X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 920149 for flyrotary@lancaironline.net; Tue, 10 Jan 2006 09:40:30 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=atlasyts@bellsouth.net Received: from ibm62aec.bellsouth.net ([68.213.226.209]) by imf20aec.mail.bellsouth.net with ESMTP id <20060110143939.HUOL28002.imf20aec.mail.bellsouth.net@ibm62aec.bellsouth.net> for ; Tue, 10 Jan 2006 09:39:39 -0500 Received: from [192.168.0.103] (really [68.213.226.209]) by ibm62aec.bellsouth.net with ESMTP id <20060110143939.JKWD9476.ibm62aec.bellsouth.net@[192.168.0.103]> for ; Tue, 10 Jan 2006 09:39:39 -0500 Mime-Version: 1.0 (Apple Message framework v746.2) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1--317011690 Message-Id: <5593566D-01BE-45A4-84C3-DFF9EB3A8894@bellsouth.net> From: Buly Subject: Re: [FlyRotary] Re: Runaway Turbos Date: Tue, 10 Jan 2006 09:39:38 -0500 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.746.2) --Apple-Mail-1--317011690 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Thanks Barry, When I send my drive shaft to Tracy for "Technical Adjustments" I will do something to relieve the high pressure on the turbine. Buly On Jan 10, 2006, at 8:50 AM, Barry Gardner wrote: > Buly, > > I can only echo what Rusty said about "danger, danger." You've got > runaway boost, irrespective of the fact that you removed the > wastegate. The wastegate size is not sufficient to get rid of all > the boost you're producing. That boost past 30" MP makes the turbo > go even faster, which feeds back even more to the insufficient > wastegate--it's a recursive cycle that takes you to that very high > boost level very quickly. All the racer boys working with the stock > turbo complain about it. > > All that boost requires tons of fuel. Think .65 BSFC, guess what > horsepower you're producing at that boost level and figure out how > much fuel you need to deliver. Then re-check all your bottlenecks: > fuel injector sizes, fuel pressure, pump sizes, fuel computer > programming, everything, > > You need to be able to control that boost, friend. It could go > uncontrollably lean on you and.... > > The symptoms all tell the same story. > > Barry Gardner > Wheaton, IL --Apple-Mail-1--317011690 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1

Thanks = Barry,

When I send my drive shaft to Tracy for "Technical = Adjustments" I will do something to relieve the high pressure on the = turbine.

Buly

On Jan = 10, 2006, at 8:50 AM, Barry Gardner wrote:

Buly,

I can only echo what Rusty said about "danger, danger." = You've got runaway boost, irrespective of the fact that you removed the = wastegate. The wastegate size is not sufficient to get rid of all the = boost you're producing. That boost past 30" MP makes the turbo go even = faster, which feeds back even more to the insufficient wastegate--it's a = recursive cycle that takes you to that very high boost level very = quickly. All the racer boys working with the stock turbo complain about = it.=A0

All that boost requires tons of fuel. Think .65 BSFC, guess = what horsepower you're producing at that boost level and figure out how = much fuel you need to deliver. Then re-check all your bottlenecks: fuel = injector sizes, fuel pressure, pump sizes, fuel computer programming, = everything,=A0
=

You need to be able to control that boost, friend. It could = go uncontrollably lean on you and....

The = symptoms all tell the same story.

=
Barry Gardner

Wheaton, IL
=

= --Apple-Mail-1--317011690--