X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf18aec.mail.bellsouth.net ([205.152.59.66] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 936478 for flyrotary@lancaironline.net; Sun, 08 May 2005 12:00:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.66; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf18aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050508155940.NGHV2152.imf18aec.mail.bellsouth.net@rd> for ; Sun, 8 May 2005 11:59:40 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "Flyrotary List" Subject: 4-port intake measurements Date: Sun, 8 May 2005 10:59:44 -0500 Message-ID: <000001c553e6$f4063c40$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C553BD.0B303440" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C553BD.0B303440 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Greetings, =20 I brought a 4 port intake gasket home, since these are a very good match = to my current ports, and did some measuring of areas. The port holes are elongated circles, and were calculated that way. =20 =20 Secondary- 1.5" tall x 1.125" wide. This gives a 1.125" circle equal to = .99 sq in, and a rectangular area of .375" x 1.25" equaling .42 sq in. = Total area for one secondary port is 1.41 sq in. This would equal a round = tube with the a 1.34" ID. =20 Primary- 1.5625 tall x .75" wide. This gives a .75" circle equal to .44 = sq in, and a rectangular area of .8125" x .75" equal to .61 sq in. Total = area for one primary is 1.05 sq in. . This would equal a round tube with = the a 1.16" ID. =20 The total area for a combined primary and secondary is 2.46 sq in. My current 1.625" ID tubing only has an area of 2.07 sq in, meaning it's = 16% smaller than the runners in the side of the housing. A combined runner would require at least a 1.77" ID tube to feed the primary and secondary = of one rotor.=20 =20 I'm looking into making a "simple" style intake like Tracy, and Bruce = are doing, though I haven't committed to any particular design. =20 =20 Cheers, Rusty =20 ------=_NextPart_000_0001_01C553BD.0B303440 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Greetings,
 

I = brought a 4=20 port intake gasket home, since these are a very good match to my current = ports, and did some measuring of = areas.  The port holes are = elongated=20 circles, and were calculated that way. =20

 

Secondary- 1.5”=20 tall x 1.125” wide.  = This gives a=20 1.125” circle equal to .99 sq in, and a rectangular area of = .375” x 1.25”=20 equaling .42 sq in.   = Total=20 area for one secondary port is 1.41 sq in. =20 This would equal a round tube with the a 1.34” = ID.

 

Primary- 1.5625=20 tall x .75” wide.  = This gives a .75”=20 circle equal to .44 sq in, and a rectangular area of  .8125” x .75” = equal to .61 sq in.  Total area for one primary is = 1.05 sq=20 in.  .  This would equal a round tube = with the a=20 1.16” ID.

 

The total area=20 for a combined primary and secondary is 2.46 sq in.  My current 1.625” ID = tubing only has an=20 area of 2.07 sq in, meaning it’s 16% smaller than the runners in = the side of the=20 housing.  A combined = runner would=20 require at least a 1.77” ID tube to feed the primary and secondary = of one=20 rotor. 

 

I'm=20 looking into making a "simple" style intake like Tracy, and Bruce = are=20 doing, though I haven't committed to any particular=20 design.  

 

Cheers,

=

Rusty=20  

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