Transfer port

[bgmcgee]

I have a couple of Davio's transfer ports coming so I'll report back on how they work. 

[breakfastchef]

I have a couple of Davio's transfer ports coming so I'll report back on how they work. 

I PM'ed Davio about what information he needs to make a TP for me to replace some poly tube in one of my builds. Seems it would be loads simpler to have one reliable part than trying to cut little bits of tubing accurately.

[bgmcgee]

I hear that Larry.  I did the same for a t/p for my 1320 build.  Can't seem to get a  good seal with the custom barrel and now it has a 1/4" riser added into the mix. The 2 I ordered are for stock guns so those shouldn't be a problem.

[akula8608]

Today I received the rest of the parts I was waiting on to complete my 2250 build so I was able to slap it all together and test out Davio's transfer port. Passes the tissue test with flying colors. It's like a sore dick. Can't beat it.

[Davio]

I'm glad to hear your port is all sealed up.  I am keeping track and paying attention to these somewhat. It SHOULD be one size fits all on the lengths.

I've had dozens of positive sealing reported, but I admit that two have had problems.  One had an extra screw into the valve pulling it off center of the tube and makes the valve to port distant wanting a tad more sleeve.  Another I am unsure of (cause) at the moment, but I offered up an idea (ONLY if it is not sealing for some reason) to leave the transfer gasket in at the valve, put the ss port into it, then place the sleeve over the tube, re-assemble and re-check the seal. That would add some sleeve length / sealing compression. 

When buttoned up, these should last forever and not mind removal and re-installation for other reasons. 

[akula8608]

I finally got the time to chrony the finished product. Started off with a custom shop 2400kt with .22 18" barrel. Mods include boss valve, pro-top, boss buddy transfer port, cothran bolt, PA, and roller trigger.
10 shot string co2'cart:
634
635
623
638
628
633
625
628
628
625
This was after installing stock hammer spring. Had disco hammer spring and was getting about 20 fps less and wasting a lot of gas. Got 9 shots out of the cart. With stock spring getting 20 good shots with more piwer. Go figure.

[ped]

bit late on this one but an over size tp only increase power in conjunction with other mods like increasing the valve volume and enlarging the port in the barrel
if the barrel port is std them a tp that has a bore greater than the port  won't give any benefit
davio's port's do look good and are much better than the original ones
ped