arthurmoto1 Posted January 21, 2021 Author Share Posted January 21, 2021 And some offtopic - new engine for trike has arrived! That's another project. Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted February 16, 2021 Author Share Posted February 16, 2021 Hi everybody! There is no progress on this engine because of paratrike building you can see in another thread. The only upgrade is DIY hard anodising of the pulleys. Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted February 16, 2021 Author Share Posted February 16, 2021 And there are two old DIY 180 ccm engines. Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted March 12, 2021 Author Share Posted March 12, 2021 The first smoke was yesterday! Quote Link to comment Share on other sites More sharing options...
cas_whitmore Posted March 12, 2021 Share Posted March 12, 2021 Interesting , any video to watch anywhere Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted March 16, 2021 Author Share Posted March 16, 2021 So we have obvious success with the engine. It exceeded our expectations and shows approximately 90 kg of thrust but this can be brave statement. May be less and we need to fabricate new stand for accurate measuring. The engine needs new pipe and some flying hours to eliminate all bugs. Look for updates I'll make new photos soon. 1 Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted March 17, 2021 Author Share Posted March 17, 2021 I have only some photos at this moment and you can see the weight without exhaust. Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted March 26, 2021 Author Share Posted March 26, 2021 You can see next step. 1 1 Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 9, 2021 Author Share Posted April 9, 2021 Next step is expansion chamber. Everybody knows to make good power it is necessary to have 1/2-valve design and do not use mild steel. We decided to use temperature resistent stainless steel and hydroforming process. It was some period of tests and now we have obvious sucess. Wait some days and I'll show you photos. Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 10, 2021 Author Share Posted April 10, 2021 So you need matrix and 100000 kg oil pump to make hydroforming pipe. We take two sheets of 0.5 mm steel and weld them carefully together then pump them with oil inside the matrix. This is the photo of the first attempts. 1 Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 10, 2021 Author Share Posted April 10, 2021 And at last we have nice chamber. 2 Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 10, 2021 Author Share Posted April 10, 2021 The next step is to add the silencer. Quote Link to comment Share on other sites More sharing options...
hadi000mah Posted April 10, 2021 Share Posted April 10, 2021 interesting project that makes me excited to check the topic more than my Instagram Facebook whats app . . . . account nowadays be success hard follower from IRAN 1 Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 26, 2021 Author Share Posted April 26, 2021 Hi! Bad news! The first start of this engine was with the use of our old style exhaust and was absolutely great. But with new chamber we have lost approximately 1000 RPM of high range. So it is needless to say how difficult now is to make changes to produce new matrix and so on. But the aim of this project is to develop the best race engine ever and to win every championship and cup stages we can participate this year in our country so we have to make everything quickly. I have video but sorry the language is Russian. You can see the weight of the engine. I'm going to make English version after exhaust repair to show you. Cheers! 2 Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 26, 2021 Author Share Posted April 26, 2021 I was trying to add video but something went wrong. Once again. https://www.youtube.com/watch?v=7FdBpMeSFIs&t=31s Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 29, 2021 Author Share Posted April 29, 2021 Hi everybody! So good news! I was trying to check the dimensions of chamber and the decision was that it was too short. We are trying the engine to be the best at 7000 rpms but that pipe was suitable for 12000 rpms. OK! Yesterday some parts were welded additionally and the result is suitable but not perfect. It is very strong on 7800 rpms but not lower. Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 29, 2021 Author Share Posted April 29, 2021 We were trying to use our old style exhaust but it is not suitable for such wide exhaust port timing this cylinder has. And you can see 250 cc motocross chamber for comparision. Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 29, 2021 Author Share Posted April 29, 2021 And there is a problem with Walbro carburetor at 4000 rpms. It is so rich that the mixture explodes just inside the chamber! Under 3500 and higher 5000 rpms it's OK. Quote Link to comment Share on other sites More sharing options...
hadi000mah Posted April 29, 2021 Share Posted April 29, 2021 hopeful progress Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted April 30, 2021 Author Share Posted April 30, 2021 OK! Yesterday I was trying to find the solution of the carb issues and have found that it has very simple design. Such carburetors like Walbro are intended for use with not modified engines that have RPMs not higher than 6000 preferable less. They have only two metering systems, one for low RPMs and another for high. But this statement is not correct. It means one for lower and another for higher RPMs. So in reality you can adjust this carb on the middle range 4000-4500 RPMs but it will be lean on 7000 RPMs. Or you can tune it on 7000 RPMs but it will be rich on 4000 RPMs. You know the common motorcycle float type carburetor has needle for mid range and main jet for top range and in many cases accelerator pump. Google says the only solution is to use additional low pressure pump but I don't think so. So solution is to add one more jet for high RPM range. Quote Link to comment Share on other sites More sharing options...
Pete S Posted May 4, 2021 Share Posted May 4, 2021 Addition of a third jet to a pulse pump carburettor to enable mixture correction at high rpm. https://www.kartwiki.com/index.php/Ibea Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted May 7, 2021 Author Share Posted May 7, 2021 Thanks a lot! The same idea I was talking about. Quote Link to comment Share on other sites More sharing options...
hadi000mah Posted May 25, 2021 Share Posted May 25, 2021 whats up ? Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted June 13, 2021 Author Share Posted June 13, 2021 Sorry we have some delay because of paratrike building. Fortunately the trike has had the first sky time yesterday! Wait for video and for news soon. 1 Quote Link to comment Share on other sites More sharing options...
arthurmoto1 Posted June 21, 2021 Author Share Posted June 21, 2021 Hi everybody! So have good news, it was first fly yesterday. Everything is OK. The trouble with carb was solved with additional fuel pump. Engine is powerful but needs some changes in transmission. So wait for video! Cheers! 1 Quote Link to comment Share on other sites More sharing options...
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