Home Tune Begins ( Air Arms Twangers)

[sharpshooter25 7]

From all the advice given from a pervious topic I what to share this with the people that are interested. Both my air arms stringers seem to have a poor firing cycle, start with chrono results before strip,

Pro-sport = 792, 789, 798, 804,803,821,799,799,804,794

TX200 = 824,819,804,798,801,808,802,802,799,802

Air arms pellet 8.4 with a 4.51 head size.

Now stripped and found spring end poorly finished, spring guides not bad, inside compression cylinder needs work. I will added more chrono result once relubed and polishing has been done and the Tinbum kit has been fitted to the Tx.

[sharpshooter25 7]

The right compression cylinder is from the pro-sport and is looks like some one at Air arms has spent a extra five mins horning out the inside.

[Skot Ruthless Teale 1,701]

hope the re-lube lowers the power a bit rather than increasing it........

[sharpshooter25 7]

Me to skot, the TX is shooting average 12.1 ft lb

[Skot Ruthless Teale 1,701]

I only worked out the highest figure at 12.06 for prosport and tx 12.66.

[sharpshooter25 7]

May have to take a coil off the springs, the pro sport was the only one with any pre load washers fitted ?

[davyt63 1,845]

hi SS25

yes the spring end needs some attention and may be compress a coil first,before removing a coil

if still high then take one off.pretty easy to do,if you get stuck check out the one i done on youtube.

 

keep us posted!

[sharpshooter25 7]

Cheers I will take a look as I think it will need some attention

[Elmerfudd 5]

I'd be tempted to reduce the stroke a tad before shortening the spring. A 10mm piston extension should reduce the power to a safer sub 11fpe while reducing overall internal movement without making the cycle lazy. You could even go for 12-13mm and add more preload for an even faster lock time. But then, that'd be ok on the TX, but will possibly increase the cocking effort on the prosport too much.

[sharpshooter25 7]

Nice idea

i will look at my result's with the home tune and the TbT kit before looking at short stroke kits.

[sharpshooter25 7]

Polished spring ends and degreased, these rifles will be back together and over the chrono by Sunday

[davyt63 1,845]

Thats better buddy, let us know how it goes.

[sharpshooter25 7]

Credit were its due the tbt kits fits well to the spring, polished spring and compression cylinder and trigger and just waiting on the misses to get home the moly grease and it's back together. Sized the piston seal and piston bearings.

[sharpshooter25 7]

Tx200 cylinder not pro-sport

[sharpshooter25 7]