This is a subtle change in the inside of the pump housing.
Strangely enough this wall is about twice as thick in this area.
There are some external differences as well. Another bolt
boss and another small hose barb to return coolant from the turbo.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org