Originally Posted by Dk-79
Buut, it takes a lot of time and tuning.
could you elaborate on what sort of tuning you are referring to?
Im looking to get an additional 50 shots out of the small tank. (30% increase in efficiency)
Valve spring too stiff: Another possibility when you’re having a hard time getting sufficient velocity is that your valve spring is too stiff. Installing a softer spring allows the valve to stay open longer and allows lower pressure operation and higher velocities. Conversely, if your efficiency is terrible your valve may be staying open way too long and might be improved with a slightly stiffer valve spring. Changing this spring requires taking the valve out, and thus requires a special tool, a lot of work, and retiming the ‘gun. I only recommend this for those experienced with the inner workings of the Autococker.
^^would the valve also stay open longer if the mainspring was stiffer? I believe the nelson hammer kit has a stiffer mainspring right?