>
    > Paul, et al;
    > I'm getting ready to bore some holes in rotor housings for a P-Port
    > and
    > wonder if I can locate the port opening position for the P-Port by
    > measuring
    > the relative location of the existing side port opening positions.
    > I.e. if
    > the side port opening position is at 80deg BTDC then can I just
    > measure the
    > same distance up from the bottom of the rotor housing for the
    > bottom of the
    > P-Port opening?
    >
    > Thanx,
    > Joe Hull
    > Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)
    > Redmond (Seattle), Washington
    >
    >
    > As I recall it is 8.64 inches up to the center of the hole
    > from the bottom of the rotor housings. I scaled it off this
    > drawing of the Lemans engine.
    >
    > I used an angle plate and made the bore perpendicular to
    > the vertical center line of the rotor housing.
    >
    > I recently updated the web site on this subject so look it
    > over and if you need more info or pictures let
    > me know.
    >
    > --http://www.rotaryeng.net/intake.html
    >
    >
    > I started with a 1 inch drill and then used a 1.5 inch shell cutter
    > with the final cut using a boring bar.
    >
    > You will need to make a slide throttle as well.
    > I have not heard from Tom Weber lately so I don't
    > know if you can still get one from him. They are easy to make
    > anyway. Let me know if you need a drawing for that.
    >
    >
    > Paul Lamar ...No rotor no motor.
    >
    > Also Joe get a junk rotor housing from Hayes or Atkins to
    > practice on. And pot it with JB Weld before you drill and bore.
    > Mazdatrix sells it in the large size for about $16. You will
    > need two sets.
    >
    > Paul Lamar

     Paul, just to jog your memory,it was  Joy (my wife) and I that
   determined the Mazda p port port size and timing by scanning the
   drawings published by Mazda into Photo Shop and from there into Page
   Maker where we used precise lay out tools to get the measurements
   which we then published on ACRE.   Regards,  Jerry


   Sorry! I think you are right. I double checked however
   using my hangar neighbors Anvil and his big plotter:)

   Paul Lamar ...No rotor no motor.

Hi Jerry (you're the Tailwind guy, right?),

How's the Tailwind going?  Still making a single seat version??


Regards,

Matt-


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