Return-Path: <13brv3@bellsouth.net> Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2561010 for flyrotary@lancaironline.net; Thu, 28 Aug 2003 14:59:35 -0400 Received: from rad ([68.212.14.21]) by imf17aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030828185934.LJOW17943.imf17aec.mail.bellsouth.net@rad> for ; Thu, 28 Aug 2003 14:59:34 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: MSD injector test results Date: Thu, 28 Aug 2003 13:59:35 -0500 Message-ID: <000001c36d96$85dc5fc0$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C36D6C.9D0657C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 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_0001_01C36D6C.9D0657C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Sorry, it will be months yet until my engine runs again. It ran on the dyno, now waiting to run on the airplane. Roger, thanks anyway. RC Engineering measured 570 cc/min on my Mazda injectors that I used as primaries. I have no measurements on the MSD 2013s. You can see on the attached photo the 570s are in the rotor housings and the 2013s are out = in the TB.=20 Your secondaries are still pretty close compared to others. =20 I'm not surprised at your mixture knob settings. Mine were even more extreme. I don't recall ever running on the MSDs only below the staging point. For the 570s I had to turn the mixture knob as far as it would = go to get enough correction at idle, and then it may still have been a bit = rich. But I was running with a constant pressure fuel regulator at 40 psi. The default settings are for 460 injectors, so your 570's should run = that rich. You may have to reduce your mode 3 injector flow rate eventually. = =20 I've changed to a MAP referenced regulator, and I'm planning on = switching the wiring to run the MSDs as the primaries (if my wiring harness = allows; I have completely separate wiring to the two sets coming from different sides). Tracy said it would work better to have the smaller injectors as = primaries, and he was right. It will irritate me (almost more than the ugly cowl) until I can figure out how to get the injectors matched, and switched = back to normal. =20 BTW; a plug for TWM Induction. I returned my constant pressure = regulator and they very promptly swapped my old fittings into a new MAP referenced body and returned it to me - NO charge. A bright spot in my day. Great. They were very helpful when I called with some questions about = the throttle body, and they didn't even care that it was for an airplane. I = may call them again and see if they can suggest a way to use other = injectors. =20 =20 Cheers, Rusty ------=_NextPart_000_0001_01C36D6C.9D0657C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Sorry, it will be months yet until my engine runs = again. =20 It ran on the dyno, now waiting to run on the airplane.

Roger, = thanks=20 anyway.

RC Engineering measured 570 cc/min on my Mazda injectors that I used = as=20 primaries.  I have no measurements on the MSD 2013s.  You can = see on=20 the attached photo the 570s are in the rotor housings and the 2013s are = out in=20 the TB. 

Your secondaries are = still pretty close=20 compared to others.   

I’m not = surprised at your=20 mixture knob settings.  Mine were even more extreme.  I = don’t recall=20 ever running on the MSDs only below the staging point.  For the = 570s I had=20 to turn the mixture knob as far as it would go to get enough correction = at idle,=20 and then it may still have been a bit rich.  But I was running with = a=20 constant pressure fuel regulator at 40 psi.

The default settings are = for 460=20 injectors, so your 570's should run that rich.  You may have to = reduce your=20 mode 3 injector flow rate eventually.    =

I’ve=20 changed to a MAP referenced regulator, and I’m planning on = switching the wiring=20 to run the MSDs as the primaries (if my wiring harness allows; I have = completely=20 separate wiring to the two sets coming from different sides).

Tracy said it = would work better=20 to have the smaller injectors as primaries, and he was right.  It = will=20 irritate me (almost more than the ugly cowl) until I can figure out how = to get=20 the injectors matched, and switched back to normal. 

BTW; a = plug for TWM=20 Induction.  I returned my constant pressure regulator and they very = promptly swapped my old fittings into a new MAP referenced body and = returned it=20 to me – NO charge.  A bright spot in my=20 day.
Great.  They = were very=20 helpful when I called with some questions about the throttle body, and = they=20 didn't even care that it was for an airplane.  I may call them = again and=20 see if they can suggest a way to use other injectors.  =
 
Cheers,
Rusty
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