Author Topic: Travis's Bulldog power valve (Read 2989 times))

tkerrigan · « **on:** May 25, 2018, 02:37:48 AM »

Travis of jeffersonstateairrifles has had my Bulldog for about the last 9 months working on a improved air valve and boy did he succeed. I'll get right to it. These speeds are with the spring loose in the housing. 126gr .356 BBT did 895 at 2500psi, 915 at 2700psi,
928 at 2900psi, 943 at 3000psi, 961 at 3225psi, 973 at 3400psi, 989 at 3500psi, 999 at 3800psi, 1012 at 4000psi. I don't recommend the higher pressures to anybody, use them at your own risk. I was searching for valve lock and didn't find any. Using a 180gr spitzer it did 814fps -265fpe at 3000psi and 875fps-306fpe at 4000psi, that was yesterday.
Today I turned the hammer spring all the way up. A 165gr did 879fps-283fpe at 3000psi, 948fps-329fpe at 4000psi. A 173gr swaged did 811fps-253fpe at 3000psi, 901fps-312fpe at 4000psi. And the 180gr from above did 908fps-330fpe at 4000psi. Travis says that the power can be raised even more with a stronger spring. I had already ported my gun before Travis got it and it was shooting 241fpe max. All that is in a thread "working on the bulldog" in this gate.
https://www.gatewaytoairguns.org/GTA/index.php?topic=107531.0
Regards, Tom

tkerrigan · « **Reply #1 on:** May 25, 2018, 02:51:20 AM »

I forgot, the spring is very easy to cock. It has about half the strength of the stock spring. Regards, Tom

Ironman482 · « **Reply #2 on:** May 26, 2018, 10:06:23 PM »

I don't see the valve on jsa,s web site .is it going to be available soon? Or was it a one off item

oldpro · « **Reply #3 on:** May 27, 2018, 11:06:26 PM »

We will have them available very soon.

T3PRanch · « **Reply #4 on:** May 27, 2018, 11:15:53 PM »

A definite MUST HAVE!

oldpro · « **Reply #5 on:** June 29, 2018, 02:04:10 PM »

Well we finnaly got them done and they will be available next week!!! Thanks for being patient!

T3PRanch · « **Reply #6 on:** June 29, 2018, 02:19:08 PM »

Just in time. I have 2 Bulldogs now and the newest is getting this valve!

Airgunhunter73 · « **Reply #7 on:** June 29, 2018, 02:34:01 PM »

Yes Sir I've got to get mine out and do some chrony tests with the ammo I have so I can see how much difference this valve will make I'm stoked.

YEMX · « **Reply #8 on:** June 29, 2018, 06:33:45 PM »

I don't even have a bulldog yet, but I'm getting a valve anyway!!!

tkerrigan · « **Reply #9 on:** June 29, 2018, 10:33:46 PM »

Mine went to over 330fpe by just maxing the hammer spring adjustment, and according to Travis will do more with a bit heavier hammer spring. I haven't explored that part yet! Regards, Tom

Wayne52 · « **Reply #10 on:** June 30, 2018, 12:34:12 AM »

I was under the impression that the max fill pressure on these guns is 3K

ChapoChoo · « **Reply #11 on:** June 30, 2018, 12:52:12 AM »

Quote from: Wayne52 on June 30, 2018, 12:34:12 AM

I was under the impression that the max fill pressure on these guns is 3K

It is. OP was looking to test for valve lock. And he put a disclaimer in.

DHunter · « **Reply #12 on:** June 30, 2018, 01:24:12 AM »

Do the higher velocities affect the accuracy any?

YEMX · « **Reply #13 on:** June 30, 2018, 09:03:50 AM »

Quote from: DHunter on June 30, 2018, 01:24:12 AM

Do the higher velocities affect the accuracy any?

I don't think most of these guys (myself included) are planning on shooting the pellets or any light weight ammo. So the higher velocities shouldn't be an issue...

oldpro · « **Reply #14 on:** July 02, 2018, 08:16:11 PM »

Valves in stock now.

Airgunhunter73 · « **Reply #15 on:** July 04, 2018, 10:10:39 AM »

Well fellows I got the bulldog out a shot several different boolits through it over the chrony so I can compare the difference of the stock valve with the new valve from Travis, I ordered my new valve last night so I'm looking forward to getting it in and see the power difference it'll make, Thanks to Tom for the thread on opening up the transfer port and to Travis for making us these valves.

YEMX · « **Reply #16 on:** July 04, 2018, 12:48:44 PM »

This may be a stupid question, but I like to verify things...

I know you specified a .30" barrel port on your page, but I could open up the barrel port more for more power, right?

oldpro · « **Reply #17 on:** July 04, 2018, 01:36:18 PM »

Quote from: YEMX on July 04, 2018, 12:48:44 PM

This may be a stupid question, but I like to verify things...

I know you specified a .30" barrel port on your page, but I could open up the barrel port more for more power, right?

YES but if you shoot pellets the head will dip into TP hole thats why we specified .30 Now if you only shoot slugs go for it.

oldpro · « **Reply #18 on:** July 04, 2018, 01:36:52 PM »

In honor of our Countrys Birthday we are having a 1day sale 10% off everything and free shipping. Once again this is for today only. On checkout put this code in freedomaintfree.
Modify message

YEMX · « **Reply #19 on:** July 04, 2018, 03:43:44 PM »

Quote from: oldpro on July 04, 2018, 01:36:18 PM

Quote from: YEMX on July 04, 2018, 12:48:44 PM
This may be a stupid question, but I like to verify things...

I know you specified a .30" barrel port on your page, but I could open up the barrel port more for more power, right?
YES but if you shoot pellets the head will dip into TP hole thats why we specified .30 Now if you only shoot slugs go for it.

Yep, only slugs for me. I'll have a separate gun for pellets only. I just wanted to make sure! Thanks again!!

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Travis's Bulldog power valve

Author Topic: Travis's Bulldog power valve (Read 2989 times))