Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 339952 for flyrotary@lancaironline.net; Fri, 30 Jul 2004 15:32:05 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040730193135.DTLP1756.imf24aec.mail.bellsouth.net@rd> for ; Fri, 30 Jul 2004 15:31:35 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Turbo and the EC2 Date: Fri, 30 Jul 2004 14:31:56 -0500 Message-ID: <019601c4766b$dfd912a0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0197_01C47641.F7030AA0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_0197_01C47641.F7030AA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I'm hearing from Leon that the ignition timing in general, and specifically the timing split between leading and trailing is CRITICAL to turbo installations. I "think" Tracy is retarding the ignition with boost, but I don't know how much. The aftermarket computer that I had on my FD allowed you to change anything you wanted wrt timing or fuel. I didn't mess with the timing much, but recall that the rule was to never have a negative split under boost. In other words, never have the trailing fire before the leading. I think the guys who need to worry about exactly what split to run, are also the guys who are making 500+ HP out of a 13B. I suspect that Tracy's 0 split will be perfectly fine for our needs, assuming the turbo can be kept under control. I also don't see any better option than the EC-2 for turbo use, in fact, I think it's just dandy. Cheers, Rusty (Where would rotary aviation be without Tracy?) ------=_NextPart_000_0197_01C47641.F7030AA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
I'm hearing=20 from Leon that the ignition timing in general, and specifically the = timing split=20 between leading and trailing is CRITICAL to turbo installations.  I = "think"=20 Tracy is retarding the ignition with boost, but I don't know how = much. 
 
The = aftermarket computer=20 that I had on my FD allowed you to change anything you wanted wrt = timing or=20 fuel.  I didn't mess with the timing much, but recall that=20 the rule was to never have a negative split under boost.  In = other=20 words, never have the trailing fire before the leading.  I = think the=20 guys who need to worry about exactly what split to run, are also = the guys=20 who are making 500+ HP out of a=20 13B.  
 
I suspect that = Tracy's 0=20 split will be perfectly fine for our needs, assuming the turbo can be = kept under=20 control.  I also don't see any better option than the EC-2 for = turbo use,=20 in fact, I think it's just dandy. =20    
 
Cheers,
Rusty (Where would rotary = aviation be=20 without Tracy?)
 
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