Radiusing these edges will double the flow. Well known fluid
dynamic fact.

Also drilling them out just a little will increase
the area a lot.

Paul Lamar

Here is what I have in mind. Making a new back cover and moving the 
3 inch exhaust pipe over to the waste gate side should allow the waste 
gate to open to 90 degrees. This is simple to make.

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.