Airsporter RB2 tune

[Shed tuner]

yeah, the goldstar has a pretty fat cylinder, I think 28 or 29 mm bore. Mine has also long since gone.

Ref the seating nipple, I did experiment with a transfer port sleave on TX that was left deliberately slightly protruding, such that it woudl seat the pellet ~0.75mm into the bore. It was very consistent, but did cost me a bit of power - I think it was too deep; something like a 0.3mm protrusion would probably be good.

[look no hands]

yeah, the goldstar has a pretty fat cylinder, I think 28 or 29 mm bore. Mine has also long since gone.

Ref the seating nipple, I did experiment with a transfer port sleave on TX that was left deliberately slightly protruding, such that it woudl seat the pellet ~0.75mm into the bore. It was very consistent, but did cost me a bit of power - I think it was too deep; something like a 0.3mm protrusion would probably be good.

It might even be around the 30/31mm mark, I remember stripping one many years ago and the piston came out the main body tube without having to remove the maxi grip rail (which you can't do with the Superstar), the pistons seem to be different (according to Chambers) but the piston seals are the same part number for the Supersport/star and Goldie, which means 29mm, so the inner compression tube must add a couple of millimetres to the total.

Pete

[Shed tuner]

It might even be around the 30/31mm mark, I remember stripping one many years ago and the piston came out the main body tube without having to remove the maxi grip rail (which you can't do with the Superstar), the pistons seem to be different (according to Chambers) but the piston seals are the same part number for the Supersport/star and Goldie, which means 29mm, so the inner compression tube must add a couple of millimetres to the total.

Pete

yeah, I meant the actuall compression tube, so 29mm makes sense. must be at least 1mm wall, so 31mm ID for the action tube, which in turn would be at least 1.5mm wall, so 34mm OD at a guess ? Big beastie.

[Oddbob08]

Well I was toying with the idea of sleeving down my Eclipse cylinder, that's something like 30mm id, and I have a spare piston to use, does anyone know of a good source for the tubing? If someone can make them to my dimensions that would be even better.

I'm also at the point where the piston I have for my RB2 is going to get cannibalised for bits to make a new piston using a spare Superxxxx piston, a lot of drilling, swearing and things being thrown across the shed.......

[Shed tuner]

i use various matal suppliers on e6ay. seamless hydro tubing.