does anyone know about boreing an engine to increase its power if you can do that with a nitro enginehow can you do that please respond

There were .15 conversions for OS .12 engines 10 years ago (give or take). In order to do what you are asking, you need to replace the piston, sleeve, and head (although I don't know of any compnaies still selling such kits).

Someone on this forum was going to "hone" his head and piston sleeve for more horsepower. In theory, it should work but you would have to be very careful in not taking off to much. But I've only seen it work on a ringed piston. You might be better off just getting an ABC kit for your engine. If you were refering to porting, then that is something more common. Although, I would get that done professionally. Try doing a search and see what you come up with. But if you want my opinion, there are easier ways in gaining more power other than this.