Interesting findings of Walther LP53 and Lucznik

[clarky]

Thanks bro...tell your engineer to go with drilling out the guide rod provided in the kit to go over the guide rod in the pistol with a slip fit.
He may have to skim 1.5mm off the rod length to ensure it does not collide with the piston head guide rod during full cocking

Just to up-date this old post with the conclusion of my work on the LP53 ....i achieved 495 fps and this with the heavier Rws R10 8.2 grain pellet.

The power pod....my own version gave similar to the one now provided but i used a black delrins guide of slightly more slip. The production version is quite tight to facilitate the removal of spring twang but i found my version with 0.1mm clearance inside the spring did not produce any twang in the slightest but released all the spring energy.

I also fitted a TR Robb style piston head but my own version with a piston weight similar to the one in the power pod kit.
Finally after fairly extensive research i found that RWS R10 and Geko work best due to the walthers tight barrel, indeed even in std spec my gun got 407fps.... out gunning my Hw40 before i even started the project.
The Geko gave 405 fps and half inch groups at 8 yds at half the price.

That completes the tuning work, but i later went onto produce a K short barrel version which handles beautifully but requ ires the use of the cocking knob.
Love these Beaver tail Walthers once tuned.