From: "Todd Archer" <flyrotary@lancaironline.net>
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Subject: Fwd: Re: [FlyRotary] Re: 3-generation Template Source
References: <876e1595-4170-d610-e8ad-9c285fa6330c@gmail.com>
To: ACRE <flyrotary@lancaironline.net>
Message-ID: <c7605486-ccce-2cc0-786c-112d91e35614@gmail.com>
Date: Mon, 6 Feb 2017 09:38:41 -0900
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Not incredibly experienced with porting but have done street ports 
(side) and peripheral ports. The templates are needed for street and 
bridge ports because it ends up being an odd shape and the shape on the 
iron is all-important.  Of course, the same is true of the p-ports but 
the placement is effectively zero-dimensional.  It requires as much 
precision as can be had but it just starts with a point on the housing 
and has a specific diameter.  Assuming you are going round (instead of 
squarish) and and at 90 degrees to engine orientation, there's not much 
to the placement.  The caveat is your diameter will determine your port 
opening/closing so your placement and your diameter must both be planned.

https://www.mazdatrix.com/pictures/11023.jpg
So these are big ports milled at an angle other than 90.  On the 
outside, it starts higher that where it actually ends up inside housing 
(where it counts).  Looks to be a 2" port.

http://i254.photobucket.com/albums/hh115/fd20na/13b-re%20rew%20race%20engine%20build/DSC02923.jpg
This is a semi-pport so it continues to use the side ports, too.  This 
one obviously centered right in the middle of the casting bullseye and 
are at 90 degrees but only a 1" port.

I won't tell you where exactly to poke the hole but there are some good 
examples out there that will allow you to precisely replicate placement.

Todd


On 2/6/2017 5:58 AM, Charlie England wrote:
> Guys, I think that all those links are for side port porting; I think 
> he asked for a P-port template.
>
> Charlie


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      <div class="moz-cite-prefix">Not incredibly experienced with
        porting but have done street ports (side) and peripheral ports. 
        The templates are needed for street and bridge ports because it
        ends up being an odd shape and the shape on the iron is
        all-important.  Of course, the same is true of the p-ports but
        the placement is effectively zero-dimensional.  It requires as
        much precision as can be had but it just starts with a point on
        the housing and has a specific diameter.  Assuming you are going
        round (instead of squarish) and and at 90 degrees to engine
        orientation, there's not much to the placement.  The caveat is
        your diameter will determine your port opening/closing so your
        placement and your diameter must both be planned.  <br>
        <br>
        <a href="https://www.mazdatrix.com/pictures/11023.jpg">https://www.mazdatrix.com/pictures/11023.jpg</a><br>
        So these are big ports milled at an angle other than 90.  On the
        outside, it starts higher that where it actually ends up inside
        housing (where it counts).  Looks to be a 2" port.<br>
        <br>
        <a
href="http://i254.photobucket.com/albums/hh115/fd20na/13b-re%20rew%20race%20engine%20build/DSC02923.jpg">http://i254.photobucket.com/albums/hh115/fd20na/13b-re%20rew%20race%20engine%20build/DSC02923.jpg</a><br>
        This is a semi-pport so it continues to use the side ports,
        too.  This one obviously centered right in the middle of the
        casting bullseye and are at 90 degrees but only a 1" port.<br>
        <br>
        I won't tell you where exactly to poke the hole but there are
        some good examples out there that will allow you to precisely
        replicate placement.<br>
        <br>
        Todd<br>
        <br>
        <br>
        <br>
        <br>
        On 2/6/2017 5:58 AM, Charlie England wrote:<br>
      </div>
      <blockquote cite="mid:list-9435914@logan.com" type="cite">
        <div dir="ltr">
          <div class="gmail_extra">Guys, I think that all those links
            are for side port porting; I think he asked for a P-port
            template.</div>
          <div class="gmail_extra"><br>
          </div>
          <div class="gmail_extra">Charlie</div>
        </div>
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