Ken Powell wrote:

Can we use rotary/grinding stones rather than cutters and grind out the
diffusers?  I don't think that cutters will be very effective in
removing the stainless diffusers.  I don't remember seeing the exhaust
port liners without the diffusers (from the Turbo rotor housings) as
separate items from RB or Mazdatriz, so I would like to modify the
existing parts.  Everyone building a NA engine using the rotor housings
from a 6-port engine will have this problem.

Ken Powell

I was just going to go by Rutland Tool & Supply and pick up a couple of 
small grinding burrs for my die grinder and try it on Monday. 

Paul Lamar
 
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