While figuring out which supercharging method should I use, I always had the curiosity to know why this particular engine spits so much unburned fuel from the exhaust and the inlet as well. The siplest thought was valve leakage. There’s no other way so much fuel can escape both from the inlet and outlet of the combustion chamber. I decided to use the lapping method which is used on full sized engines. In my case I used polishing compound (thicker one) instead of the actual paste that is used for this purpose as it’s too thick and harsh for these tiny valves. The result speak for itself. I was never able to rev the engine past 11,000rpm, while now it revs happily almost to 16,000rpm. I still cannot believe that by simply polishing the valves we can have so dramatic changes in the performance of this little engine. Probaply after all the disassembly and assembly process, I accidentally fix the real problem.
About the supercharger. As you can see on the video, it’s pretty much impossible to have any gains from an engine that barely works right. I’m surprised though that the blow through setup worked better. As I’ve said 2 years ago, a positive displacement supercharger would work perfectly fine.
Model engine companies like O.S have released in the past supercharged four stroke single cylinder engines with a roots type supercharger (O.S FS120 supercharged). This alone gives me hope that I will make it work.
► RC Engines Links:
➜ Get the engine here! https://bit.ly/3h3PByI use code: jq90 for 10% off
➜ Starter kit for this engine: https://bit.ly/2ERMk8V
➜ Other Toyan Engines: https://bit.ly/30Z8NYr
———————————————————————————————————————-
►Tools that I used on this video:
➜ SEQURE SQ-ES126: https://ban.ggood.vip/WLKx (code: BGSQES126, US$76.43)
➜ 63 in 1 Multi-Tool Magnetic Precision Screwdriver Set: https://ban.ggood.vip/WLKy (code: BGHKC5, 35%off)
➜ 3D Printers: https://ban.ggood.vip/WLKw
➜ Ender 3 Printer: https://ban.ggood.vip/VTPJ
➜ RC Parts: https://ban.ggood.vip/WLKv
———————————————————————————————————————–
► Subscribe! https://bit.ly/2m1d1y7
► Instagram: johnnyq_90
►Support my videos!: https://www.patreon.com/johnnyq90