X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.4.51.86] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 5.0c4) with ESMTP id 765650 for flyrotary@lancaironline.net; Sat, 15 Oct 2005 11:54:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.4.51.86; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sat, 15 Oct 2005 08:53:30 -0700 Message-ID: Received: from 4.174.7.109 by BAY107-DAV14.phx.gbl with DAV; Sat, 15 Oct 2005 15:53:30 +0000 X-Originating-IP: [4.174.7.109] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: injector size Date: Sat, 15 Oct 2005 11:53:25 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01A6_01C5D17F.0CD3B520" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Sat, 15 Oct 2005 11:53:25 -0400 X-OriginalArrivalTime: 15 Oct 2005 15:53:30.0452 (UTC) FILETIME=[96C6F140:01C5D1A0] This is a multi-part message in MIME format. ------=_NextPart_000_01A6_01C5D17F.0CD3B520 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Probably caused by the EC2 back-powering the +12 bus through the = injectors. BTW, the EM2 should be on a separate avionics bus, not the = flight critical. Tracy ----- Original Message -----=20 From: Bulent Aliev=20 To: Rotary motors in aircraft=20 Sent: Friday, October 14, 2005 12:07 PM Subject: [FlyRotary] Re: injector size Hi Ed, I discovered last night that there is a mystery related to my primary = injector switch: with only the master on, I turn the primary injector = switch on, and the EM display comes on with 6.5V "low voltage" =20 reading. I have to find out how the injector cirquit can feed power =20 to the EM? Any ideas? Buly On Oct 11, 2005, at 4:47 PM, Ed Anderson wrote: > Buly, Something you might try is setting the staging manifold =20 > pressure point at a higher manifold pressure. That way your 550c =20 > primary should be the only ones on at low and even medium rpms and =20 > since the Ec2 appears to work fine with 550s out of the box, this =20 > might help. Since you have already gone the mode 3 route, this is =20 > the only thing I can think of. > > I believe the problem is that upon initial start, the EC2 sees =20 > ambient pressure in the manifold (30"Hg) and thinks the engine is =20 > wide open throttle, it checks the fuel map for the amount of fuel =20 > to inject for MAP =3D 30"Hg and injects fuel (a lot!) accordingly. = =20 > Normally, this is not a problem as the engine immediately starts =20 > and sucks the manifold pressure down to the nominal 12-14" Hg (for = > idle) and the fuel injected is adjust accordingly AND the secondary = > are turned off (until the manifold pressure again rises to the =20 > staging point), but with your big injectors having all four dump =20 > fuel before the engine is started and running is probably =20 > contributing to the problem. > > Do you have switches on your injectors and have you tried starting =20 > with the secondary injectors turned off?? > > I presume you don't have the cold start turned on (accidentally or =20 > otherwise -shorted). > > I presume you have programmed a lean mixture for start up region . > > Ed A > > > > ----- Original Message ----- From: "Bulent Aliev" =20 > > > To: "Rotary motors in aircraft" = > > Sent: Tuesday, October 11, 2005 4:15 PM > Subject: [FlyRotary] injector size > > > >> Hi Guys, >> For the last few months I have been struggling with engine =20 >> flooding on start up. Looking at the EC2 manual, it tells me =20 >> that it comes pre-set for "standard" Mazda injectors. I checked =20 >> the injector charts and most of the Mazdas have 460 or 550 CC =20 >> injectors for primary and secondary. My engine (Cosmo 13B) comes =20 >> with 550 cc primary and 850 cc secondary. >> >> I did some Mode3 adjustment on the EC-2 and looks like it's a bit = >> better, but the trailing plugs get wet if it does not start right =20 >> away? >> Any Ideas? >> Buly >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ >> > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ > Bulent Aliev www.enginegearonline.com Email: bulent@enginegearonline.com Ph. 954 557-1019 ------=_NextPart_000_01A6_01C5D17F.0CD3B520 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Probably caused by the EC2 back-powering the +12 bus through the=20 injectors.    BTW, the EM2 should be on a separate = avionics bus,=20 not the flight critical.
 
Tracy
 
 
 
 
----- Original Message -----
From: Bulent Aliev
To: Rotary motors in = aircraft
Sent: Friday, October 14, 2005 = 12:07=20 PM
Subject: [FlyRotary] Re: = injector=20 size

Hi Ed,
I discovered last night that there is a = mystery=20 related to my primary 
injector switch: with only the master = on, I=20 turn the primary injector 
switch on, and the EM display = comes on=20 with 6.5V "low voltage" 
reading. I have to find out how the = injector=20 cirquit can feed power 
to the EM?
Any = ideas?
Buly
On Oct=20 11, 2005, at 4:47 PM, Ed Anderson wrote:

> Buly,  = Something you=20 might try is setting the staging manifold 
> pressure = point at a=20 higher manifold pressure.  That way your 550c 
> = primary=20 should be the only ones on at low and even medium rpms and  =
>=20 since the Ec2 appears to work fine with 550s out of the box, = this =20
> might help. Since you have already gone the mode 3 route, = this=20 is 
> the only thing I can think of.
>
> I = believe the=20 problem is that upon initial start,  the EC2 sees 
> = ambient=20 pressure in the manifold (30"Hg) and thinks the engine is  =
> wide=20 open throttle, it checks the fuel map for the amount of fuel  =
> to=20 inject for MAP =3D 30"Hg and  injects fuel (a lot!)=20 accordingly.  
> Normally, this is not a problem as = the=20 engine immediately starts 
> and  sucks the manifold = pressure=20 down to the nominal 12-14" Hg (for 
> idle) and the fuel = injected=20 is adjust accordingly AND the secondary 
> are turned off = (until=20 the manifold pressure again rises to the 
> staging = point), but=20 with your big injectors having all four dump 
> fuel = before the=20 engine is started and running is probably 
> contributing = to the=20 problem.
>
> Do you have switches on your injectors and = have you=20 tried starting 
> with the secondary injectors turned=20 off??
>
> I presume you don't have the cold start turned = on=20 (accidentally or 
> otherwise -shorted).
>
> I = presume=20 you have programmed a lean mixture for start up region =
>
> Ed=20 A
>
>
>
> ----- Original Message ----- From: = "Bulent=20 Aliev" 
> <atlasyts@bellsouth.net>
= >=20 To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>=20 Sent: Tuesday, October 11, 2005 4:15 PM
> Subject: [FlyRotary] = injector=20 size
>
>
>
>> Hi Guys,
>> For the = last few=20 months I have been struggling with engine 
>> = flooding  on=20 start up.  Looking at the EC2 manual, it tells me  =
>> that=20 it comes  pre-set for "standard" Mazda injectors. I checked  =
>> the injector charts  and most of the Mazdas have 460 = or 550=20 CC 
>> injectors for primary and  secondary. My = engine=20 (Cosmo 13B) comes 
>> with 550 cc primary and 850 = cc =20 secondary.
>>
>> I did some Mode3 adjustment on the = EC-2 and=20 looks like it's a bit  
>> better, but the = trailing plugs=20 get wet if it does not start right 
>> = away?
>> Any=20 Ideas?
>> Buly
>>
>> --
>> = Homepage: =20 http://www.flyrotary.com/
>&= gt;=20 Archive and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
>>
>
>
>
= >=20 --
> Homepage:  http://www.flyrotary.com/
> = Archive=20 and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
>

Bulent=20 Aliev
www.enginegearonline.com
= Email:=20 bulent@enginegearonline.com
Ph.=20 954 557-1019

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