Here are some pics of the single rotor RENESIS engines being built here in Australia for light aircraft and automotive use.

http://www.aerota.com/images/DSCN1924.jpg

http://www.aerota.com/images/DSCN1952.jpg

Havng the rotating assemble balanced.

http://www.aerota.com/images/DSCN2047.JPG

Full details on these engines can be found here, http://www.aerota.com

Someone stare at those end housings and see if you notice what I notice. Those look like the 6 port end housings since there are 2 intake runners but upon closer inspection there is only 1 port in the plate. Strange? I think so!

Even the 4-Port motors have a recession where the auxillary ports go in the castings. That is what you can see in the pics.

http://www.aerota.com/images/DSCN0884.JPG

I've never seen the inside of a 4 port Renesis before. They aren't even close to the old 4 port engines in terms of intake timing or location. Just a 6 port without the other 2 ports really. That severely limits any power upgrades for the 4 port engines.

Yeah but they are great for turbocharging :D