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Crosman Air Pistol Owners Forum

Crosman air pistol - General => Crosman air pistol - General discussion => Topic started by: Bud on February 25, 2015, 05:39:41 PM

Title: valve and piston mod
Post by: Bud on February 25, 2015, 05:39:41 PM
If I flat top my valve what do I have to do to make the piston compatable with the valve? I tried to find any info on the net, especially youtube but could only find articles on modifying the valve.
Title: Re: valve and piston mod
Post by: mudduck48 on February 25, 2015, 06:54:26 PM
PM Davio, here on the forum or on the GTA forum. Here is one of the set ups he sells.
http://www.ebay.com/itm/POWER-COMBO-FLAT-TOP-HP-VALVE-ADJ-PISTON-DONE-RIGHT-for-Crosman-1322-1377-2289-/291332305886?pt=LH_DefaultDomain_0&hash=item43d4c233de (http://www.ebay.com/itm/POWER-COMBO-FLAT-TOP-HP-VALVE-ADJ-PISTON-DONE-RIGHT-for-Crosman-1322-1377-2289-/291332305886?pt=LH_DefaultDomain_0&hash=item43d4c233de)
Title: Re: valve and piston mod
Post by: DBOdude on February 25, 2015, 07:58:05 PM
i like AC Customs because both of his use delrin so there's no metal to metal contact when pumping to possibly damage the inside of the pump tube .

http://www.ebay.com/sch/a.c.customparts/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p3686 (http://www.ebay.com/sch/a.c.customparts/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p3686)
Title: Re: valve and piston mod
Post by: Cwlongshot on February 25, 2015, 10:34:56 PM
Quote from: mudduck48 on February 25, 2015, 06:54:26 PM
PM Davio, here on the forum or on the GTA forum. Here is one of the set ups he sells.
http://www.ebay.com/itm/POWER-COMBO-FLAT-TOP-HP-VALVE-ADJ-PISTON-DONE-RIGHT-for-Crosman-1322-1377-2289-/291332305886?pt=LH_DefaultDomain_0&hash=item43d4c233de (http://www.ebay.com/itm/POWER-COMBO-FLAT-TOP-HP-VALVE-ADJ-PISTON-DONE-RIGHT-for-Crosman-1322-1377-2289-/291332305886?pt=LH_DefaultDomain_0&hash=item43d4c233de)

I have used these on two of my builds and I have a third on the bench for my 1389. Its good stuff!

CW
Title: Re: valve and piston mod
Post by: Gippeto on February 26, 2015, 06:16:54 AM
Quote from: Bud on February 25, 2015, 05:39:41 PM
If I flat top my valve what do I have to do to make the piston compatable with the valve? I tried to find any info on the net, especially youtube but could only find articles on modifying the valve.

You replace the plastic piston assembly with a higher quality one. Best ones are made from brass IMHO.

Of the current commercial offerings that I'm aware of, I like this one the best;

(http://www.airgunsmith.com/cros1377/pistonbr1.JPG)

http://www.airgunsmith.com/cros1377/cros1322-77.htm (http://www.airgunsmith.com/cros1377/cros1322-77.htm)

Al
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