seat shortens the valve spring length or definitely increases the amount of valve spring pressure. It’s also going to reduce the volume of pressure. So it will need more hammer spring or a lighter/ shorter valve spring. It will 100% throw off the very fine balance and require custom springs and or tuning. Not that it can’t be done just that it will require Lots of trial and error to compensate for the loss in volume.

[NONOBLITUS]

100 percent agree with Chuck E Ducky on all points

[JeepDVLZ45]

So…regardless if it’s a good or bad idea (I like the look of a bobbed phantom myself) SSC offers it as a service.

https://stanchy.com/pages/custom-machining

That said, I had a pretty bad experience with him
a few years back so I won’t have it done, but I’ve heard it’s a non-issue nowadays.

[Joeycakes69]

Yeah I just grabbed a random photo of what looked like a bobbed valve but I couldn’t see it too well since I’m on my iPhone mini. I used to run one way back in the day and I really liked it. I could get between 40-45 shots off a single 12g. I wasn’t planning on going crazy short with it but hopefully take enough off to squeeze another 5-10 shots per 12g. When I play with my phantom I never use the autotrigger so I’m not too worried about drop off. I’ve got an extra valve body lying around as well so I’m not too worried about messing it up. I think I’m gonna go ahead and see if my buddy can make it work. Thanks for all the replies!

[Chuck E Ducky]

If you shorten it you will need to make the inside wider to compensate. Otherwise it will do the exact opposite of what you want,