Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 3222286 for flyrotary@lancaironline.net; Sat, 08 May 2004 20:46:55 -0400 Received: from rad ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040509004655.MELQ17707.imf24aec.mail.bellsouth.net@rad> for ; Sat, 8 May 2004 20:46:55 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Surging Fixed Date: Sat, 8 May 2004 19:46:56 -0500 Message-ID: <009801c4355f$2125b0e0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0099_01C43535.384FA8E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0099_01C43535.384FA8E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I think the most important thing that I changed was the injector = staging. Because my injectors are different sizes (550cc stock turbo and 52lb/hr = TWMs that rusty tested and said they don't even flow that well)=20 I had the MSD / Rochester (sold by TWM) injectors tested, and they = flowed exactly what they were supposed to, as did the stock Mazda injectors. = At the time, I couldn't come up with an explanation of why they seemed to = be so lean compared to the stock injectors. =20 Well, now that I've had some time to think about, and some experience = with distantly placed injectors, I believe it wasn't the injectors fault, so = much as the fact that the MSD injectors were about 14 inches away from the = port, around a few turns. I'm really beginning to believe that fuel must be injected close to the port to get the best efficiency. Sigh... a new = intake is becoming a high priority task. Glad you're running better now. Rusty (no joy in climbville) =20 ------=_NextPart_000_0099_01C43535.384FA8E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

I think the most important thing that I changed was = the injector=20 staging.  Because my injectors are different sizes (550cc stock = turbo and=20 52lb/hr TWMs that rusty tested and said they don't even flow that well)=20

I had the MSD / Rochester (sold by = TWM)=20 injectors tested, and they flowed exactly what they were supposed = to, as=20 did the stock Mazda injectors.  At the time, I couldn't come = up with=20 an explanation of why they seemed to be so lean compared to the = stock=20 injectors. 

Well, now that I've had some time = to think=20 about, and some experience with distantly placed injectors, I believe it = wasn't=20 the injectors fault, so much as the fact that the MSD injectors were = about 14=20 inches away from the port, around a few turns.  I'm really = beginning to=20 believe that fuel must be injected close to the port to get the best=20 efficiency.  Sigh... a new intake is becoming a high priority=20 task.

Glad you're running better = now.

Rusty (no joy in climbville)  =

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