Author Topic: Upgraded my 1366 Pest Gun (Read 3950 times))

Tack Driver 10 · « **on:** April 30, 2019, 10:39:24 AM »

Been using this 1366 gun for pest control for several years.
Super accurate and very quiet.
Has a 66 tube with a 4" stroke, Challenger barrel, PRod trigger and 766 pump link.
Upgraded with "Max Smoke" valve technology and new piston.

Challenger barrel, 7.9 CPHPs
05 pumps 557 FPS 05.44 FPE 0800 PSI
07 pumps 650 FPS 07.40 FPE 1100 PSI
10 pumps 736 FPS 09.50 FPE 1400 PSI
12 pumps 790 FPS 10.92 FPE 1600 PSI
15 pumps 855 FPS 12.80 FPE 1950 PSI
20 pumps 920 FPS 14.85 FPE 2500 PSI

9.57 H&N Barracuda Hunter Extreme
10 pumps 715 FPS 10.86 FPE 1400 PSI
12 pumps 748 FPS 11.90 FPE 1600 PSI
15 pumps 806 FPS 13.80 FPE 1950 PSI

35 shooter · « **Reply #1 on:** April 30, 2019, 02:57:22 PM »

You’ve got that one smoking!!
Very very nice.

rash_powder · « **Reply #2 on:** May 23, 2019, 05:05:59 PM »

Where did you find that 'max smoke' valve?

mav72 · « **Reply #3 on:** May 23, 2019, 07:00:42 PM »

That's some good stuff.

Tack Driver 10 · « **Reply #4 on:** May 23, 2019, 08:13:39 PM »

Quote from: rash_powder on May 23, 2019, 05:05:59 PM

Where did you find that 'max smoke' valve?

I made the valve and piston.
It was an off-shoot of the balanced valve Bob Sterne started.
Basically the balanced valve body minus the BV internals.

Made two balanced valves for a 760 and 1377 seen here:

760:
https://www.gatewaytoairguns.org/GTA/index.php?topic=153447.0

1377:
https://www.gatewaytoairguns.org/GTA/index.php?topic=153687.0

Might make a balanced valve for the 760 SC.
Here's the concept diagram:

RickinAZ · « **Reply #5 on:** June 11, 2019, 11:21:52 AM »

Can anyone tell me about the stock on this pistol? Is it a Crosman stock or a custom design? If it’s a Crosman item does anyone have a part number?..........thanks.

Rick67 · « **Reply #6 on:** June 11, 2019, 12:46:47 PM »

Quote from: RickinAZ on June 11, 2019, 11:21:52 AM

Can anyone tell me about the stock on this pistol? Is it a Crosman stock or a custom design? If it’s a Crosman item does anyone have a part number?..........thanks.

He made it himself like he did his valves

RickinAZ · « **Reply #7 on:** June 13, 2019, 03:19:51 PM »

Thx Rick67

Tack Driver 10 · « **Reply #8 on:** August 13, 2019, 07:17:05 PM »

So after my recent foray with two Benjamin 317s, it was time to focus my attention on my Crosman 1366.

I upgraded the valve and piston earlier but there's a few more areas that need attention.
When I built this gun 4 years ago I used a 5" stroke 2100 pump arm on a 4" stroke 66 pump tube.
It worked but the geometry was off so time to get it right before squirrel season.

The 2100 pump link is 2.67" from the main pivot to the link pivot.
I took a 766 pump link and relocated the link pivot to 2.20" from the main pivot.
The difference is .470", or .030" shy of 1/2".
Then took a new 2100 tube and positioned the main pivot for a 10" wood pump arm.
A stock 66 has an 8.5" pump arm for comparison.

This will allow maximum leverage and should be fairly easy to pump even at high pressure.
The NOS 766 pump links are super sturdy and will last a long time.

I have a riddle.
What do you get when you cross a pump shot gun, Benjamin 317 tootsie roll and a grenade?

answer: This Alpha Dog wood pump arm of course, mocked up with the new 2100 pump tube.
Painted black it will be nightmarishly scary........be afraid, be very afraid....LOL

mafatone · « **Reply #9 on:** August 13, 2019, 07:23:46 PM »

Way cool.

mav72 · « **Reply #10 on:** August 14, 2019, 08:07:29 PM »

Nice work! I like it!

Matchstickshooter · « **Reply #11 on:** August 14, 2019, 08:25:32 PM »

Always a treat,(and feast for the eyes) to see what you come up with next! Awesome!

CraigH · « **Reply #12 on:** August 14, 2019, 08:26:25 PM »

Very nice carbine!

bantam5s · « **Reply #13 on:** August 15, 2019, 01:21:44 AM »

The rest of the gun is not my style, but I certainly like the new forearm for sure.

Tack Driver 10 · « **Reply #14 on:** August 15, 2019, 08:30:27 AM »

Stained the forearm ebony and will get it painted with bed liner later today.
Drilled a counter bore to accept a plug in poly bumper.
Have a few more items to finish but should get it together over the weekend.

antithesis · « **Reply #15 on:** August 15, 2019, 01:53:59 PM »

That is one sexy lil freak of a pumper man...Craig linked me over here, and now I got a question...I can't quite tell but how is that thimble secured in the valve body in the balanced diagrams?

I am working on an easy cracking valve for my 392, and want to do a spool valve, chamber at ATM pressure. Given my limited tooling, venting via stem isn't an option. So I figured perhaps using vented screws to secure the thimble to vent to the dead space between valve wall and tube would be viable. Have you ever tried anything of the sort?

Tack Driver 10 · « **Reply #16 on:** August 15, 2019, 10:20:25 PM »

The thimble floats in the valve body.
Allow a few thousands vertically and horizontally so the thimble can self align.
It's held in by the valve body sections.

The 392 can really use some performance mods, especially in the valve.
I modded a 392 valve awhile ago.
https://www.gatewaytoairguns.org/GTA/index.php?topic=161042.msg155793139#msg155793139

Not tried the vented screw approach but good luck and a have fun.

Tack Driver 10 · « **Reply #17 on:** August 16, 2019, 05:44:08 PM »

Made a new brass barrel band and got the players together for a photo op.

YEMX · « **Reply #18 on:** August 17, 2019, 11:09:30 AM »

Very nice!! I'd like to do something similar soon!!

antithesis · « **Reply #19 on:** August 17, 2019, 12:07:13 PM »

God I need to save for a lathe😒

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Upgraded my 1366 Pest Gun

Author Topic: Upgraded my 1366 Pest Gun (Read 3950 times))