X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d23.mx.aol.com ([205.188.139.137] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2192173 for flyrotary@lancaironline.net; Sun, 22 Jul 2007 01:41:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.137; envelope-from=Lehanover@aol.com Received: from Lehanover@aol.com by imo-d23.mx.aol.com (mail_out_v38_r9.2.) id q.bca.12ab58e7 (32915) for ; Sun, 22 Jul 2007 01:41:02 -0400 (EDT) From: Lehanover@aol.com Message-ID: Date: Sun, 22 Jul 2007 01:41:02 EDT Subject: Re: [FlyRotary] Re: carbs vs efi To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1185082862" X-Mailer: 9.0 Security Edition for Windows sub 5366 X-Spam-Flag: NO -------------------------------1185082862 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 7/21/2007 10:15:34 P.M. Eastern Daylight Time, lendich@optusnet.com.au writes: 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. So, the Pport can flow way more than the side port, even with smaller runners and ports. Lynn E. Hanover ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour -------------------------------1185082862 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 7/21/2007 10:15:34 P.M. Eastern Daylight Time,=20 lendich@optusnet.com.au writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

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

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

I was thinking the RX8 rotor will be slig= htly=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 bla= nk=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

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

-------------------------------1185082862--