Mk2 valve housing in mk1 impact x?

I've been told a while back that the two valve housing's are not the same, and neither are the plenum tubes because the MK2 has larger plenum space. An owner of both Impact's can provide better answers to that aspect. I was also just recently told that the valve stem assembly rod and springs are the same for all Impact's.

There is supposed to be a kit available. Call FX USA to inquire.

Pull the parts diagrams from FXAirguns.com. If the numbers between the Impact and Impact MKII diagrams are the same, you should be good to go. Major difference is the Plenum, other than that, I'm told it's the same mechanics and parts. good luck

Just tell them what you want to do, there should be a kit. If the girl doesn't know then a tech will help.

Hi everybody . I need your help as well regarding valve housing Orings. My gun is a new impact x . I have 2 valve housings one is the stock (the original of the gun and the other is the older model without the 3 milling holes . Both of them have the same thread and are matching in the same valve tube. The difference is that the older type is using 3 orings 10.5 x2 and the newest one (as it came from factory with the gun) is using 2 orings 10.5 x2 and the third one is different. 

In the parts diagram of fx if you check for impact x valve housing 3 orings are 10.5 x2. If you check in mkii page( probably the same vh for latest impact x ) one of the 3 orings code B29.1 is mentioned as 14x1.5. 

That is my problem .14.5 is very big and thin and doesn’t making seal. Is obviously that is not matching.Icant even charge the gun with air. Is this code ( B 29.1- 14x1.5) a typing wrong in the diagram? If I try to fit any other size i can’t fit the valve housing in the plenum tube.Can anybody tell me the right size of this oring? 

Thank you in advance.

You need a ValveHousing and a valvetube, new vh will not fit old vt.

Regarding oring, is wrong is 10*1.5 no 14 (fx schematics are wrong there)

Thank you Edosan .

You need a ValveHousing and a valvetube, new vh will not fit old vt.

Regarding oring, is wrong is 10*1.5 no 14 (fx schematics are wrong there)

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So to convert to the mk2 all I need it the valve housing and valve tube correct? That's what I thought but wasn't sure. The valve housing is where it store its plenum right? I will try asking them for valve house and tube..I dont know why but it have same part numbers as the one on older impact. I hope they aren't they same thing. Sometime these company dont even know what they doing when they write these diagrams.

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The valve tube acts as the plenum and is only 5cc larger on the MKII. Not worth the money you will spend in my opinion.

You need a ValveHousing and a valvetube, new vh will not fit old vt.

Regarding oring, is wrong is 10*1.5 no 14 (fx schematics are wrong there)

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So to convert to the mk2 all I need it the valve housing and valve tube correct? That's what I thought but wasn't sure. The valve housing is where it store its plenum right? I will try asking them for valve house and tube..I dont know why but it have same part numbers as the one on older impact. I hope they aren't they same thing. Sometime these company dont even know what they doing when they write these diagrams.

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The valve tube acts as the plenum and is only 5cc larger on the MKII. Not worth the money you will spend in my opinion.

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I heard from jon at usa said its 25% more volume. I'm guessing that's 5cc. But 5cc extra is better than none right? I guess it depends on the price. If its $100 or lower I'm ok with it. I'm only concern is they have the same part numbers on fx part diagram. I just hope they dont send my another mk1 valve house and tube that I already have. I want the new valves for the mk2.

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I have the same trouble upgrading...please help us 

I ordered all the parts for upgrade 3 Months ago still no word yes ordered from FX USA on the 15 th. Of this month was 3 Months.good luck.

MKII upgrade is a terrible investment with very little gain. You can have way more performance by adding a 6.35 or 6.5mm valve seat and a larger plenum. With the MKII upgrade you only gain 5cc of plenum volume. With an aftermarket plenum you can have up to 75cc or even more by combining the 75cc eccentric air tube made in Poland (my design copied from this forum 4-25-19) with an external plenum as I do. Michal's plenum from Poland was $140 shipped when I purchased mine (MKI or MKII). With a little port work on your brass inlet and pellet probe you can have a 70+ fpe .22 or 120+fpe .30

My gen 2 makes 132 fpe with a 66gn NSA slug at 948fps 150 bar. 50gr JSB does 1072 fps at 150 bar. I have Michal's eccentric air tube from Poland + a 20cc external plenum, a 6.35mm valve seat, a 4 gram hammer weight and porting. Total cost under $200

[email protected] Tel. 883999733 dial with international prefix +48 (Poland) He's been swamped with orders so expect 30 days or more for your order.

http://www.airguntuning.pl

Pictures of my design copied from this forum 4-25-19 and being produced by others

Would love to have one of these plenums but I haven't gotten any response from my emails.

Would love to have one of these plenums but I haven't gotten any response from my emails.

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Maybe you can go through his web page or similar? He is a business owner serving the airgun community there from what I understand.

Would love to have one of these plenums but I haven't gotten any response from my emails.

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He is slow to respond and swamped with orders but keep trying and you'll end up with one.