I would like to see some ideas and proven mods. that would increase the power of my little diesel in my 2005 3647. This has been a good little tractor, but as the warranty has long since expired, i am interested in bumping the power up on this little unit. I think it would be a lot of fun to have this size tractor putting out power in the 60-70 hp range. Is this feasible? Is it even achievable? I may have to be content with just running a straight exhaust and turning up the fuel pump just a bit. This little engine is supposed to be bullet proof so lets see what we can make it do!! Let the ideas roll boys!