>         > >  >         Marc Wiese wrote:

         > >>          >
         > >>          > >>>I just recieved two new rotors from
M-comp, and to my
         > >>surprise there
         > >>          > was a slight shoulder on the rotor sides where it
         > >>appears Mazda now
         > >>          > mills the rotors down by ~.002" to reduce
the width.  Perhaps to
         > >>          > compensate for E-shaft flex.  I've never
seen this on any of the
         > >>          > original rotors I've inspected.
         > >>          >
         > >>          > This is interesting to me because I had planned on
         > >>having the rotors
         > >>          > milled down ~.004" on each side to increase the
         > >>clearance, so now I'm
         > >>          > tempted to just have the milling start at
that shoulder
         > >>vs: all the
         > >>          > way at the outter oil control ring journal.<<<
         > >>          >
         > >>          > Marc Wiese
         > >>
         > >
         > >Jean Fouche wrote:
         > >>
         > >>  How about a pic of the rotor sides?

         >    Ken welter wrote
         >
         >    Here is a photo of what I do,
         >   I start at the tip at .015" and taper it off to zero where the
         > bluing line is, this is what Rob Golden at pineapple
racing suggested
         > to do, he has been a great help to me and I don't think
I will ever
         > be able to pay him back for all the info he has shared.
         >   Ken Welter

Jean Fouche wrote:

 Forgive my ignorance, but will this engine be used for high
revolution applications? I am quite fascinated by what you are
doing. It makes perfect sense for a high horsepower application.
Are you having the eccentric shaft clearanced as well?

 Jean Fouche

Ken uses nitrous oxide to get his 2900 pound, 300 HP 13B powered
amphibious Coot up on the step and out of the water.

Paul Lamar

    I had scuffing on the side housings and this is why I did this,
   Also I cruise this plane at 6500 rpm as it is a big one 3100 lb gross weight,
  I think the rpm is the reason for the scuffing but I have not seen
any ill effects at low rpm so I would do it on any engine as it is
cheap insurance.
  Ken

 
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