Originally Posted by Lol Moore
Been working on this idea for the last month with some interesting results. Still work in progress as I have still to get through various combinations of length/diameter and shape of 'rods' that enter the port. Using a nose extension with 4mm hole in center to accept threaded rods. My TP is 3.9mm dia and initially started using M4 nylon bolts reduced to 2mm for fear of a nasty thwack and one knacked compression tube. Am confidently using M4 brass bolts now and have had them full length of transfer port at 3.4mm in dia.
One reason I wanted to do this was to try and work out where the piston stops and hence cylinder gap. Another reason was to see if I could eliminate bounce on ultra light pistons. Results thus far indicate, on my TX, the piston stops somewhere around 1.8 to 3 mm but need to do further tests. Also want to try with different strokes and piston weights - so many variables! One 'rod' I tried changed my aim points quite substantially at the longer ranges, accuracy bombed after about 30 yds so shape is another headache!
Anyway, it's all fun and keeps me busy when the telly is crap or kids/wife doing my head in!
TX200HC, Prosport, LGV - ex PCP pussy!