Mark Steitle wrote:

Paul,
It appears that the new Renesis water pump housing has a lower profile than the 13B or 20B.  Also, the flow exits on the side rather on top.  Does anyone on the list know if will fit on a 13b or 20b?
On a slightly different note... I compared the 13b water pump impeller with my 20b impeller.  The 20b is the same height but about 1/8" larger diameter.  It appears that the 20b impeller could be installed on the 13b housing assy with minor modificaitons.  This may help some 13b people to increase pump gpm.  (I'm making the assumption that larger diameter equals more flow).  Just a thought.

Paul Lamar responded:

Well it might be but I am not sure it is any different than the third gen water pump.
 As I recall it is driven off the back (flat) side of the serpentine belt.

The Renesis photo shows the water pump being driven from the same side of the belt as the alternator; presumably this is the front side of the belt (especially since the visible side has no ridges, implying the back side is visible).

Russell Kent

I think you are right Russell. My mind is playing tricks on me.
I think I saw that on the Leman four rotor and not on the RX8. 
After looking at the 4 rotor picture again it is merely an idler.

Paul Lamar

The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org