Vortek HW97/HW77 PG4 Steel HO Tune Kit

Due to the enhanced radial stiffness of the weighted steel PG4, and the damping properties of our VacSEAL design. (F.A.S.L)For every 1000ft above or below will be approximately .029 difference in velocity, thus foot-pound (Ft/lb, Joules) of shooting energy. Vortek's Location of testing is 578 Feet.Above.Sea.Level. x .029 = 29 fps approx Joules= .7475 ft/lb Easy, do-it-yourself with virtually no pre-load force on assembly. NEW Vortek PG4 STEEL HW97 Tune-kit PG4STEEL Fitting also, HW98, HW77 HW77 smaller compression tube seal size requirements. We Highly recommend the installation of our VacSEAL25 or 26 with the new PG4 STEEL. Choose 25mm VacSEAL. Works will all HW trigger arrangements. Upon closer to the firing sequence the VacSEAL26 piston geometry increased performance output dead-blowing sound and movement at the closure of the shot cycle. Though the PG4 STEEL Tune-Kit does not require a change of the OEM piston seal to work. Although testing between OEM and Vortek26 moly seal, we found greater performance when our VacSEAL25 or VacSEAL26 design was inside. OPTIONAL PISTON SEAL: Special Note for OLDER HW/77 air rifles having smaller compression chambers - your HW77 airgun serial# before 1446049 has a 25mm Compression Tube Bore!! Performance with VacSEAL26: High-Output full power up to 18ft/lbs/26 Joules *1100fps (.17cal)/290 m/s CP7.9g *710fps (.22cal)/220 m/s G14.33CP (Lead pellet) (16ft/lbs) *930fps (.22cal)/287 m/s G9.56g (tin pellet) (18.5ft/lbs) Contents of PG4 Steel Tune Kit: PG4 STEEL + 2 DELRIN INNER GUIDES High Yield valve wire power spring Lubrication for metal, plastic, and seals Installation: For Consideration when tuning power: It is the owner's responsibility to ensure the legality of their air gun power output. 1000 F.A.S.L.

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Vortek HW97/HW77 PG4 Steel HO Tune Kit