X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from bay0-omc1-s6.bay0.hotmail.com ([65.54.246.78] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1973573 for flyrotary@lancaironline.net; Sat, 07 Apr 2007 22:22:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.78; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.74]) by bay0-omc1-s6.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2668); Sat, 7 Apr 2007 19:21:58 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sat, 7 Apr 2007 19:21:58 -0700 Message-ID: Received: from 4.171.129.98 by BAY115-DAV2.phx.gbl with DAV; Sun, 08 Apr 2007 02:21:57 +0000 X-Originating-IP: [4.171.129.98] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Renesis full power fuel burn / EC2 injector driver change Date: Sat, 7 Apr 2007 22:21:49 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0040_01C77963.22DDC170" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.50.0034.2000 Seal-Send-Time: Sat, 7 Apr 2007 22:21:49 -0400 X-OriginalArrivalTime: 08 Apr 2007 02:21:58.0181 (UTC) FILETIME=[AEFD0550:01C77984] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0040_01C77963.22DDC170 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi David, Yes, if you have fiddled with the MAP table for some time and = still are unable to get a smooth idle, the injector driver change is = worth trying. The large turbo injectors (550 cc) are more sensitive to = this problem so while there is no guarantee that there are no other = problems, there is a higher likelyhood that this could be the answer. Builders using using the EM2 should send it in as well because the fuel = flow will read too high after the EC2 change if the EM2 is not also = updated. Tracy ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 Sent: Saturday, April 07, 2007 9:08 PM Subject: [FlyRotary] Re: Renesis full power fuel burn / EC2 injector = driver change Tracy,=20 Cool, this is the first I have heard of the injector drive update and = I am hopeful that it might be the key to my idle problems. I have done = a lot of fiddling and still cant beat it. I am particularly interested = to hear what kind of idle issues it fixes, to see if it sounds like = mine.=20 My problem consists of constantly wandering mixture need... (the O2 = bar is constantly wandering full scale without change in throttle, load, = or mixture setting). I have frequent misses, and I have to run my fuel = pressure as low as my regulator can be set (about 32 psi at idle) or the = problem gets worse. =20 The weirdest thing occurs at shutdown. I shutdown by turning off the = fuel pump. When I do that, the engine runs silky-smoothly for a second = or two before stopping. =20 That made me concerned there might be some sort of electrical = interference between the fuel pump and the EC2 since they were on the = same buss. I moved the pump to a separate buss, tried a different pump, = tried another buss, and installed a capacitor but none of that seemed to = have any effect.=20 Do you think it would be worth sending my EC2 in for the new upgrade? --=20 David Leonard Turbo Rotary RV-6 N4VY N4VY.RotaryRoster.net www.RotaryRoster.net leonardiniraq.blogspot.com=20 =20 On 4/6/07, Tracy Crook > wrote:=20 =20 EC2 injector drive snubber update. On the subject of the injector driver snubber change, I had hoped = to make it an easy to do in the field thing but it did not turn out that = way. The physical change is fairly simple (adds a single part to the = board) but the change in injector drive pulse width requirement was so = radical that it is beyond the current range of the injector flow rate = adjustment (Mode 3). This requires an update to the EC2 software so it = has to be done here : (=20 The same thing applies to the EM2 since it determines the fuel flow = by looking at the injector pulse on time. It could not be recalibrated = to compensate for the change so it's software had to be updated as well. = OTOH, if you are currently flying the EC2 and/or EM2 and you are = happy with the way it is running, there is no pressing need to change = anything. This is not a safety of flight issue.=20 This change is only necessary if you are finding it impossible to = get the engine to run smoothly at idle. Note that this is not the only = thing that can cause rough idle so only do this as a last resort to fix = idle problems.=20 Since I only today got the EM2 software changes installed, I still = do not know if there is any fuel burn improvements as a result of the = snubber change. All EC2s shipped since March 20 have this change = incorporated.=20 Tracy=20 ------=_NextPart_000_0040_01C77963.22DDC170 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi David,  Yes, if you have fiddled with the MAP table for = some time=20 and still are unable to get a smooth idle, the injector driver change is = worth=20 trying.  The large turbo injectors (550 cc) are more sensitive to = this=20 problem so while there is no guarantee that there are no other = problems,=20 there is a higher likelyhood that this could be the answer.
 
Builders using using the EM2 should send it in as well because the = fuel=20 flow will read too high after the EC2 change if the EM2 is not also = updated.
 
Tracy
 
 
----- Original Message -----
To: Rotary motors in = aircraft
Sent: Saturday, April 07, 2007 = 9:08=20 PM
Subject: [FlyRotary] Re: = Renesis full=20 power fuel burn / EC2 injector driver change

Tracy,
 
Cool, this is the first I have heard of the injector drive update = and I=20 am hopeful that it might be the key to my idle problems.  I have = done a=20 lot of fiddling and still cant beat it.  I am particularly = interested to=20 hear what kind of idle issues it fixes, to see if it sounds like mine. =
 
My problem consists of constantly wandering mixture need... (the = O2 bar=20 is constantly wandering full scale without change in throttle, load, = or=20 mixture setting).   I have frequent misses, and I have to = run my=20 fuel pressure as low as my regulator can be set (about 32 psi at = idle) or=20 the problem gets worse. 
 
The weirdest thing occurs at shutdown.  I shutdown by = turning off=20 the fuel pump.  When I do that, the engine runs silky-smoothly = for a=20 second or two before stopping. 
 
That made me concerned there might be some sort of electrical=20 interference between the fuel pump and the EC2 since they were on the = same=20 buss.  I moved the pump to a separate buss, tried a different = pump, tried=20 another buss, and installed a capacitor but none of that seemed to = have any=20 effect.
 
Do you think it would be worth sending my EC2 in for the new=20 upgrade?
 
--

David Leonard

Turbo Rotary RV-6 N4VY
N4VY.RotaryRoster.net
www.RotaryRoster.net
leonardiniraq.blogspot.com= =20

 
On 4/6/07, Tracy=20 Crook <lors01@msn.com> wrote:=20
 =20
EC2 injector drive snubber update.
 
On the subject of the injector driver snubber change,  I = had hoped=20 to make it an easy to do in the field thing but it did not turn out = that=20 way.  The physical change is fairly simple (adds a single part = to the=20 board) but the change in injector drive pulse width requirement was = so=20 radical that it is beyond the current range of the injector flow = rate=20 adjustment (Mode 3).   This requires an update to the EC2 = software=20 so it has to be done here : (
 
The same thing applies to the EM2 since it determines the fuel = flow by=20 looking at the injector pulse on time.   It could not = be=20 recalibrated to compensate for the change so it's software had to be = updated=20 as well.
 
OTOH, if you are currently flying the EC2 and/or EM2 and you = are happy=20 with the way it is running, there is no pressing need to change=20 anything.  This is not a safety of flight issue. 
 
 This change is only necessary if you are finding it = impossible to=20 get the engine to run smoothly at idle.  Note that this is not = the only=20 thing that can cause rough idle so only do this as a last resort to = fix idle=20 problems.
 
Since I only today got the EM2 software changes installed, I = still do=20 not know if there is any fuel burn improvements as a result of the = snubber=20 change.  All EC2s shipped since March 20 have this change = incorporated.=20
 
Tracy 


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