Ahh, gotcha. Chrono for my .177 long barrel HW97K with stock spring and seals very similar to what you were getting, about 14-14.7 depending on pellet. Interested to see how your 77K breaks in.
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Tuning My First Attempt at Tuning
- Thread starter Zut
- Start date
Paul Watts just compressed them once to coil bound and that’s it. That’s what I do.(see his awesome videos he shares an amazing amount) I do it on a drill press.
I also size a Vortek seal (on a lathe)before assembling so I don’t have to monkey around so much shooting and waiting ‘n wondering for it to break in.
Vortek springs come preset. ARH only if it comes in a kit
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I'll try that next time. I do my seals on a lathe too. Depending on how the Vortek seal feels I may or may not size them manually.
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Sorry. Once again my inability to start from the beginning and follow the thread properly has caused me to screw up. Sorry. I'll go now.
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Dont this mean for a few bucks he will preset the spring you order?
Set Spring Not In A Tune Kit
Maccari Custom Airgun Shop. Airguns and related accessories. Springs,tune kits,gunstocks,Beeman, Rws, Webley and many others. Sales and service
www.airrifleheadquarters.com
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I've tried sizing the Vortek seals. Several times in fact. I've found that it only shortens the life of the seal. It also reduces their wiping abilities which could lead to increased dieseling.
They shouldn't fit too loosely because they don't use air pressure as much as traditional parachute seals to seal to the bore. Even though Vortek seals may feel tight after sizing themselves they still make more power than parachute seals. Parachute seals statically have little drag when sized traditionally but they have lots of drag dynamically when air pressure balloons the seals lip against the cylinder walls.
Vortek seals are cupped and some are grooved so they use air pressure to seal, but it's to a much much lesser degree than traditional parachute seals. Sizing them down to reduce the drag down to traditional values reduces their abilities to adapt to compression tube abnormalities.
Parachute seals are good to keep on hand if you get a tube that is tapered or out of round. The softer pressurized lip seals better to abnormalities in the cylinder.
Size the Vortek seals if you want to. It will shorten the break in, but removing material will shorten their life. It may also increase dieseling and your extreme spread on compromised compression tubes. It's your call. I've never found the juice worth the squeeze.
They shouldn't fit too loosely because they don't use air pressure as much as traditional parachute seals to seal to the bore. Even though Vortek seals may feel tight after sizing themselves they still make more power than parachute seals. Parachute seals statically have little drag when sized traditionally but they have lots of drag dynamically when air pressure balloons the seals lip against the cylinder walls.
Vortek seals are cupped and some are grooved so they use air pressure to seal, but it's to a much much lesser degree than traditional parachute seals. Sizing them down to reduce the drag down to traditional values reduces their abilities to adapt to compression tube abnormalities.
Parachute seals are good to keep on hand if you get a tube that is tapered or out of round. The softer pressurized lip seals better to abnormalities in the cylinder.
Size the Vortek seals if you want to. It will shorten the break in, but removing material will shorten their life. It may also increase dieseling and your extreme spread on compromised compression tubes. It's your call. I've never found the juice worth the squeeze.
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