X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ironman.mail.utexas.edu ([128.83.32.51] verified) by logan.com (CommuniGate Pro SMTP 5.1.1) with ESMTP id 1516955 for flyrotary@lancaironline.net; Tue, 31 Oct 2006 08:29:17 -0500 Received-SPF: none receiver=logan.com; client-ip=128.83.32.51; envelope-from=mark.steitle@austin.utexas.edu DomainKey-Signature: s=main; d=austin.utexas.edu; c=nofws; q=dns; b=xFJwX7uOQKQPM7aoXqLAi7ofhq3WtzCUlgIhure3VfRXGJEcbXBUHR3FY+T6ZE2ts2MFdDyTGeaxogX2JvidWAUWD9l3vEGdQ1GvZcEZ7TbM29u+gUHHIx7RJ9wXzxlNK2TdfBShiPkEE8Ey+kQILjSg9RiEZ7Y9QE/fcLETWMA=; Received: from exb01.austin.utexas.edu (HELO MAIL01.austin.utexas.edu) ([129.116.87.142]) by ironman.mail.utexas.edu with ESMTP; 31 Oct 2006 07:28:58 -0600 Received: from MAIL02.austin.utexas.edu ([129.116.87.143]) by MAIL01.austin.utexas.edu with Microsoft SMTPSVC(6.0.3790.1830); Tue, 31 Oct 2006 07:28:57 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C6FCF0.84E4A7FE" Subject: RE: [FlyRotary] Re: fuel pumps Date: Tue, 31 Oct 2006 07:28:57 -0600 Message-ID: <5B59870CA143DD408BD6279374B74C8B01D56F10@MAIL02.austin.utexas.edu> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: fuel pumps Thread-Index: Acb8qTDWflxPSJJtQMehCKg3zeo+GwARzaBg From: "Mark R Steitle" To: "Rotary motors in aircraft" Return-Path: mark.steitle@austin.utexas.edu X-OriginalArrivalTime: 31 Oct 2006 13:28:57.0858 (UTC) FILETIME=[84E4DE20:01C6FCF0] This is a multi-part message in MIME format. ------_=_NextPart_001_01C6FCF0.84E4A7FE Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dave, Someone makes an adapter for Holly carbs that allow on-the-fly mixture control. Not sure of who, but I bet a good speed shop would know. =20 Mark S. =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of david mccandless Sent: Monday, October 30, 2006 10:58 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: fuel pumps =20 =20 You just need 3.5 Psi for the Weber. Although I use 6 Psi in the race car. And some carb tricks on top of that. =20 =20 Hi Lynn,=20 do you have any ideas on methods to lean a weber, or any carb for that matter, for altitude mixture adjustment. I have heard of a vacuum line to the inlet manifold thru a needle valve to the fuel bowl, then vary the pressure head in the fuel bowl. And, jetting the carb at sea level with the choke on, and then backing off the choke as the airplane climbs.=20 Any comments or suggestions?=20 BR, Dave McC=20 ------_=_NextPart_001_01C6FCF0.84E4A7FE Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dave,

Someone makes an adapter for Holly = carbs that allow on-the-fly mixture control.  Not sure of who, but I bet = a good speed shop would know.

 

Mark = S.

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of david mccandless
Sent: Monday, October 30, = 2006 10:58 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = fuel pumps

 

 

You just need 3.5 Psi for the Weber. Although I use 6 = Psi in the race car. And some carb tricks on top of that.  =

 

Hi Lynn,

do you have any ideas on methods to lean a weber, or any carb = for that matter, for altitude mixture adjustment. I have heard of a vacuum line to the = inlet manifold thru a needle valve to the fuel bowl, then vary the pressure = head in the fuel bowl. And, jetting the carb at sea level with the choke on, and = then backing off the choke as the airplane climbs. =

Any comments or suggestions?

BR, Dave McC

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