Acquired an older Revo with a Sirio Turbo Monster Head .27 engine in it for free. It looked in rough shape the guy said it had been sitting in a barn for a number of years and he thought engine was seized. Long story short I took engine out pressure washed frame and took engine apart cleaned very well, sprayed WD-40 on everything put it all back together and the thing ran awesome even on the original Turbo glow plug it came with. I’ve been very impressed with this engine. Not only is it quite a bit faster than my 3.3’s and almost keep up with my F5.9 but it’s been very easy to tune and very dependable. Wished they still made these engines. Oh well I’ll enjoy it while it lasts and hopefully still be able to find a piston and sleeve for it when it needs one. If anyone know where I could find that please let me know. Thank you