For robs5230, TX V LGV pistons.

[robs5230]

P.S....I'm not sure if anyone has tried it yet (especially when the LGV pistons were readily available, making 25mm conversions easier), but I wonder how the Century might respond to a stroke reduction? Especially if it were done via nose extension, making it easily reversible, if later required?

Hi Tony
No reason the SS head won't work as it does in an 80, but I'd rather stroke be altered by the latch rod length (if I were going down that route).
Having said that, I've managed to get 80's running sweet on the standard stroke, especially in .177. I think the extra preload needed for .177 more than speeds up the lazy cycle of the heavy piston

[Waddy]

Currently sorting a .177 HW80 with an LGV piston & TX piston seal, it certainly does seem to need a lot of preload. I think the main reason is the design of the LGV piston, it has very thin skirt & the weight comes from the solid front end of the piston which means you can't get the length of spring inside the piston that you would normally expect in a piston.

It was doing 9.5 on its Walther spring, which I swapped for a square section Ox spring that was about a centimeter longer, this only managed 10 & made an awful noise in the drilled piston skirt, so it's now got a 31 coil TBT spring that I've yet to chrono but it's got way more preload now.

[TonyL]

Hi Tony
No reason the SS head won't work as it does in an 80, but I'd rather stroke be altered by the latch rod length (if I were going down that route).
Having said that, I've managed to get 80's running sweet on the standard stroke, especially in .177. I think the extra preload needed for .177 more than speeds up the lazy cycle of the heavy piston

Agreed, Rob.