Im looking for a blueprint/layout or whatever you would like to call it for a 13b housings. There are 2 reason for this.

1. I want to machine water jacket grooves into 86 plus 13b housings. this would make it possible to use newer housings older 13b's. also, i could mill down the housings and machine in grooves to use 13b housings for 12a's. Especially nice since mazda no longer carrys or sells them...

2. A machinist friend of mine is looking to make a billet rotor housing. He is far more experienced in machining than myself, and he says from the look of it, its not that hard. But he dosnt even know what a rotary engine is... but a part is a part when it comes to machining.

 

In regards 2two, OEM rotorhousings have a steel piece inserted into the sliding surface and then its coated in a micro channel porous Chromium-Molybdenum Plating. I highly doubt they are easy to machine if doing it correctly.