X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 15 Dec 2005 00:57:53 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d05.mx.aol.com ([205.188.157.37] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 882580 for lml@lancaironline.net; Wed, 14 Dec 2005 19:00:55 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.37; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d05.mx.aol.com (mail_out_v38_r6.3.) id q.234.3af0f95 (4410) for ; Wed, 14 Dec 2005 19:00:08 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <234.3af0f95.30d20c08@aol.com> X-Original-Date: Wed, 14 Dec 2005 19:00:08 EST Subject: Re: [LML] Re: Air filters X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1134604808" X-Mailer: 9.0 Security Edition for Windows sub 5300 X-Spam-Flag: NO -------------------------------1134604808 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/14/2005 11:39:09 A.M. Central Standard Time, REHBINC@aol.com writes: This is a bit nit picky, but I think your 4 cylinder engine probably draws two cylinders of air, 2 compressions, 2 combustions and 2 exhaust events per revolution rather than just one. Rob, Come on, cut it out! I was wrong again. I forgot that a piston goes up AND down during one revolution. So, you are right again. Now that changes the correction to the last email. Finally: For a 4 cylinder aircraft engine each 1/2 revolution has 1 cylinder drawing in air, 1 compressing air, 1 firing and 1 exhausting combustion products. Thus, 1 revolution consumes 1/2 x 360 cubic inches or 180 ci or .0521cubic feet. At 2700 rpm and WOT, that's 2700 x .0521 cf or 282 cfm. Lbs/Hr depends on air density. I hope Angier's head isn't spinning by now. At least the K&N calculation would have given him what he needed for sizing the filter. Rob, please check this for any more errors. Scott -------------------------------1134604808 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 12/14/2005 11:39:09 A.M. Central Standard Time,=20 REHBINC@aol.com writes:

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

This is a bit nit picky, but I think your 4 cylinder engine probably=20 draws two cylinders of air, 2 compressions, 2 combustions and 2 exhaust ev= ents=20 per revolution rather than just one.

Rob,

Come on, cut it out! I was wrong again. I forgot that a pis= ton=20 goes up AND down during one revolution. So, you are right=20 again.

Now that changes the correction to the last email.

Finally:

For a 4 cylinder aircraft engine each 1/2 revolution has 1 cylinder dra= wing=20 in air, 1 compressing air, 1 firing and 1 exhausting combustion=20 products. Thus, 1 revolution consumes 1/2 x 360 cubic inches or 180 ci= or=20 .0521cubic feet. At 2700 rpm and WOT, that's 2700 x .0521 cf or 282=20 cfm. Lbs/Hr depends on air density.

I hope Angier's head isn't spinning by now. At least the K&N=20 calculation would have given him what he needed for sizing the filter.

Rob, please check this for any more errors.

Scott

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