Quote from: Atom on April 01, 2019, 06:01:45 PMWith this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) ! Still need to work heavier hammer and harder spring...Take a look at going to a harder poppet material, such as peek, and reducing the poppet diameter as small as possible. Once this is done the OEM hammer and spring should be good for getting into the mid 60fpe range.
With this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) ! Still need to work heavier hammer and harder spring...
Quote from: mackeral5 on April 01, 2019, 10:43:01 PMQuote from: Atom on April 01, 2019, 06:01:45 PMWith this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) ! Still need to work heavier hammer and harder spring...Take a look at going to a harder poppet material, such as peek, and reducing the poppet diameter as small as possible. Once this is done the OEM hammer and spring should be good for getting into the mid 60fpe range. Factory poppet is 8mm and hole on valve is 7 mm ...
Quote from: Atom on April 05, 2019, 08:29:35 AMQuote from: mackeral5 on April 01, 2019, 10:43:01 PMQuote from: Atom on April 01, 2019, 06:01:45 PMWith this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) ! Still need to work heavier hammer and harder spring...Take a look at going to a harder poppet material, such as peek, and reducing the poppet diameter as small as possible. Once this is done the OEM hammer and spring should be good for getting into the mid 60fpe range. Factory poppet is 8mm and hole on valve is 7 mm ...Understood. A peek Poppet will make the valve a little more easy to open and you can make it approximately 7.5mm in diameter
Quote from: mackeral5 on April 05, 2019, 09:11:28 AMQuote from: Atom on April 05, 2019, 08:29:35 AMQuote from: mackeral5 on April 01, 2019, 10:43:01 PMQuote from: Atom on April 01, 2019, 06:01:45 PMWith this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) ! Still need to work heavier hammer and harder spring...Take a look at going to a harder poppet material, such as peek, and reducing the poppet diameter as small as possible. Once this is done the OEM hammer and spring should be good for getting into the mid 60fpe range. Factory poppet is 8mm and hole on valve is 7 mm ...Understood. A peek Poppet will make the valve a little more easy to open and you can make it approximately 7.5mm in diameter0.25 mm hmmm Can it be made of delrin plasic? How to separate poppet and steel rod (unscrew)?
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