X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-px0-f180.google.com ([209.85.212.180] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4249286 for flyrotary@lancaironline.net; Wed, 05 May 2010 21:53:28 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.212.180; envelope-from=archerwt@gmail.com Received: by pxi17 with SMTP id 17so184591pxi.25 for ; Wed, 05 May 2010 18:52:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:in-reply-to:subject :date:message-id:mime-version:content-type:x-priority :x-msmail-priority:x-mailer:thread-index:importance:x-mimeole; bh=UEx6OUjt8bhGSUzGvFpDIoAh4cUB4ArMQY6eLSwe8uM=; b=r1FYncXu2luT8sWF+JKf/8Via+4wNm72kB3d15zmOS7mTfhXbFXi1MdEdwuRuE2ZOR uGWV9cfFUTqNVlXC+pBLW0BOdrcW2y+qBDjWS8oHoJpdsUXuU2/PrQt5wrqQQf/gYnu7 uOUYZMeuQThw+f/S2UF293EnyCtklKTB+CJCc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:in-reply-to:subject:date:message-id:mime-version :content-type:x-priority:x-msmail-priority:x-mailer:thread-index :importance:x-mimeole; b=iR35Vi8wUXGdb2dxsYqsaSkA6dfTc1q85xyEZ+InaTmx2Jg11aaNrXUPwF55vfc/HE coaryNlQWHaTb6dt6e7cCwelTP6CI6+5B8mGXw5o/dQJuGAaoh/e+TGopbxFY2uz96yH sJ48O5UwXOxogYJIDb0hWViEMWNUjzqCJUdp4= Received: by 10.141.88.6 with SMTP id q6mr6281646rvl.218.1273110772569; Wed, 05 May 2010 18:52:52 -0700 (PDT) Return-Path: Received: from kitchen (ppp-71-128-204-98.dsl.sndg02.pacbell.net [71.128.204.98]) by mx.google.com with ESMTPS id k17sm227599rvh.17.2010.05.05.18.52.51 (version=SSLv3 cipher=RC4-MD5); Wed, 05 May 2010 18:52:52 -0700 (PDT) From: "Todd Archer" To: "'Rotary motors in aircraft'" In-Reply-To: Subject: Gravity Feed Date: Wed, 5 May 2010 18:52:47 -0700 Message-ID: <1CE6436915F54767812CB46500E44F17@kitchen> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01CAEC84.283FABA0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 thread-index: Acri82tiWZWWYTcASFy5tMNN6coFLQJypSyA Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18005 This is a multi-part message in MIME format. ------=_NextPart_000_0013_01CAEC84.283FABA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Anyone who knows feel free to explain to me why a Marvel-Schebler updraft can feed 300 hp with gravity but pumps are needed for Webers or Holleys. I understand the updraft gets another 18" of pressure but am assuming it is simply by design that the response is improved with a few lbs of pressure. Since we aren't too worried about throttle response as long as it doesn't stumble, would a gravity-fed Holley be a waste of time? Todd ------=_NextPart_000_0013_01CAEC84.283FABA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Anyone who knows feel free to explain to me = why a Marvel-Schebler updraft can feed 300 hp with gravity but pumps are = needed for Webers or Holleys. I understand the updraft gets another 18” of = pressure but am assuming it is simply by design that the response is improved = with a few lbs of pressure. Since we aren’t too worried about throttle response as long as it doesn’t stumble, would a gravity-fed Holley = be a waste of time?

Todd

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