Reply To: UPDATE!! Lothar Walther Special Order for Impact .25 need 3 more to place order

Forums PCP Airguns UPDATE!! Lothar Walther Special Order for Impact .25 need 3 more to place order Reply To: UPDATE!! Lothar Walther Special Order for Impact .25 need 3 more to place order



If you have unlimited adjustments I would say crank it up to the max when shooting slugs from a slug barrel. But in the stock configuration both the Impact and the Impact X are limited to about 150 BAR. Regulator creep is a different topic. My gen1 has creep-ed up to 170 but when functioning properly 150 is the highest you can set it. So, the question now is what can you do to go higher?

I spoke with Ernest at FX USA about power tunes and this is what I learned. The new X version of the Impact is different in more ways than just the Smooth Twist X barrel. The trigger housing is different concerning the regulator. The trigger is also I think but I always loved the trigger already so really didn’t go into that topic further. The new trigger housing now has a longer regulator. You can get a higher BAR setting with both the gen1 and the new X version by increasing the number of metal washers within the regulator. Since the new version has a longer regulator you can get more of the washers in the new regulator but both can be increased in the same way. These metal washers are basically the spring that holds pressure being regulated so a stiffer “spring” means a higher regulator set pressure. With the new regulator and the additional metal washers you can get up to 170-175 BAR top end set pressure. Keep in mind I had one conversation on the phone so I can’t answer any specific questions but this should give you the main information to understand how you can now get above the 150 BAR ceiling of the gen1.

Other power potential can be unlocked by improving the air flow from the cylinder all the way to the barrel. This is basically why helium works better than air, it is a smaller atom than nitrogen that makes up around 85% of air (and the other components of air as well), so it flows faster. More gas getting through the valve area means more gas (higher pressure) behind the slug/pellet pushing is to go faster. The longer the barrel, the longer the gas also has to push before the projectile leaves the muzzle, hence a faster muzzle velocity. He mentioned how to improve the flow in a couple of ways which I cannot specifically remember at this point. But whatever the part within the cylinder to barrel path, it essentially means enlarging the area that your chosen gas has to move from point A to point B. It’s really not rocket science, I’m sure you could raise it to that level but for our purposes, the majority of gains will be achieved with simple enlarging techniques. One caveat, at the high pressures used in PCP rifles it is possible to increase turbulence when increasing flow negating the benefit so choice of parts has to be made with that in mind. Take a look at the schematic and you can pretty much figure out which parts can be modified to increase flow (hopefully without turbulence). When you have a better flowing pathway from the tank, it stands to reason that you have a stronger push the entire way to the end of the barrel. One other way is to keep the valve open longer, again, so there is a stronger and longer push behind the projectile because once the valve is shut you will lose the additional push coming from the cylinder, at that point it will only be from the regulator chamber forward.