The following factors determine how much air volume will push the projectile (pellet or slug) inside the barrel. This air volume determines the muzzle velocity:

• The pressure of the plenum (regulated chamber). 
  
• The volume of the plenum.
  
• The diameter of the transfer port.
  
• How long the valve stays open.
  

How much volume of air is needed?
This depends on:

• The caliber.
  
• Length of the barrel. 
  
• Weight of the projectile (slug or pellet)
  
• The drag of the projectile inside the barrel
  
• Output desired energy.

1. Change the jets in a clean environment. The valve should never get dirty.
2. The Leshiy 2 can use 1 or 2 jets installed. If you install just one, be sure that the second hole is completely closed with a proper screw.
3. nside each jet must be installed a small spring with a brass pin: be careful not to lose this while changing your installed jet for a different one.
4. Jets installed can have different diameters (no need to use two of the same diameter).
5. With the KIT, you will have 23 alternatives (from 0,1mm to 2.4mm).
6. The maximum sum of the two jets is 2.4mm. More than this will not make the valve close faster (so no need to try bigger diameters).
7. The plenum pressure is also essential to get the greatest result (air consumption and accuracy).
8. If your Leshiy 2 (in .25 or .30 caliber) came from EDgun factory with only one jet installed (and a screw on the second hole), do not replace the screw for a jet unless you have the spring and the pin that should be installed inside each jet. This pin is in charge of closing the airflow while the valve is in the closed position.
9. Do not forget to have fun while doing your tests. Jets + Regulator's pressure will give you more than 360 possibilities.

Necessary to know:  
The best configuration for accuracy and efficiency depends on the following parameters:

Caliber and Lengh of Barrel
Desired Energy
Pellet or Slug used (weight and shape)

In EDgun we recommend the following setups for the New Forward Plug

For caliber .177 (4,5mm)

• Plenum pressure: between 65 BAR and 120 BAR
• Sum of power jets: 1,8mm to 2,4mm
• Note: pressures bellow 65 BAR may cause loss of stability after 25 meters

For caliber .20 (5,1mm)

• Plenum pressure: between 65 BAR and 130 BAR
• Sum of power jets: 1,6mm to 2,4mm
  
  

For caliber .22 (5,5mm)

• Plenum pressure: between 65 BAR and 140 BAR
• Sum of Power jets: 1,4mm to 2,4mm

For caliber .25 (6,35mm)

• Plenum pressure: between 80 BAR and 160 BAR
• Sum of Power jets: 0,6mm to 1,6mm

For caliber .30 (7,62mm)

• Plenum pressure:  between 100 BAR and 180 BAR
• Sum of Power jets: 0,2 mm to 1,4mm
• Note: We do not suggest to set the original EDgun regulator of the Leshiy 2 at pressures above 160 BAR.
  

Suggestion to reach the best air-consumption: 

After choosing your regulator pressure, use the power jets to reach a point between 10% and 20% (depending on the caliber and lengh of the barrel), below the maximum reachable energy (with that determined regulator pressure). To check maximum reachable energy with each reg pressure, try two jets of 0,1mm.

• Power Jets for Leshiy 2 · Master Kit