Benjamin NP Trail - Mod Kit?



Author Topic: Benjamin NP Trail - Mod Kit?  (Read 19072 times)

Offline gene_sc

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Benjamin NP Trail - Mod Kit?
« on: September 30, 2010, 07:24:20 PM »
Ok guys who own the Benjamin NP Trail gas ram Air Rifles..... I am thinking of putting together a kit to upgrade the durability and longevity of the NP Trail.  And depending on my R&D this may also be applied to the Crosman Titan.

As most of you know I bought a Benjamin NP Trail  early this year and did a complete tear down and mod to the piston, and ram. The issue was that when most of them are new they cock like butter but once the everything loosens up the ram starts to rub and scrape on one side of the inner piston. Also the ram shaft is not centered at front of piston securely. Crosman has taken the standard springer pistons from other springer production models and merely drilled a small dimple inside front of piston for the ram shaft to sit. It is a shallow dimple.

I was thinking of making a mod kit that will address these issues and keep your NP's with a smooth cocking and shooting cycle. It also addresses the longevity of the ram itself.

Shadow has been putting my moded original Benjamin NP Trail to the test since he took her home with him.

So my question is:  Would there be any one interested in such a mod kit?

Gene
THE ONES I SLEEP WITH:   HW-97K,  Crosman Kantana, CZ-200, Webley/Scott UK Tomahawk, Benji Marauder, Benji Discovery,  Remington NPSS .177, Crosman Venom, Crosman RamQuest, Gamo 440, Gamo S1K, Gamo CFX Synthetic, Gamo CFX Royal,  RWS 24

Offline Rico14

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Re: Benjamin NP Trail - Mod Kit?
« Reply #1 on: September 30, 2010, 08:17:26 PM »
I have a couple of questions. Would this be a DIY? How much would you charge for the mod?

Offline gene_sc

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Re: Benjamin NP Trail - Mod Kit?
« Reply #2 on: September 30, 2010, 09:17:24 PM »
Yes it would be a do it yourself mod. Cost has not been determined yet but I would guess it would be under $30.00. Depends on cost of materials and shipping.
THE ONES I SLEEP WITH:   HW-97K,  Crosman Kantana, CZ-200, Webley/Scott UK Tomahawk, Benji Marauder, Benji Discovery,  Remington NPSS .177, Crosman Venom, Crosman RamQuest, Gamo 440, Gamo S1K, Gamo CFX Synthetic, Gamo CFX Royal,  RWS 24

Online Nomadic Pirate

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Re: Benjamin NP Trail - Mod Kit?
« Reply #3 on: September 30, 2010, 09:51:11 PM »
I'm in for 2 of them, getting a .25 soon  ;D
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Offline SciGuy

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Re: Benjamin NP Trail - Mod Kit?
« Reply #4 on: September 30, 2010, 10:10:28 PM »
For that price, I would be interested.
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Offline Tdubya

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Re: Benjamin NP Trail - Mod Kit?
« Reply #5 on: September 30, 2010, 11:32:29 PM »
I would definitely be interested too. Got the Titan also.
Terry W

Perry

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Re: Benjamin NP Trail - Mod Kit?
« Reply #6 on: October 01, 2010, 02:13:45 AM »
Count me in as well Gene.

yote300wsm

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Re: Benjamin NP Trail - Mod Kit?
« Reply #7 on: October 01, 2010, 05:17:57 AM »
10-4 on that!

Offline Logrusweaver

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Re: Benjamin NP Trail - Mod Kit?
« Reply #8 on: October 01, 2010, 05:23:46 PM »
I would be interested as well.  Mine doesn't seem to have any problems at the moment, but it is only a couple of months
in service so far.  I would also like a book or manual about servicing and upgrading for the Trail NP.  Is it possible to
put a more powerful gas ram in it for increased velocity and fpe, or is it something more complicated than that?
I have some predator "Big-Boy" pointed in 26.2 grain, and would like to be able to shoot those with a bit more 'smack'
at longer distances.
Maybe a kit to do complete tear-down and servicing as well?
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Offline shadow

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Re: Benjamin NP Trail - Mod Kit?
« Reply #9 on: October 01, 2010, 06:12:15 PM »
The Mod Kit that brother Gene speaks of would be a super upgrade to the Benji Gas ram's. I own one of his tune kit Benji's and you may not notice it when shooting your Benji gas ram but that gas ram is rubbing in there on the ram cylinder. We had my NP apart and could clearly see where it had been rubbing and any kind of action like that from a ram can rob your shooter of possibly more power and a smoother firing cycle. If one thinks that the ram is keeping itself centered in the piston it's not and Genes kit will fix the problem. Ed
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Offline Rico14

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Re: Benjamin NP Trail - Mod Kit?
« Reply #10 on: October 01, 2010, 06:19:11 PM »
I'm interested

Dary

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Re: Benjamin NP Trail - Mod Kit?
« Reply #11 on: October 01, 2010, 06:22:26 PM »
I'm in.

Offline High Noon

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Re: Benjamin NP Trail - Mod Kit?
« Reply #12 on: October 01, 2010, 07:03:51 PM »
I'm in if the price is right.

Offline Jman

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Re: Benjamin NP Trail - Mod Kit?
« Reply #13 on: October 01, 2010, 07:09:19 PM »
I can hear a squek in my trail when  I break the barrel, is that what your talking about shadow?

yote300wsm

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Re: Benjamin NP Trail - Mod Kit?
« Reply #14 on: October 01, 2010, 08:23:27 PM »
gene, you have a new mission in life. And another reason for the wife to ask "What are you doing now?"

Offline daveshoot

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Re: Benjamin NP Trail - Mod Kit?
« Reply #15 on: October 01, 2010, 08:25:27 PM »
Gene, would this be applicable/necessary in the Remington NPSS series?
Owner/operator of several air guns.

Offline Joshua A.

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Re: Benjamin NP Trail - Mod Kit?
« Reply #16 on: October 01, 2010, 08:38:51 PM »
i can hear mine rubbing when i break the barrel and cock it. it just started a few weeks ago. after about 2000-3000 rounds. Do you really think that this mod kit would potentially add much more power? I guess it would make sense. I wonder just how much power we are talking...and would there be a kit that is compatible for the XL models as well? or is it the same kit? Either way, I'M IN. especially for that price. You guys should run a test on a regular trail NP, and an XL, before and after the kit is installed, to SHOW the gains in both accuracy and power. Not that I don't think it would make a difference, because I really think that it certainly would, but It would most definetly help the kit to be a MUST HAVE. just a thought...Very innovative though. It's people like you that make this sport/hobby as exciting as it is!
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Offline shadow

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Re: Benjamin NP Trail - Mod Kit?
« Reply #17 on: October 01, 2010, 09:03:30 PM »
It's more about a smooth transition during the cocking and firing stroke then gaining a bunch more power. The kit removes the slop around the ram so to speak it can perform smoother without binding against the ID of the piston you get drag you loose power. Ed
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Offline Rico14

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Re: Benjamin NP Trail - Mod Kit?
« Reply #18 on: October 01, 2010, 09:11:06 PM »
would installation be available to those who choose not to do it themselves?

Nightstalker

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Re: Benjamin NP Trail - Mod Kit?
« Reply #19 on: October 01, 2010, 09:33:19 PM »
Great Gene,,if this will fit my XL 1100 I'm in for one 100% and Thanks!

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