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Old 11-27-2011, 10:47 AM   #11 (permalink)
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Originally Posted by -=ArchAngel=- View Post
tuned down to ~275fps, i bet this thing could easily get ~50 shots.
Hammer bounce could spoil any hopes of that.
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THE-SHOOTIST Anyone chubbin' like me for this?
mailmanmike Since Monday! That's more than 4 hours though, so according to those cialis ads I should see my doctor.
tlane77 I think for a non-chemical chubby it's 6 hours before its time to see a doctor. So you should be good for another couple hours.
splattttttt I wasn't goin to google "chubbin" because I assumed it had to do with fat. The lard type, not the fun stuff. But what ever feelings Jeff's experiencing, then they must be of the fun like stuff...
tlane77 He's got a woody for your woods.
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Old 11-27-2011, 12:05 PM   #12 (permalink)
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Originally Posted by splattttttt View Post
Hammer bounce could spoil any hopes of that.
But r-lad is showing some shots well below that (275). Larger seat diameter is a big advantage for hammer bounce when you get away from the stock valve.

You know, I used to look at the ASA and hose on the high pressure side of a regulated setup and think there were a useful number of shots in there. As our operating pressure gets lower, the value of chasing that volume down goes down as well. For that pump with a bottom line 12g changer, a short piece of micro line might be just as well.

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Originally Posted by r-lad View Post
Power tube ID is 0.234".
I like it.^^^
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Old 11-27-2011, 01:19 PM   #13 (permalink)
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Originally Posted by r-lad View Post
Probably. Are you interested in stock replacement? That would be different than the one shown.
Yes, I am interested in the stock one. Would the heavier bolt effect the performance any? I know that the aluminum one on my Trracer is already wearing down, and the threads are stripped.
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Old 11-27-2011, 01:39 PM   #14 (permalink)
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It shouldn't. A heavier hammer would, but not a heavier bolt.
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Old 11-27-2011, 05:44 PM   #15 (permalink)
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Yes, I am interested in the stock one. Would the heavier bolt effect the performance any? I know that the aluminum one on my Trracer is already wearing down, and the threads are stripped.
Durability and weight will be the only noticeable changes unless you can auto-trigger 20bps . Are the velocity adjuster threads good? That part will be re-used. What is your idea of a fair price? I might make a few, but I need to order a tap first.
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Old 11-27-2011, 06:05 PM   #16 (permalink)
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Quote:
Originally Posted by r-lad View Post
Probably. Are you interested in stock replacement? That would be different than the one shown.
I will happily provide drawings of the stock bolt if it will help you make accurate and compatible stainless steel replacements.

I'll grab them on Monday and throw them up on my site.
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Old 11-27-2011, 09:02 PM   #17 (permalink)
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How much would you be willing to charge for the whole low pressure setup?
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Old 11-27-2011, 09:15 PM   #18 (permalink)
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Quote:
Originally Posted by r-lad View Post
It might be at 275 now. I only have mini gauges that I don't entirely trust. The one I normally test with looked like 300, but each tick mark is 50 PSI. The gauge pictured only goes to 300, and is not maxed out.


The parts are home made. Power tube ID is 0.234". The cupseal is a captured o-ring. My early revisions had no seals. The designs without seals work fine as long the power tube can remain perfectly straight. Unfortunately, the plastic Trracer frame allows flex, which can let the bolt push on the power tube from the side and cause leaking. With the o-ring design, slight misalignment is tolerated and there is no leaking.
The effective diameter at the seal head is also larger, giving more force to hold the valve shut and prevent venting.
First of all, by turning it down to 275, he means turning the velocity down, not the pressure.

Nice job with that powertube. That's one of the directions we've been looking at in the Leprechaun Nelson thread. Yours is pretty damn big, considering the Gold Standard lapco #6 Powertube is only .189" ID. Judging by the slight shoot-up at the end of the cartridge, it looks like you might even be operating slightly above the valve sweetspot.

Besides needing a new valve collar, are the internals otherwise drop-ins to the Trracer? Would they fit a stock gun if your bolt wasn't installed? What is the OD on the tube?
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Last edited by russc; 11-27-2011 at 09:28 PM.
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Old 11-28-2011, 09:32 AM   #19 (permalink)
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I will happily provide drawings of the stock bolt if it will help you make accurate and compatible stainless steel replacements.

I'll grab them on Monday and throw them up on my site.
Thanks, I'll double check the measurements I've taken.

Quote:
How much would you be willing to charge for the whole low pressure setup?
I'll have to do a little refinement first, as some of the parts in this design are a PITA to make. Also, I would want to look into anodizing for the air chamber before offering it as a kit.

Quote:
First of all, by turning it down to 275, he means turning the velocity down, not the pressure
OK, I misread that. I would have to do a little more testing before I comment on the sweet spot. The Stabilizer on this marker has some scratches inside and does some strange stuff sometimes. That is what I guessed the 315fps shot was from.
All the parts shown are needed. The OD of the stock power tube is just slightly larger than the ID of the new tube. The new bolt is needed to clear the power tube. The new air chamber has a larger ID to allow some room around the larger valve seat and it has more internal volume.
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