X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail12.syd.optusnet.com.au ([211.29.132.193] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTPS id 2193187 for flyrotary@lancaironline.net; Sun, 22 Jul 2007 17:11:41 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.193; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-107-198.dsl.nsw.optusnet.com.au [211.31.107.198]) by mail12.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id l6MLAu5T013658 for ; Mon, 23 Jul 2007 07:10:58 +1000 Message-ID: <000e01c7cca4$d06ac6f0$c66b1fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: carbs vs efi Date: Mon, 23 Jul 2007 07:11:02 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01C7CCF8.A0B60E70" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C7CCF8.A0B60E70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Does anyone know the IO/IC and size and HP of the factory P-port. Lynn, does the timing given, calculated by the rotor uncovering and = covering the port, or the side seal uncovering/covering the port = opening? I was thinking the RX8 rotor will be slightly different (bigger) = with the harased edges. George ( down under) I only have 12A stuff, but here you are: Intake port at the manifold. 1.695" Round Exhaust port at the manifold 1.645" Round IO 86 Degrees BTDC IC 75 Degrees ABDC EO 73 Degrees BBDC EC 65 Degrees ATDC A Racing Beat Street Port: IO 25 Degrees ATDC IC 60 Degrees ABDC EO 84 Degrees BBDC EC 48 Degrees ATDC In side port engines, it is the rotor closing the port. In the peripheral port engines it is the apex seal closing the port. = Actually the port is timed by the apex seal. The port never closes in the way the side port engine has the rotor = blank off the port in operation.=20 So, the Pport can flow way more than the side port, even with smaller = runners and ports.=20 Lynn E. Hanover Lynn, That Factory P-port, is it a 12A, and if so are there factory 13B = P-ports? George (down under) -------------------------------------------------------------------------= ----- Get a sneak peek of the all-new AOL.com. ------=_NextPart_000_000B_01C7CCF8.A0B60E70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Does anyone know the IO/IC and size and HP of = the factory=20 P-port.

Lynn, does the timing given, = calculated by the=20 rotor uncovering and covering the port, or the side seal = uncovering/covering=20 the port opening?

I was thinking the RX8 rotor will = be slightly=20 different (bigger) with the harased edges.

George ( down=20 under)

I only have 12A stuff, but here you are:

Intake port at the manifold. 1.695" Round

Exhaust port at the manifold 1.645" Round

IO 86 Degrees BTDC

IC 75 Degrees ABDC

EO 73 Degrees BBDC

EC 65 Degrees ATDC

A Racing Beat Street Port:

IO 25 Degrees ATDC

IC 60 Degrees ABDC

EO 84 Degrees BBDC

EC 48 Degrees ATDC

In side port engines, it is the rotor closing the port.

In the peripheral port engines it is the apex seal closing the = port.=20 Actually the port is timed by the apex seal.

The port never closes in the way the side port engine has the = rotor blank=20 off the port in operation.

So, the Pport can flow way more than the side port, even with = smaller=20 runners and ports.

Lynn E. Hanover

Lynn,

That Factory P-port, is it a 12A, and if so are there factory 13B = P-ports?

George (down under)

Get a sneak peek of the all-new AOL.com.

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