Return-Path: Received: from fed1rmmtao02.cox.net ([68.230.241.37] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 616306 for flyrotary@lancaironline.net; Fri, 21 Jan 2005 13:05:20 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.37; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao02.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20050121180451.VYWX17983.fed1rmmtao02.cox.net@BigAl> for ; Fri, 21 Jan 2005 13:04:51 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Pport/cold side injectors Date: Fri, 21 Jan 2005 10:04:55 -0800 Message-ID: <000501c4ffe3$b65b43b0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C4FFA0.A83803B0" 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 V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C4FFA0.A83803B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Good stuff, Ernest. On the dyno runs with my NA 20B, we ran both 92 and 87 octane. There was a very small, but noticeable improvement in performance at the high end with the 87 octane. We weren't sure that it could be attributed to octane, but maybe. This was in the range of maybe 5500 to 6500 rpm; less than "exceedingly high". Al If you're running exceedingly high RPM in a non-turbo application, LOWER octane may actually produce more power. In this situation, the higher octane stuff may still be burning well into the exhaust cylce. Now, I'm done. My brain is empty. ------=_NextPart_000_0006_01C4FFA0.A83803B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Good stuff, Ernest.

 

On the dyno runs with my NA 20B, we ran both 92 and = 87 octane.  There was a very small, but noticeable improvement in = performance at the high end with the 87 octane. We weren’t sure that it could = be attributed to octane, but maybe.  This was in the range of maybe 5500 to 6500 = rpm; less than “exceedingly high”.

 

Al

 

 

 If you're running exceedingly high RPM in a non-turbo

application, LOWER octane may actually produce more power.  In = this

situation, the higher octane stuff may still be burning well into = the

exhaust cylce.

 

Now, I'm done.  My brain is empty.

 

 

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