Need help "Belleville washers" settings for Walther 1250 Dominator

[Sheharyar]

Guys I have a .22 Walther 1250 dominator.If any of you guys know about the belleville washer settings which can give higher fps.(by higher i mean 900+)
And and one more thing Does Thickness and Curvature of the Washer matter??

 

[cernunnos]

The washers are essentially conical springs, so yes, thickness matters. The angle of rise would matter, but I've never seen it as an option.

A standard way of changing the force of a stack is changing the pattern of orientation. Let's use parenthesis to represent the washers. Stacked ()() is the softest action, (((( or )))) is the stiffest, (()) is intermediate. Note that the stiffer actions have a shorter throw.

 

[BigTinBoat]

Since in your other post you were at 875 you do not need to raise the pressure much. You can likely leave the belleville washers alone and just add a shim of the same diameter somewhere between .004 and .01 inches thick. You can just add it to the end of the stack.

 

[Sheharyar]

BigTin can you explain what kind of shim Can I add.Plastic shim or the same metal one?

 

[BigTinBoat]

"Sheharyar"BigTin can you explain what kind of shim Can I add.Plastic shim or the same metal one?

Quite honestly - if you do not know what I am referencing it would be MUCH safer if you have someone who is knowledgeable in HPA do the job. 

But anyway here is a link to different size shims.
http://www.mcmaster.com/#catalog/122/3270/=14qfpvw

The ones for my Ninja's are 3/8" ID and 5/8"OD

I'm not familiar with the size of the walther bellevilles but you will need to know the inside and outside diameter. It will then be an experiment to see what thickness you need.
It could be just .001" or it could be .01". In some regulators a .01" shim might raise the pressure 100psi, in another it could actually overcome the regulator, which would mean you would have the cylinder pressure in the valve.

 

[Sheharyar]

Thanks.