Tuning Fx crown power plenum

[monaro]

I have had my FX Crown for around 1 year now & have just started playing around with it.

I have added Huma dual transfer port, Huma extra high pressure regulator, 7 gram hammer weight,Huma high flow probe,Huma high tension hammer spring,600mm slug liner in .25,6.35mm valve seat.When I was reading one of the forums there was a guy in Denmark I think by the name of Rogvi who had made a larger plenum for his FX Crown & wanted to know if someone can point me in the direction on how to contact him to see if he can make me one.

I am considering buying an FX Impact Mk3 & just deciding if it is worth the dollars to buy one.What I have heard & read they are excellent. Just taken the Hawke scope of my Crown & put a Pulsar day/nigjt scope on to hunt some rabbits & foxes.So have to save some more $$$$ before I cannot pay for an Impaact.

If someone could help with the Crown plenum from Rogvi it would be greatly appreciated. 

 

[Mask]

Rogvi lives on a small island in Denmark, you in Australia ..... I think the shipping would cost you a lot. I had 2 stainless steel plenums made by a turner, inspired by Rogvi's micro plenum, one with a slightly larger capacity (1 cubic centimeter) as it is 0.5 cm longer. On my crown, in. 25, the advantage was 3 / 4J, which added to all the changes you have already made, have brought me, with JSB from 2.2 grams, to about 75J. If you want to make a qualitative leap, you have to make larger plenums, like what a user from Croatia did .... A plenum of over 20 cc that is mounted in the needle / valve housing. Obviously, an extension for the tank must also be made. The work is not easy, but, if it succeeds, it gives excellent results.

 

[Mask]

Here are my 2 micro plenums. Any good turner is capable of doing this job.

 

[Mask]

Here is the plenum to be mounted on the front, in the seat where the needle and the valve are located