What would be the best engine choice for the DP extra .I am runing a moki 1.8 and I dont think its going to have the power i need at my elevation wich is 4200ft. I am still going to try some differnt props but I dont think it wiil help. what would really give me massave power , MOKI 2.1, or should i go with GAS, 50 cc and how will it fet in the plane. would GAS be to heavy.

I think gas is too heavy. I would definitely go with the 2.1 at your elevation. I think the 1.8 moki is plenty of power for lower elevations but for you, the 2.1 with a 20x8 bambula is the setup.

www.3dbatix.com ... check out the Dave Patrick 330l videos, hes using a Moki 2.1

I have seen the video but my problem is my elevation its 4500ft.
Does any one have DP at this elevation. I am goig to try different props like 20/6 will sea what happins with the bambula this week end. It won't flat spin it least not real flat but I only have 6 flights on it and I am still move my cg back.

would a moki 2.1 be much differnt than the 1.8 . the 1.8 must be puting out just under os close to 14lbs of thrust at 4500ft.

Well the 2.1 makes almost a 1hp more power than the 1.8, I have a Kangke fun 50 with a saito .91! it's only a 5lb airplane, but it's truly unlimited.