I’m building a Cozy MK IV.  While I’m early in my build I realize the need to figure out what I’m going to do on an engine before I go much further.  My options are rotary and O540/IO540.  I live in the high mountain deserts of northern New Mexico (Santa Fe) so density altitude is always an issue (Elevation is 6348).

 

So the need for power is an issue.  I also plan on cross countries being my main mode of flying, meaning higher cruise speeds are important.

 

I know there are many variables and it’s difficult to make generalizations but I’m trying to figure out the horse power ratings of the 20B & Renesis as well as their installed weight.  The reason I need to figure it out now is if I go the 540 route I’ll need to do a stretch to the fuse to offset the weight diff.  Will I need a similar stretch for the Renesis or 20B?  Will they meet an acceptable horsepower range, non-turbo’d?

 

Thanks,

 

Bob