X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 619948 for flyrotary@lancaironline.net; Sat, 30 Jul 2005 14:04:06 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-065-188-083-049.carolina.res.rr.com [65.188.83.49]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j6UI3Il9009465 for ; Sat, 30 Jul 2005 14:03:19 -0400 (EDT) Message-ID: <000701c59530$fea03c10$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Too rich, no start Date: Sat, 30 Jul 2005 14:03:30 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C5950F.77470BC0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C5950F.77470BC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bernie, My fuel system will sometimes hold the fuel pressure for several days. = But, it will always hold the pressure for 30 minutes or more after = turning off the fuel pumps and injectors. So it sure seems something is = continuing to let the fuel into the chamber after you have turned things = off. =20 Try this. Place your injectors OFF, turn power to your EC2 OFF. Turn = on your fuel pumps and monitor your fuel pressure. Once it stabilizes = at around 40 psi. Turn off your pumps. Note how long (quick) it takes = the fuel pressure to decay. If it does it in less than 5 minutes you = have a leak. =20 Another possibility is that your MAP in your EC2 may be wrong now that = your starting compression is so much better. I suspect that with the = higher manifold pressure with your previous lower compression the EC2 = had to be adjusted pretty rich to run at all. Now that your manifold = pressure signal is much better (pressure lower) during cranking it may = be that the EC2 is still set and injecting too much fuel (although I = would have though the EC2 would automatically have compensate enough to = at least get started). =20 Ed ----- Original Message -----=20 From: WALTER B KERR=20 To: Rotary motors in aircraft=20 Sent: Saturday, July 30, 2005 12:39 PM Subject: [FlyRotary] Too rich, no start Finally got around to getting the 13B installed back in the 9A. Lots = of excuses why have not got it back in earlier since since Bruce = Turrentine went through it to see why the cranking compression was so = low. He found blow by on the side seals , but could not explain why. It = now feels much more like others when you swing the prop through. It did not start right up like I hoped now that it has better low rpm = compression. Pulled plugs from both rotors and both were wet. I noticed = that when leak checking the fuel system before cranking that the fuel = pressure immediately went back to zero. Suspicioned that an injector was leaking but ruled that out since = both rotor's plugs were wet after trying to crank. ????I would think that would indicate a Leaking injector!! Checked the rate of fuel pressure decay after shutting the fuel pump = off both with the injectors on and disabled. No real noticeable change. Any suggestions?? My memory is correct that the fuel pressure stayed up a relatively = long time on shutting the pump off before I had the engine out isn't = it?? Bernie, maybe I'm too old fashioned to get all this electrical stuff = to work :>( ------=_NextPart_000_0004_01C5950F.77470BC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bernie,
 
My fuel system will sometimes hold the fuel = pressure for=20 several days.  But, it will always hold the pressure for 30 minutes = or more=20 after turning off the fuel pumps and injectors.  So it sure seems = something=20 is continuing to let the fuel into the chamber after you have turned = things=20 off. 
 
Try this.  Place your injectors OFF, turn = power to=20 your EC2 OFF.  Turn on your fuel pumps and monitor your fuel=20 pressure.  Once it stabilizes at around 40 psi.  Turn off your = pumps.  Note how long (quick) it takes the fuel pressure to = decay.  If=20 it does it in less than 5 minutes you have a leak. 
 
Another possibility is that your MAP in your EC2 = may be=20 wrong now that your starting compression is so much better.  I = suspect that=20 with the higher manifold pressure with your previous lower = compression=20 the EC2  had to be adjusted pretty rich to run at all.  Now = that your=20 manifold pressure signal is much better (pressure lower) during = cranking it=20 may be that the EC2 is still set and  injecting too much = fuel=20 (although I would have though the EC2 would automatically have = compensate=20 enough to at least get started).
 
 
   Ed
 
----- Original Message -----
From:=20 WALTER B = KERR
Sent: Saturday, July 30, 2005 = 12:39=20 PM
Subject: [FlyRotary] Too rich, = no=20 start

 
Finally got around to getting the 13B = installed=20 back in the 9A. Lots of excuses why have not got it back in earlier = since=20 since Bruce Turrentine went through it to see why the cranking = compression was=20 so low. He found blow by on the side seals , but could not explain = why. It now=20 feels much more like others when you swing the prop = through.
 
It did not start right up like I = hoped now that=20 it has better low rpm compression. Pulled  plugs from both rotors = and=20 both were wet. I noticed that when leak checking the fuel system = before=20 cranking that the fuel pressure immediately went back to = zero.
 
 Suspicioned that an injector = was leaking=20 but ruled that out since both rotor's plugs were wet after trying to=20 crank.
 
????I would = think that=20 would indicate a Leaking injector!!
 
Checked the rate of fuel pressure = decay after=20 shutting the fuel pump off both with the injectors on and = disabled. No=20 real noticeable change.
 
Any suggestions??
 
My memory is correct that the fuel = pressure=20 stayed up a relatively long time on shutting the pump off before I had = the=20 engine out isn't it??
 
Bernie, maybe I'm too old fashioned = to get all=20 this electrical stuff to work=20 :>(
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