So ive got a hangar 9 edge 540 1.20 and a Giant u can do 3d. So im woundering (were going to imagine money doesnt matter) so strictly on performance what does the best for hovering and high impact 3d? ive heard that a 2 stroke is the worst choose, 4 stroke is 1 step up and gas is the best. In the size category im looking at my choices are saito 1.80, os 1.60 fx and Zenoah G38. So tell me generally what kind of engine is best, 2 stroke, 4 stroke or gas? thanks guys!

Do you like Fords, Chevy, or Dodge??

IMO, gas is the best if you can get the power:weight:wingloading in a good ratio. 4c generally have better spool up wich is why so many people like them for 3d. Some 2-strokes are ported for big props and low rpm and produce 4c like spool ups.

On my 160 cap 232 i went with a DL 50cc and am so happy with it. I would concider it over the zenoeh g38. The DL cost 390$ shipped, weighs 50oz with muffler/ignition, and produces about 27-30 pounds of thrust. The spool up of the engine is just great for hovering. My GP Cap weighs 13.5 pounds dry and is hovering at about 25% throttle on the stick. Best of all, i can easily get a 20 minutes of flying on the stock 22oz tank. Big glows suck fuel fast. 22 ounces will last you about 10-15 minutes depending on the engine and you are burning gas that costs 13$ a gallon.

I also read that 4 strokes are better for 3-D, but when swapping engine in my harrier 46 from a 91 Fs to a 91 twostroke my ability to hover really steady and calm, improved 100% over the night, go figure?? Now I have only twostrokes in my 3-D planes exept my new Harrier 100 that has a 180 Fs mounted, but I have not maidened it yet

gas is not an apropiate option in a 120 3d edge.
Some 2 strokers perform similar to some 4 strokes.The new 91 was designed for 3D pilots in mind,I think..older 2 strokes may perform poorly for this type of flying.

How about differnt airplane?????

That Edge is a very outdated and heavy bird compared to other available today.

For hard core 3D action, with a 120 you want to be sub 8 pounds. For example, I am running a Satio 125 on a MoAss Mojo at under 6 pounds. It has foamy power.