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PostPosted: Thu Apr 23, 2015 11:02 pm 
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Location: sherwood park
I have a benji rifle, it is a pumper. it has this valve :

http://2.bp.blogspot.com/_aNjK3CTQ0DE/S ... 150927.jpg

I figure it can be tuned, if you do some rough guestimating,
just by looking at it, with multiple exhaust ports and a ring of open airspace, the actual exhaust port is waaay bigger than it needs to be, losing all that precious air pressure you worked so hard to pump.
so the idea is to fill it in. But besides lead, what would be a suitable material to use? And I know "but the port won't line up to the barrel..." I have that part covered.
any takers?


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PostPosted: Thu Apr 23, 2015 11:03 pm 
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Location: Okanagan,BC
Welcome back!

Long time no see.

Good to see you back on the forum.

:)


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PostPosted: Thu Apr 23, 2015 11:05 pm 
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Location: sherwood park
Thanks!! :D


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PostPosted: Thu Apr 23, 2015 11:53 pm 
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The only thing that comes to mind other then led is JB weld or something like it.

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PostPosted: Fri Apr 24, 2015 12:05 am 
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At first glance...looks to be an easy part to make....I vote brass. :)

Can you take it apart further and post pics?

Al


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PostPosted: Fri Apr 24, 2015 12:07 am 
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Location: sherwood park
I will put pics up tomorrow, are you capable of making one? I don't have the gear to do it.


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PostPosted: Fri Apr 24, 2015 12:52 am 
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If time permits, yes.

Valve body is not usually a big job, but pics will tell the story.

Al


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PostPosted: Fri Apr 24, 2015 9:23 am 
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So you want to make this body into something like......see next pic....

Image

like this.... well your going to have to make sure the exhaust hole lines perfectly with the air port.... :?

Image

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PostPosted: Fri Apr 24, 2015 11:42 am 
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Yes exactly that!! I realize lining it up might be a task and a half but I'm sure it can be done.


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PostPosted: Fri Apr 24, 2015 10:16 pm 
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Doesn't look any harder to make than this one....

Image


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PostPosted: Sat Apr 25, 2015 1:40 am 
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If only I had the tools... What are those For If I might ask?


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PostPosted: Sat Apr 25, 2015 9:05 am 
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Crosman 100

topic67234.html

Al


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PostPosted: Sun Apr 26, 2015 2:33 am 
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Location: Sidney, BC.
The early Benjamin v/v body had only 1 hole but had a locating nub to keep the exhaust port in line....KEN.


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PostPosted: Sun Apr 26, 2015 9:58 am 
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that's correct a tiny nub that sticks out on the side.... :wink:


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valve.jpg
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