(DIR) Return Create A Forum - Home --------------------------------------------------------- Chainsaw Repair (HTM) https://chainsawrepair.createaforum.com --------------------------------------------------------- ***************************************************** (DIR) Return to: Chainsaw Collection Pics - Signs - Whats on your be... ***************************************************** #Post#: 75146-------------------------------------------------- Re: Whats on your bench today By: HolmenTree Date: December 30, 2016, 1:00 pm --------------------------------------------------------- Chy, really nice torches you have! I use a much larger torch to braze silver solder when I replace the tungsten tips on my stump grinder teeth. Pretty tiring after awhile especially with the heavy hoses. I know aluminum isn't used for tune pipe construction and the only lightweight metal that can be used is titanium. Some day we may see a way to cast some kind of aluminum alloy for tune pipes. #Post#: 75166-------------------------------------------------- Re: Whats on your bench today By: chy_farm Date: December 30, 2016, 9:22 pm --------------------------------------------------------- Hi Holmen, thank you for comment. Seems you do good brazing job now and then, wish to see some pics of your works, since I did not have any experiences of this kind. And yes, I agree Holmen, I do not think aluminum is applicable material for tuned pipes at least at this point unless we are able to find a better heat-resistive aluminum alloy. My calculation for this Echo twin was like this showing below, have estimated the max temperature of exhaust gas to be nearly 500 degrees Celsius at 11000 rpm. Thought this temperature might affect aluminum to degrade its quality. #Post#: 75169-------------------------------------------------- Re: Whats on your bench today By: 3000 FPS Date: December 30, 2016, 9:37 pm --------------------------------------------------------- Let me see. The cylinder is aluminum and the piston is aluminum and the crank case is magnesium which is similar to aluminum when tig welding. #Post#: 75172-------------------------------------------------- Re: Whats on your bench today By: chy_farm Date: December 30, 2016, 9:47 pm --------------------------------------------------------- So do you reckon this temperature does not affect the material? Chy #Post#: 75175-------------------------------------------------- Re: Whats on your bench today By: 3000 FPS Date: December 30, 2016, 10:53 pm --------------------------------------------------------- I do not know without trying. I was just pointing out that there is a lot of aluminum already used on the saws and it seems to stand up to the temperatures pretty good. Now with that said the thin material that is used for making a pipe might not hold up as well but with out trying it I do not know. The tuned pipes by their design seem like they would dissipate heat fairly well and there are no restrictions to build up heat. #Post#: 75178-------------------------------------------------- Re: Whats on your bench today By: chy_farm Date: December 31, 2016, 2:10 am --------------------------------------------------------- This sounds reasonable 3000FPS, and one thing came on my mind is that I may perhaps dissipate excessive heat by adding some pieces of aluminum heat sink on to the outer surface of the exit part. I have several types of them in hand, hope they will help. Chy #Post#: 75185-------------------------------------------------- Re: Whats on your bench today By: HolmenTree Date: December 31, 2016, 8:13 am --------------------------------------------------------- With all the research I did over the years I understood that aluminum cracks easy and weakens greatly at the high heat in the header pipe. Plus aluminum loses the heat too quickly, when you want heat to stay in a pipe for best performance. Here's a pic from 1988 when I insulated my tune pipe on my YZ bikesaw to speed up warm ups and making the best power for the cold start with 3 cuts. #Post#: 75187-------------------------------------------------- Re: Whats on your bench today By: aclarke Date: December 31, 2016, 10:53 am --------------------------------------------------------- Consider shortening the pipe if you use aluminum as the EGT will be a bit lower and its effective rpm will be at a lower rpm. #Post#: 75191-------------------------------------------------- Re: Whats on your bench today By: jmester Date: December 31, 2016, 1:41 pm --------------------------------------------------------- [URL= (HTM) http://s1250.photobucket.com/user/jmester/media/IMG_0538.jpg.html][img<br />width=800 height=597] (HTM) http://i1250.photobucket.com/albums/hh535/jmester/IMG_0538.jpg[/img][/URL] Trying to get organized. Going from this. #Post#: 75192-------------------------------------------------- Re: Whats on your bench today By: jmester Date: December 31, 2016, 1:43 pm --------------------------------------------------------- To this. Need to get a couple more boxes and envelopes to be able to finish it up. [URL= (HTM) http://s1250.photobucket.com/user/jmester/media/IMG_0539.jpg.html][img<br />width=800 height=597] (HTM) http://i1250.photobucket.com/albums/hh535/jmester/IMG_0539.jpg[/img][/URL] ***************************************************** (DIR) Previous Page (DIR) Next Page