Nieto_Marcos - The first thing I would ask you is how would you characterize your flying style? Are you a more scale type pilot or do you fly 3-D?

I am currently flying a G.P. Pitts with a DA-50. I also had a Fuji-50 in my first gas project with this airplane. The Fuji ran very well for my style of flying, which is scale aerobatics. The only issue I had with the Fuji was that it was hard to flip start. I had one of the earlier models, but I understand the newer version has been improved to make it easier to start. If you are leaning this way I would really check this out before purchasing. Mine was a real bugger to get it going. Once it started it ran very well and provided ample power for my flying style. Never had a dead stick.

On the my second gas project I decided to go with the DA-50 mainly because I wanted electronic ignition and I felt the DA was best in class. The DA is the cream of the crop and the power difference is very noticeable. The Pitts is not your typical 3-D machine, but if your inclined to fly 3-D then I would definitely go with the DA-50.

The Fuji actually ran a bit smoother than the DA simply because of the large flywheel on the crankshaft. The Fuji was much easier to mount with no stand-off spacers to contend with and there was no cutting into the firewall like I had to do with the DA because of the carb location and cowling space to work with. I used custom made spacers from Aerografix with a Pitts style muffler. You only need one battery with the Fuji vs. two with the DA. Engine for engine the DA is by far more powerful, but then you have to determine what you need and eventually want in making the final decision. Both airplanes balanced out without requiring any lead. I have attached two pictures of each engine showing how the DA and the Fuji mounted.

Hope this helps