X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from an-out-0708.google.com ([209.85.132.248] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1974066 for flyrotary@lancaironline.net; Sun, 08 Apr 2007 07:59:41 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.132.248; envelope-from=msteitle@gmail.com Received: by an-out-0708.google.com with SMTP id c34so1334377anc for ; Sun, 08 Apr 2007 04:58:54 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=X6qPBOgyRmiM5/ZAHlqo13oo9h3IgVH2rgkcxPjK+b6b3eYPXe+y5vSmubQEk5swZMfiSeghFzr/ipLGWY2ETawtoqOk9p60ydfW7ZNnnabl48E4q/3yEHUF4m2QLEr2BJ+1BxfSEUWik65zrfjuQfQPgbzxBGeHnQmWjlzWydc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=jrQZzUbwZHUDPtb87WpIzrI19LLi3bEVUvnNsvEWfZG42ggaerTcT+dS+z4jQFzvDHWWclCnZfAvRBnYh4cQhd6YdXYkMFa1v35MXIX0kuU46nTA2D5sU+2oOmv7gPzHyfuEKuKAvtwWwOjs4g3qUuKOtbA1NiYjaI9ogjvwjus= Received: by 10.100.138.2 with SMTP id l2mr3314634and.1176033533184; Sun, 08 Apr 2007 04:58:53 -0700 (PDT) Received: by 10.100.173.2 with HTTP; Sun, 8 Apr 2007 04:58:53 -0700 (PDT) Message-ID: <5cf132c0704080458t11aac5efm58f3fae3a1d22ffd@mail.gmail.com> Date: Sun, 8 Apr 2007 06:58:53 -0500 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Renesis full power fuel burn / EC2 injector driver change In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_27530_20487359.1176033533139" References: ------=_Part_27530_20487359.1176033533139 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Buly, Out of curiousity, what FP do you see at idle? Mark S. On 4/8/07, Bulent Aliev wrote: > > Mark, I set my FP with engine off at around 36 psi. > Buly > On Apr 8, 2007, at 1:17 AM, Mark Steitle wrote: > > > David, > > If you don't mind me asking, how did you go about adjusting your > > fuel pressure regulator? I ask because I had mine set too high, > > but thought it was correct. I never could get it to run well in > > the lower rpm range. When I reduced the pressure I was finally > > able to get the engine to run better than ever. It ran great at > > high speed and would even idle smoothly down to 900 -1000 rpm. > > With the manifold referenced pressure regulator, the fuel pressure > > will change depending on MAP. If I'm correct, you should set it > > with the engine not running. If you set it with the engine > > running, your actual pressures will be way too high, causing tuning > > issues. > > > > Mark S. > > > > > > On 4/7/07, David Leonard wrote: > > Tracy, > > > > 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. > > > > 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. > > > > 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. > > > > 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. > > > > Do you think it would be worth sending my EC2 in for the new upgrade? > > > > -- > > > > David Leonard > > > > Turbo Rotary RV-6 N4VY > > N4VY.RotaryRoster.net > > www.RotaryRoster.net > > leonardiniraq.blogspot.com > > > > > > On 4/6/07, Tracy Crook wrote: > > > > 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 : ( > > > > 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. > > > > 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. > > > > 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. > > > > Tracy > > > > > > > > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > ------=_Part_27530_20487359.1176033533139 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline
Buly,
Out of curiousity, what FP do you see at idle?
 
Mark S.

 
On 4/8/07, Bulent Aliev <atlasyts@bellsouth.net> wrote:
Mark, I set my FP with engine off at around 36 psi.
Buly
On Apr 8, 2007, at 1:17 AM, Mark Steitle wrote:

> David,
> If you don't mind me asking, how did you go about adjusting your
> fuel pressure regulator?  I ask because I had mine set too high,
> but thought it was correct.  I never could get it to run well in
> the lower rpm range.  When I reduced the pressure I was finally
> able to get the engine to run better than ever.  It ran great at
> high speed and would even idle smoothly down to 900 -1000 rpm.
> With the manifold referenced pressure regulator, the fuel pressure
> will change depending on MAP.  If I'm correct, you should set it
> with the engine not running.  If you set it with the engine
> running, your actual pressures will be way too high, causing tuning
> issues.
>
> Mark S.
>
>
> On 4/7/07, David Leonard <wdleonard@gmail.com> wrote:
> Tracy,
>
> 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.
>
> 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.
>
> 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.
>
> 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.
>
> Do you think it would be worth sending my EC2 in for the new upgrade?
>
> --
>
> David Leonard
>
> Turbo Rotary RV-6 N4VY
> N4VY.RotaryRoster.net
> www.RotaryRoster.net
> leonardiniraq.blogspot.com
>
>
> On 4/6/07, Tracy Crook <lors01@msn.com> wrote:
>
> 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 : (
>
> 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.
>
>  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.
>
> 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.
>
> Tracy
>
>
>
>


--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html

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