Joe, I have read articles that indicates the insert is indeed made of very tough material - would just about have to be, to live in that environment. Stories I have read indicated you could (with considerable effort and carbide bit tools) grind out the insert.
However, I would suggest that you could save yourself a lot of effort by using turbo housings. I have ported in intakes, but shied away from trying to port the exhaust as that is where the apex seal encounters its toughest test - Hot exhaust gases across it and little support as the normally supporting rotor housing wall is of course missing at the exhaust port.
But that is just my 0.02 worth
Ed
----- Original Message -----
Sent: Sunday, May 13, 2007 8:31 AM
Subject: [FlyRotary] Exhaust insert
What type of material is the insert for the exhaust port found in the 2nd gen motors made from? Is it removable? How could one enlarge the exhaust port? Do you just use a turbo housing? Thanks
Joe Berki