Operation TX

[TonyL]

Excellent, Mick.

And, as you say, so easy for anyone to do without access to specialist machinery / lathe etc.

As you say, I bet it's already very nice, but even better with a little more fine tweaking.

Cheers for sharing.

[Gugglebox]

Thank, this is a perfect thread for me as I'm leaning towards a TX and looking forward to a tinker. I look forward to seeing how the experts do it.

[Shed tuner]

Perfect... that's the thing with tuning a TX; they are such a good base, just sorting the seal and the stroke makes a gun gun excellent.

Not that you are likely to be short of ideas, but in keeping with the no machining / moderate costs, I'd also consider

- Roller thrust rear needle bearings (about £2.50 of the 8ay), make cocking smoother
- beer can piston sleeve
- new tight fitting Custom guides (cheating on the no machining, I know, but if they are available "off the shelf"....)
- LGU seal - they seem quite a bit more efficient in most guns that the HWs
- centre floating guide

I would say consider gluing a sleeve into the port, but it doesn't look like you have any slam, and if you are considering lightening the piston, taking the port down may introduce some bounce with tighter port... unless you want to shoot FAPs (I would !), in fact I'm not even sure I'd lighten it at all...

[T 20]

Excellent, Mick.

And, as you say, so easy for anyone to do without access to specialist machinery / lathe etc.

As you say, I bet it's already very nice, but even better with a little more fine tweaking.

It seems really nice how it is Tony

The big surprise is that my first test run with a reduced stroke showed Superdomes running over 12 hence the removal of the 4mm spacer.

It certainly feels a lot better than standard but I'll let the AirArms lads have a play and give their opinion.

I'm a bit out of practice with this tuning lark as I haven't done much for two years now --- nice to get back in the swing of things.

Perfect... that's the thing with tuning a TX; they are such a good base, just sorting the seal and the stroke makes a gun gun excellent.

Not that you are likely to be short of ideas, but in keeping with the no machining / moderate costs, I'd also consider

- Roller thrust rear needle bearings (about £2.50 of the 8ay), make cocking smoother
- beer can piston sleeve
- new tight fitting Custom guides (cheating on the no machining, I know, but if they are available "off the shelf"....)
- LGU seal - they seem quite a bit more efficient in most guns that the HWs
- centre floating guide

I would say consider gluing a sleeve into the port, but it doesn't look like you have any slam, and if you are considering lightening the piston, taking the port down may introduce some bounce with tighter port... unless you want to shoot FAPs (I would !), in fact I'm not even sure I'd lighten it at all...

That's the idea Jon

I buy everything in and make absolutely nothing that can't be bought.

If anything doesn't work or is a waste of money I'll post that on here as well.

If I decide to sleeve the transfer port down I'll try to source the tubing from the rack in B and Q.

Obviously I'll need to swap all the guts out into a .177" TX at some point to see how it all works in the Ladies calibre.

The total cost of parts so far is about £35 plus shipping and you end up with a spare LGV seal, if you could find a source of LGU Pistons the price would be about £24 plus shipping which has got to be a bargain.

I'm not sure if the beartrap would work with the LGV/LGU piston as my TX has had it removed.



All the best Mick

[TonyL]

It seems really nice how it is Tony

The big surprise is that my first test run with a reduced stroke showed Superdomes running over 12 hence the removal of the 4mm spacer.

I'm a bit out of practice with this tuning lark as I haven't done much for two years now --- nice to get back in the swing of things.

I buy everything in and make absolutely nothing that can't be bought.

If anything doesn't work or is a waste of money I'll post that on here as well.

The total cost of parts so far is about £35 plus shipping and you end up with a spare LGV seal, if you could find a source of LGU Pistons the price would be about £24 plus shipping which has got to be a bargain.

All the best Mick

Looking very efficient already then, Mick.

Out of practice....nah! Once you've got it, you've got it, Michael, and that you most certainly have! And that two years basically corresponds with the Bash concept, so you've been pouring time and effort into that.

Excellent plan re using bought in parts, so that many more people can replicate, and what a great value for money tune it's proving to be.

[Shed tuner]

I'm not sure if the beartrap would work with the LGV/LGU piston as my TX has had it removed.

All the best Mick

@ ~76mm stroke and a MK2 comp tube, it will work fine. MK3, it won't catch.

In .177, I think you'd be pushing it with that stroke and a std port

[T 20]

@ ~76mm stroke and a MK2 comp tube, it will work fine. MK3, it won't catch.

In .177, I think you'd be pushing it with that stroke and a std port

If I get a .177" TX to play with it may be worth sleeving the transfer port down to up the SCR and then increasing the spring preload.

If that doesn't work little machining to increase the stroke and reduce the port length wouldn't be out of the Question.

All good clean fun though Jon.



All the best Mick

[NickG]

You could always lighten that piston , by losing the skirt.

[T 20]

Thank, this is a perfect thread for me as I'm leaning towards a TX and looking forward to a tinker. I look forward to seeing how the experts do it.

Hi Gugglebox

The TX is far easier to work on than a HW77/97, the only advantage with the 77/97 being the shorter transfer port but this can easily be sorted on the TX if needed.



All the best Mick