Author Topic: TX200HC Detune  (Read 1655 times)

Offline kirby999

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TX200HC Detune
« on: October 16, 2007, 08:31:28 AM »
Last week I emailed J Macarri about a lighter spring that would reduce my TX200HC to around 10.5-11fpe . He suggested a specific spring and seal and I ordered them . They came today in the mail . Quick delivery. After lunch I removed the stock and got out my spring compressor and went to work under the old pine out back. I was familiar with the disassembly this time and didn't even need  my instuctions . I removed the end cap/ trigger assembly after removing the stud that holds it in and then the spring wipping the tar from the factory spring . I noticed the new spring is a little bit longer . Some folks say to work on these TX's, you don't need a spring compressor , they may not , I prefer to use mine, especially with the longer spring I found it necessary . I removed the piston and compression tube and pulled the piston out . I cleaned it up and in a few minutes of careful prying , removed the factory seal without any damage . I then installed the new on , lubed the piston with moly paste and started to reassemble everything with a coating of tar on the new spring. I lubed the spring guide and went to install it and it went into the spring about an inch and stopped . Oh no, everything had gone smooth up until then. Well time to do a search . I found a post from a well know tuner who stated the spring guide should be a tight fit to reduce twang . He went on to say the spring when compressed would expand allowing the slightly oversized guide to work. That's all I needed to hear. I lubed the guide and inserted it into the spring , put the end cap / trigger assembly behind it with a block of wood to keep from messing up the finish and started the slow turn of my spring compressor , while keeping everything aligned until the screw hole of the stud that holds everything together lined up . The guide slid right up into the spring about half way through assembly . I finished putting the gun together and couldn't wait to try it out . This gun shot good before, but was a little on the hard side to cock and still had a good bit of recoil . The first time I cocked the rifle , a smile came on my face . I knew I had done right . I sighted it in at 20 yards and shot maybe 50 pellets through her . I think I had maybe one shot that deiseled . This is one sweet shooting rifle now. No twang The cocking is smooth and the force to cock it has been reduced by at least 25% . I shot from 12 yards , out to 35 and had no trouble keeping my shots inside my orange one inch dot. I'll get some numbers latter on this week if the weather permits. kirby
\" Shooting PCP\'s; I sometimes miss that  unmistakable smell of a springer . \"

Offline jon

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Re: TX200HC Detune
« Reply #1 on: October 18, 2007, 07:57:26 AM »
So when are you gonna start a tuning Biz David? Seems like you got it down pat, that R-7 you did was very impressive.
I like fancy bb guns

Offline kirby999

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Re: TX200HC Detune
« Reply #2 on: October 18, 2007, 08:21:25 AM »
No Biz for me , Just making my own stable a little better , one rifle at a time. Anyway I bugger up too many screws to please somebody else, although I am getting better with that too. hehe It'll give me something to play with this winter . That way they'll all be ready next spring, and I won't know which one to pick up and take to a match. . kirby .
\" Shooting PCP\'s; I sometimes miss that  unmistakable smell of a springer . \"