Crosman 1377 Piston And Valve Mods




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miketheknife2: Thanks mellonair.com has the FT sets.

NotSoDumb: What isn't mentioned is that with a modified valve, one that has had the capacity increased and a lighter spring and using a high pressure piston, you can now pump the airgun many more times than the recommended 10 times. I've done a lot of the mods, including a longer probe pin and pumping my gun up to 25 times, which seems to be the sweet spot now. You'll find that you need to put more air in the valve to get the pressure up. Replacing the hammer spring and a longer bolt probe, which places the pellet further into the barrel, keeping the pellet skirt from being centered in the transfer port hole and a few other things like a better breach, you can make these pistols really sing. Some people say that the longer bolt probe actually slowed the pellet down. That might be true for some but for me, just using 12 pumps, I chrony tested a 7.9 gr. Crosman Premiere and saw a difference of an additional 20 feet per second. At 25 pumps, I'm seeing a bit over 700 fps this old 1377 American Classic with which is unbelievable with the stock barrel.

Marc Hills: A lucid, well-presented explanation of the 1377/1322 piston/valve operation, and exactly how the modifying them can increase performance. Nicely done and thank you.

Terry Watkins: I have a older model probably late seventies, only problem I have is the pin has a washer clipped on it so I can't just tap it out. Does anyone know how I should remove that, it's pretty heavy metal and it's hard to grip with pliers

w1bmw: Great explanation! I just picked one up today and really appreciate the lesson. I've got my stock, barrel, steel breech, etc on the way, but had no idea where to start on the innards. Thanks!

Aldo Rini: Hey Mike, thanks for the video. Where do you recommend to purchase the modified valve and piston? Want to mod my new 1322.

bomartin: thank you for your video, the information was great, 

TheVabene73: perfect video thanks but i want to ask you if the stock 1377 can kill a dove at 50+ meters with bodyshoot

Decklan Cox: When I pull back my bolt it won't stay back and it takes several shot to decompress. I think it is something to do with the hammer and hammer spring. Thank you

Aldo Rini: Hey Mike, great video..really enjoyed it. I have 1322 and wanted to add this modification. Where can you order this valve?

J Martin: What are your best results with modified {all out/anything goes } 1377 ?? 

Bob Bob: please turn our xxxxxx music off so we can hear you

Sierra Madreme: 4 years later,and your video is still helping people.Thanks for the how it works video..very easy to understand and well presented. Thank you again.

callofdutyguy9: Where did you get your FT piston and FT valve? And can you make a video of how to install everything

Daniel A: U sound like marky ramone

lige risner: what do you think about the high performance pump valve for crosman 1377&1322 that's for sale on ebay it is not flat top but is ported and has more room for air in side

lige risner: ebay is the best place to get up grades for all of crosman air guns if any one is still needing them

Airgun n00b: Your accent makes me miss the east coast

hardway106: Wicked cool video Mike..helped out alot with my 1377 Mods.. Thanks for showing us..

mark long: how big did you drill hole? 

MrEricdgreat: I like your video, I got one of the first gen 1377 and I hear air escaping out the barrel can you tell me how I can fix it does not hold any pressure ? and I also pulled the handle off and a very small spring fell out I have no idea where it goes can you help?

PopeMouse: Great video man! This really helped me out. :) i just have one question, what site or sites do you get your parts from?

miketheknife2: Yes sir your right just the barrel and bolt prob are different.

BeastieG13: thanx Mike !

Kel-chan: cant you just file and sand down the piston to get a flat top? what happens if you use the stock plunger with this flat top?

miketheknife2: @AndyAbez lol

Psycho12345123: @miketheknife2 yeah the farthest i shoot at the moment is only 10-15 yards

F13rce187: @miketheknife2 so if I bore the valve will it increase the fps or get a flat top piston

SpiderMack: im installing ft piston n valve do i need to add 2 drop pelletgunoil down the hole of the valve? i just want make sure thats correct is it? thnx

kingfish4488: I have an old style 1377 are they any mods. worth installing on it? It needs to be rebuilt its not holding pressure,also who is a good parts seller. Thanks Rob

macabespeed: Could you maybe do the old JB weld flat top piston? Grind the stock valve flush and maybe fill the center of the piston with epoxy? obviosly youd have to machine and polish the jb, but what are your thoughts? did this type of mod (epoxy) to a beeman p17 and it REALLY worked well....

miketheknife2: I wouldn't do it that way the epoxy could break up and damage your gun.

miketheknife2: @0akie13 Thanks and your welcome I have fun making them.

Psycho12345123: @miketheknife2 can you make a vid on how to drill the hole out and make the fps higher?

thatbme35: hes not that rude for dealing with dumb freaks day end day out. yes hes short with folks but i got a great 18in. 22cal. barrel frome him for cheap.i ordered my flat top piston valve set from airgunsmith dotcom they sell a great set.

GHOSTTOYS: ok but do a flat head get more air in or does it pump with less then 10 time , i personaly have moded my 1377 (canadian) by pluging the hole in the back and drill the valve exit and drill the jonction between the pump and the barrel it have alrady give me more speed and strength , can it get faster and stronger with the pump mod ?

Nate9595959595959595: @miketheknife2 where did you buy all the mods? like the pump and the barrel?

miketheknife2: Thanks man i'm glad you liked it.

miketheknife2: Mellon air . com

Patrice Beaulieu: My air started leaking after putting oil in it. I managed to temporary fix it by unscrewing a little bit the screw right before the trigger. The one that hold the bottom. If its too thigh aire starts leaking when I pump . Do you have any idea how to fix this ??

miketheknife2: The cone will keep them from touching but the flat top set up will touch each other.

Patryck Oliveira: Very nice videos guy!Congratulations from Brazil!

miketheknife2: @jonnytheninja2R You need to use emery cloth and smooth all of the sharp edges inside the tube.

Eadwine17: i installed the flat top valve but when I pump the gun there seems be air leaking out.. can anyone help me?

Victor Gonzalez: can a stock piston and valvle be modded to convert them in flat top? and you mention that i need to make the hole of the valvle a little bigger what drill bitt i must use?

GLC jonsan308: Do you know how to get the piston and valve in without cutting them in the tube?

miketheknife2: Mellon air . com

Nismogtir1: this is a vry informative video=)

MagnoliaX12: What are your thoughts about converting the compressed air cylinder to use compressed air from a hose? Basically remove the pump lever and run the hose down the barrel under the pump arm. Is there enough meet on the end of the cylinder to thread and attach an adapter? I have a Sheridan .397 that I want to do it too but not sure if it would work.

miketheknife2: @BlazyNonVevo It's very easy to take apart pretty much remove all the screws be careful of the rear cap it's under spring tension, and remove the pin that holds the pump arm in.
Rating:
Crosman 1377 piston and valve mods 4.9 out of 5

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Crosman 1377 piston and valve mods