X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 14 Apr 2006 15:56:44 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-junco.atl.sa.earthlink.net ([209.86.89.63] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1068463 for lml@lancaironline.net; Fri, 14 Apr 2006 11:37:34 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.63; envelope-from=rtitsworth@mindspring.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=mindspring.com; b=HefGCj0aLo9Op9d9Eg1ZBzETGXtPWdSp3r5WRnZLnhPL/f3vzJl8v5UAhsrGllBy; h=Received:Reply-To:From:To:Subject:Date:MIME-Version:Content-Type:X-Mailer:In-Reply-To:Thread-Index:X-MimeOLE:Message-ID:X-ELNK-Trace:X-Originating-IP; Received: from [72.245.36.12] (helo=RDTVAIO) by elasmtp-junco.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1FUQLp-00007u-9F for lml@lancaironline.net; Fri, 14 Apr 2006 11:36:49 -0400 Reply-To: From: "richard titsworth" X-Original-To: "'Lancair Mailing List'" Subject: TSIO-550 Turbo setup for non-pressurizedLlancairs X-Original-Date: Fri, 14 Apr 2006 11:36:44 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01C65FB7.B5379350" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: Thread-Index: AcZfda3mAZBkIHl1T4yfQH3NoMAgwgAXuNsA X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Original-Message-ID: X-ELNK-Trace: b17f11247b2ac8f0a79dc4b33984cbaa0a9da525759e2654079861731f9bfab1b582534fda65db5a350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 72.245.36.12 This is a multi-part message in MIME format. ------=_NextPart_000_0003_01C65FB7.B5379350 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Looking for insight/experience/suggestions.. I'm building an un-pressurized ES with a TSIO-550E. I would like to put 8.5:1 pistons in it and run with 30-32"'ish MP. Goal: Similar (350'ish) HP with cooler CHT's and perhaps slightly better economy. In this arrangement, I do not believe I need all the air the standard turbos are capable of delivering. The standard turbos appear pretty "tight" with an A/R (area/radius) Ratio of 0.5 - which creates relatively high exhaust back pressure and otherwise robs economy when not WOT. Since, I do not need bleed air for the cabin and am targeting lower max boost, I'm thinking I might replace the standard turbos for new turbos with a "looser" (higher) A/R ratio. Perhaps around 1.0 or 2.0 I'd like to still maintain capability to deliver 32" to 25,000 ft. Any suggestion on turbo sizing? With the "looser" turbos, I might also be able to reduce and/or remove the sonic nozzles (which are theoretically an efficiency loss for an un-pressurized bird). I'm looking for more information relative to turbo surging with higher A/R ratios (and the sonic nozzles plugged). With reduced and/or removed sonic nozzles, I'll also need an exhaust muff for heat. While, I'm not a fan of exhaust muffs due to potential CO fumes, the capability for ground/descent heat in Michigan is a bonus (since bleed air is not hot when MP<29"). Any suggestions on sources/designs for exhaust muffs for TSIO-550's? I have read lots of old archived messages here regarding related topics - but thought I'd open it up for a current discussion. Rick Titsworth rtitsworth@mindspring.com 313-506-5604 p.s. I saw a IV @ SNF with the sonic nozzles plugged (Jeff Hickman?). It looked to have A/R=1.0 turbos, but was difficult to see with the lower cowl on. ------=_NextPart_000_0003_01C65FB7.B5379350 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Looking for = insight/experience/suggestions….

 

I’m building an = un-pressurized ES with a TSIO-550E.

 

I would like to put 8.5:1 pistons = in it and run with 30-32”’ish MP.  Goal: Similar = (350’ish) HP with cooler CHT’s and perhaps slightly better = economy.

 

In this arrangement, I do not = believe I need all the air the standard turbos are capable of = delivering.

 

The standard turbos appear pretty = “tight” with an A/R (area/radius) Ratio of 0.5 – which creates relatively = high exhaust back pressure and otherwise robs economy when not = WOT.

 

Since, I do not need bleed air for = the cabin and am targeting lower max boost, I’m thinking I might = replace the standard turbos for new turbos with a “looser” (higher) A/R = ratio.  Perhaps around 1.0 or 2.0

 

I’d like to still maintain = capability to deliver 32” to 25,000 ft.  Any suggestion on turbo = sizing?

 

With the “looser” = turbos, I might also be able to reduce and/or remove the sonic nozzles (which are = theoretically an efficiency loss for an un-pressurized bird).  I’m looking = for more information relative to turbo surging with higher A/R ratios (and = the sonic nozzles plugged).

 

With reduced and/or removed sonic = nozzles, I’ll also need an exhaust muff for heat.  While, I’m = not a fan of exhaust muffs due to potential CO fumes, the capability for = ground/descent heat in Michigan is a bonus (since bleed air is not hot when = MP<29”).  Any suggestions on sources/designs for exhaust muffs for = TSIO-550’s?

 

I have read lots of old archived = messages here regarding related topics – but thought I’d open it up = for a current discussion.

 

Rick = Titsworth

rtitsworth@mindsp= ring.com

313-506-5604

 

p.s. I saw a IV @ SNF with the = sonic nozzles plugged (Jeff Hickman?).  It looked to have A/R=3D1.0 = turbos, but was difficult to see with the lower cowl = on.

 

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