X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from elasmtp-mealy.atl.sa.earthlink.net ([209.86.89.69] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1921698 for flyrotary@lancaironline.net; Wed, 14 Mar 2007 21:17:50 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.69; envelope-from=CBarber@TexasAttorney.net Received: from [24.238.254.112] (helo=BLF) by elasmtp-mealy.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1HReaW-0004J4-Uo for flyrotary@lancaironline.net; Wed, 14 Mar 2007 21:17:05 -0400 From: "Christopher Barber" To: "Rotary motors in aircraft" Subject: Speaking of Mistral....? Date: Wed, 14 Mar 2007 19:15:06 -0600 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0295_01C7666D.13444C60" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 In-Reply-To: X-ELNK-Trace: 04a7e290e6af3b12d3631fa4f7b525ef239a348a220c2609c06fca9b797041d84496940f4344e26885e0aeacdf564a64350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 24.238.254.112 This is a multi-part message in MIME format. ------=_NextPart_000_0295_01C7666D.13444C60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I have the Mistral intake and am setting up my fuel lines. The lines go into the fuel rail through a big hole (3/8?), but exit through a very tine "pin hole" on the other end. I am not versed in fuel injection as my history is with carbs in my ol' 65 Mustang ragtop. During the first incarnation my build buddy David had a pressure regulator installed before the fuel rail. Then, following some internet research on fuel injection by me, I found several sources that stated the pressure regulator is usually installed downstream of the rail. David figured this may make sense, but felt it should be T'ed back to the sump tank (sump per Velocity plans). I looked at my friends RV-7 who is installing an Eggennfelder Subaru which also has pin hole restrictor and tried to copy its pressure regulator set up, however, Dave and my mechanical engineering hangar mate, Richard, do not think it is proper. I too wondered what the pressure regulator was actually doing since it is downstream of the pin hole which provides a lot of restriction and it was T'ed in a manner that went around the regulator and since the fuel would go by the path of least resistance would in all likelihood bypass the fuel pressure regulator almost completely. I had another engineering friend look at the set up (who btw has worked with some of the Mistral folks as he is heavily involved in the aviation community...the company he owns provides aircraft A/C systems for companies like Cirrus, Moony, Eclipse, Columbia and in the last couple of months he has been in discussions with Cessna, Piper and Honda Jet.....pretty good credentials....and he is the builder of the RV-7 with the Eggenfeilder) He believes that the Mistral Intake does not need the pressure regulator since the pin hole is doing the job of keeping the rail "charged". We have emailed the contacts at Mistral who have not as of yet responded....it has been a couple of weeks. I understand they cannot provide major tech support, but I would love some direction. We hope to be great ambassadors for their product. I would assume some basic tech info is available. However, since I have yet to hear from Mistral, do any of y'all have any insight and/or solutions as to what would be "best" . Thanks, I am quite close to first start, but I obviously need to resolve this question. All the best, Chris Barber Houston, Texas www.LoneStarVelocity.com ------=_NextPart_000_0295_01C7666D.13444C60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I have=20 the Mistral intake and am setting up my fuel lines.  The lines go = into the=20 fuel rail through a big hole (3/8?), but exit through a very tine "pin = hole" on=20 the other end.  I am not versed in fuel injection as my history is = with=20 carbs in my ol' 65 Mustang ragtop.
 
During=20 the first incarnation my build buddy David had a pressure regulator = installed=20 before the fuel rail.  Then, following some internet research on = fuel=20 injection by me, I found several sources that stated the pressure = regulator is=20 usually installed downstream of the rail.  David figured this may = make=20 sense, but felt it should be T'ed back to the sump tank (sump per = Velocity=20 plans). 
 
I=20 looked at my friends RV-7 who is installing an Eggennfelder Subaru which = also=20 has  pin hole restrictor and tried to copy its pressure = regulator set=20 up, however, Dave and my mechanical engineering hangar mate, Richard, do = not=20 think it is proper.  I too wondered what the pressure regulator was = actually doing since it is downstream of the pin hole which provides a = lot of=20 restriction and it was T'ed in a manner that went around the regulator = and since=20 the fuel would go by the path of least resistance would in all = likelihood bypass=20 the fuel pressure regulator almost completely.
 
I had=20 another engineering friend look at the set up (who btw has worked with = some of=20 the Mistral folks as he is heavily involved in the aviation = community...the=20 company he owns provides aircraft A/C systems for companies like Cirrus, = Moony,=20 Eclipse, Columbia and in the last couple of months he has been in = discussions=20 with Cessna, Piper and Honda Jet.....pretty good credentials....and he = is the=20 builder of the RV-7 with the Eggenfeilder)  He believes that the = Mistral=20 Intake does not need the pressure regulator since the pin hole is doing = the job=20 of keeping the rail "charged".
 
We=20 have emailed the contacts at Mistral who have not as of yet = responded....it has=20 been a couple of weeks.  I understand they cannot provide major = tech=20 support, but I would love some direction.  We hope to be great = ambassadors=20 for their product.  I would assume some basic tech info is=20 available.
 
However, since I have yet to hear from Mistral, do any of y'all = have any=20 insight and/or solutions as to what would be "best" <g>. =20
 
Thanks, I am quite close to first start, but I obviously need = to resolve=20 this question.
 
All=20 the best,
 
Chris=20 Barber
Houston, Texas
 
www.LoneStarVelocity.com
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