Most of the above info is correct, but let me clear up a few details on the CC340.

It is an engine that was developed for and certified to ASTM standards for LSA aircraft. Weight reduction took priority over power, but power was important as well. ECI makes most of the components, but CC makes the sump, and induction system, and all CC340s come with dual Plasma III Light Speed ignitions systems. The engines are assembled and test run at Aero Sport Power in B.C. They weigh about 43Lbs less than an equivalent Lyc O360A3A.
I believe you can have an engine builder such as Americas, or Aero Sport build the ECI 340 kit in many different configurations, but the CC340 is a 9,1 to 1 compression ratio engine with MA4SPA carb. There are no gears in the accessory case to drive such things as fuel pumps, or vacuum pumps since they are not needed in an LSA Cub, and these gears have WEIGHT. (and cost money, and fail occasionally, etc). The CC340 was run in a test cell at ECI for the certification and came out with a 2400 hr TBO.
The engines are very efficient with the slightly higher compression and electronic ignition. It is not uncommon (at altitude) to get 120 MPH on 6 GPH, or 20MPG. That is hard to do in a Cub type airplane.
ECI is a great progressive company that is continuing to work to lighten up these engines we all know and love.
