The Powerhouse valve is legendary!! And will definitely amp up the power in a Marauder. 
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Powerhouse valve
- Thread starter Airgun-Revisions
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They work great in other formats as well!
Cothran/Stace build on the left w/Powerhouse valve, 18.1 @900 for a lot of shots
Cothran/Stace build on the left w/Powerhouse valve, 18.1 @900 for a lot of shots
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This one is for the marauder long gun. The powerhouse was not meant for anything under .25. The restriction with the .22 barrel makes the valve dwell extremely long and waisting a ton of air. But with that said there is a powerhouse valve for the 7/8 tube, but highly recommend the complete lower that Don makes. Besides if your using the stock barrel you shouldn’t go over 750fps or accuracy starts opening up.
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What kind of FPS if this valve was used in a Crosman 2240 10" , 9mm with a 2000psi fill shooting 60gr. roundbslls?
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Anyone care to elaborate on this valves design, function and tuning?
Where is it sold.. link?
Where is it sold.. link?
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Don Cothran makes the powerhouse valve but his website hasn’t been active for awhile now. He sometimes shuts he’s website down when he busy or on vacation etc. it’s been awhile now so I don’t know what he’s up to or when he’ll be back online.
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It’s a balanced valve designed for big power. Doesn’t respond well to hammer spring adjustments. It’s like an on/off switch. Not much tuning can be done except modifying the hole in the valve stem. @Motorhead has more in depth knowledge on this valve
It appears that Airgun Revisions and Don Cothran have some type of business deal where the former is the salesman for his products. If you look on the AR website you’ll see some of the pistols he put together from Don’s parts. I’m glad he started selling Don’s parts. I imagine sales have declined since not many guys are into tricking out 2240s and marauders like they were 10-15 years ago.
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Works well with a reg, you don't need a heavy hammer spring, the higher the pressure, the greater the power. I've used the smaller of the two xfer ports Don offers, don't have any dwell issues whatsoever in 22 caliber.
We can't all afford $3000.00 pellet guns.
We can't all afford $3000.00 pellet guns.
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Sadly I believe Don has retired and I don't believe the site will be back up again. Not sure what will happen with all existing stock, he does make some really awesome stuff.
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Don’s website is done and he will be fully retiring Within a year. All but the handles will now go through AR in the days ahead.
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I am both service and sales. Don had reached out to me because he trusts and has confidence in my work.
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Dana, all existing stock except for some bolt handles and oddball items will be going through AR. Don will be having his friend and machine partner of many years produce the parts for him that will be sent to AR. Only the parts that are the high sellers will remain. Don will be fully retired within a year but still retain ownership. Don will be focusing on only his personal project as far as Airguns go. I can only hope his OTHER valve becomes Reality.
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Full barrel machine and install, The custom designing of finished product, all services for his gun’s from customers and that was authorized by Don. What you seen as far as the carbines and the choice of stocks was all me. Don has been after me for years to build gun’s for him.
There is no Burger King ordering of guns anymore. This is because it takes a toll on us as airgunsmith’s and is not profitable. Plus when guns are on my website it’s a buy and ship thing and no waiting months for the gun. Technically more guns will be put into the market.
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Are you a sponsor of this forum? I believe you're supposed to post these advertisements in the industry news section.
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