Return-Path: Received: from fed1mtao03.cox.net ([68.6.19.242] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2577953 for flyrotary@lancaironline.net; Sat, 13 Sep 2003 01:54:25 -0400 Received: from Leonards ([68.111.228.182]) by fed1mtao03.cox.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20030913055418.QJIP22020.fed1mtao03.cox.net@Leonards> for ; Sat, 13 Sep 2003 01:54:18 -0400 From: "David Leonard" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: turbo wastegate requirements Date: Fri, 12 Sep 2003 22:54:25 -0700 Message-ID: <000901c379bb$7cc275b0$b6e46f44@Leonards> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01C37980.D0639DB0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C37980.D0639DB0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit > I really wish I knew how much boost the 9.7 rotors would tolerate. If 6 psi is safe, then I'd be tempted to just set the relief valve there, and try to adjust the throttle for 5 psi. I just asked my engine guy (Japtrix) this question. He feels that the engine (9.7 rotors) will be fully protected with a 6psi popoff valve and the stock wastegate. He seems to think that manual wastegate control is unnecessary. He once drove an RX7 up a 12,000ft mountain in Peru. As they neared the top he felt the boost drop off. It came back as they came back down the other side. For what it's worth. John Slade John, that makes sense as the stock wastgate control is reference to ambient (i.e. procuces a fixed amount of boost above ambient - about 5-6 psi). That is why I also think it is an excellent choice to protect both the turbo and the engine. However, if you really want to get some power.. :-) David Leonard The Rotary Roster: http://members.aol.com/_ht_a/rotaryroster/index.html ------=_NextPart_000_000A_01C37980.D0639DB0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

 

 

 

 > I really wish I knew how much = boost the 9.7 rotors would tolerate.  If 6 psi is safe, then I'd be tempted = to just set the relief valve there, and try to adjust the throttle for 5 = psi.   

I just asked my engine guy = (Japtrix) this question. He feels that the engine (9.7 rotors) will be fully protected = with a 6psi popoff valve and the stock wastegate.  He seems to think that manual wastegate control is unnecessary. He once drove an RX7 = up a 12,000ft mountain in Peru. As they = neared the top he felt the boost drop off. It came back as they came back down the = other side.

For what it's = worth.

John Slade

 

John, that makes sense as the stock wastgate control is reference to ambient (i.e. procuces a fixed amount = of boost above ambient  - about 5-6 psi).  That is why I also think it = is an excellent choice to protect both the turbo and the engine.  = However,  if you really want to get some power….  J

 

 

David Leonard

The Rotary = Roster:

http://memb= ers.aol.com/_ht_a/rotaryroster/index.html

 

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