Hello all. Just wanted to share something I did to my V2T that was inspired by @weevil. Thanks for the information. I made a new poppet valve and stem but used titanium instead of steel for the stem and also filed 1mm off the diameter of the stem for 10mm behind the poppet. I used POM instead of PEEK for the poppet because I wasn’t sure if I could be precise enough to polish the poppet face of PEEK. And I have to say, what a PITA to file titanium. I don’t have a mill or lathe, all I have is a decent drill press so everything was done with that and by hand. Drilling perfectly in the center of the POM was a challenge, after that it was trying to stay patient with Diamond and metal files. Stock valve on right, mine on left. I didn’t try to get the contour perfect, I was getting nervous about breaking it. The stock poppet weighs 41.5 gr and the new one is 26.8 gr. Everything is back together and I was able to shoot it today. I need less HST now, about one less revolution minimum to achieve the same FPS but that’s comparing it to warmer temps. Valve dwell seems very fast. The ES and SD are still a bit higher than I’d like but damn it shoots nice. Granted it’s only 47 yards, that’s all I have, but it shoots great. On the left of the target is just initial HST dialing and letting the V2T adjust from going from 68 to 35 degrees. After it settled down, I shot the next 5 groups in a row with two different slugs. The last with the KO’s I think I thought I could just point and shoot so it got a bit loose. Oh, and it’s holding air.
Sorry for the long post.
Edited to add that all the tight groups were 5 shot and I think 8 on the last KO. And I hadn’t polished the seat face yet in the pic.
Sorry for the long post.
Edited to add that all the tight groups were 5 shot and I think 8 on the last KO. And I hadn’t polished the seat face yet in the pic.
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