X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-gx0-f180.google.com ([209.85.161.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5038670 for flyrotary@lancaironline.net; Thu, 30 Jun 2011 15:51:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.180; envelope-from=rwstracy@gmail.com Received: by gxk10 with SMTP id 10so2197928gxk.25 for ; Thu, 30 Jun 2011 12:51:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; bh=gbnsI8NOPAoo4eI+gGjZtzEyLGV2qMD79Il7U7k+Kr8=; b=qu7aGb0vICmZY3VQEfVsHyXTa+55eRghDdcDJ2X/qJFamYkCSIMY0tNMte8sRqQBhw Tqt4D2DTyw3oByx+yVf7YPSQCbH/YLjAqUlJI4zVIF+zlCaHfPrI+Z6HwDkEe1wPK7yE LsK7AP4Dfv49RXtmf1Wm+9gSwpxVEQK5ML2L8= Received: by 10.150.163.5 with SMTP id l5mr2190611ybe.336.1309463480078; Thu, 30 Jun 2011 12:51:20 -0700 (PDT) Return-Path: Received: from [75.220.101.208] (208.sub-75-220-101.myvzw.com [75.220.101.208]) by mx.google.com with ESMTPS id 18sm833007yba.10.2011.06.30.12.51.15 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 30 Jun 2011 12:51:18 -0700 (PDT) Subject: Re: [FlyRotary] EC-2 Jumping MAP table adresses References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-17-443792521 X-Mailer: iPad Mail (8F191) In-Reply-To: Message-Id: Date: Thu, 30 Jun 2011 14:51:08 -0500 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPad Mail 8F191) --Apple-Mail-17-443792521 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Sounds like the jumps are normal but all depends on where you have set mode 7= which is the MP threshold for the rpm table. I know this is a bit complica= ted but that's the nature of the beast. =20 I'd say you are using about twice as much oil in the fuel as you should. I d= on't know if that Delvac oil is suitable or not ( for the crankcase oil) I u= sually recommend Mobile 1 synthetic 15W - 50. Tracy Sent from my iPad On Jun 29, 2011, at 9:45 PM, shipchief@aol.com wrote: > Just a few technical questions to Tracy and the group: > I have an EC2-A1T #274 upgrade 02-15-09 > with EM2-B2 #166 > While running today, I noticed that the address table would switch back an= d forth between #31 and 41, 42,& 43. > I checked the Mixture Correction Table Address Assignments (Pg 33 in the m= anual), and figured that was the jump off point to the 2500- to > 3800 RPM part of the table. > So I ran the engine some more, and noticed that even lower RPMs with addre= sses in the 20's would jump up to 41, 42, 43, some times 44. > Then drop back to the original value (+-). Am I getting speed reference no= ise? The engine runs well, and smoothly, except when it jumps to > the 40's. During previous runs, Auto tune richened these up, and I smoothe= d it with the MAP table screen while shut down. That's another issue which I= can handle. > Anyway, my injector wires are a few inches separate from the ignition wire= s to the coils. I have an RV-8, and the EC2 unit is mounted in the > right fwd baggage well. The wires pass forward thru the firewall separate= ly. > Also, I think I noticed some time delay or dead band when rising or droppi= ng thru the 2500 RPM threshold. The Address number doesn't > change instantly with the RPM. Is that 'as intended'? > I ran briefly above 3800 RPM with no problems or changes required to the m= ixture control. So I don't have any obvious problems up there yet. The stagi= ng point occurs @ address 53, and is noticed as a small increase in power, b= ut no change in mixture reading. > Exhaust temps are close, about 5 degrees difference @ 1500 F. > I started this run with a 'Test Card' to run in MAP table screen in Track M= ode, and then move to Mode 8 Ignition timing. > This was good. I re-read the manual a lot before this run, it paid off. I r= an the engine about 3000 RPM, and moved the timing to both limits a few time= s while observing the RPM and adjusting the mixture. I settled on the highes= t RPM, which is only 1 degree retarded from the baseline, using Tracy's init= ial installation instructions for installing the Crank Angle Sensor. > I have a Turbo engine, with opened rotor cooling jets and a restrictor in t= he oil fitting on the turbo. I get low oil pressure at 1500 RPM about 24 PSI= using 5W-30 oil, about 68 PSI @ 3500RPM. > HOBBS=3D 3.8 Hrs. time to dump the break in oil and filter. I have a drum o= f Mobile DELVAC 1240 40W oil for Detroit Diesel 2 strokes, I think it would b= e safe in a rotary (both are ported engines) > I mix 2 cycle oil in the gas, about 75:1 for now. > My EAA chapter has member photo pages, and the web master recently cleaned= up the spam, so I'm posting progress pic again. > http://gallery.eaa326.org/main.php?g2_itemId=3D1727 > Scott --Apple-Mail-17-443792521 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=utf-8
Sounds like the jumps are normal but all depends on where you have set mode 7 which is the MP threshold for the rpm table.  I know this is a bit complicated but that's the nature of the beast.   

I'd say you are using about twice as much oil in the fuel as you should.  I don't know if that Delvac oil is suitable or not ( for the crankcase oil)  I usually recommend Mobile 1 synthetic 15W - 50.

Tracy

Sent from my iPad

On Jun 29, 2011, at 9:45 PM, shipchief@aol.com wrote:

Just a few technical questions to Tracy and  the group:
I have an EC2-A1T #274 upgrade 02-15-09
with EM2-B2 #166
While running today, I noticed that the address table would switch back and forth between #31 and 41, 42,& 43.
I checked the Mixture Correction Table Address Assignments (Pg 33 in the manual), and figured that was the jump off point to the 2500- to
3800 RPM part of the table.
So I ran the engine some more, and noticed that even lower RPMs with addresses in the 20's would jump up to 41, 42, 43, some times 44.
Then drop back to the original value (+-). Am I getting speed reference noise? The engine runs well, and smoothly, except when it jumps to
the 40's. During previous runs, Auto tune richened these up, and I smoothed it with the MAP table screen while shut down. That's another issue which I can handle.
Anyway, my injector wires are a few inches separate from the ignition wires to the coils. I have an RV-8, and the EC2 unit is mounted in the
right fwd baggage well. The  wires pass forward thru the firewall separately.
Also, I think I noticed some time delay or dead band when rising or dropping thru the 2500 RPM threshold. The Address number doesn't
change instantly with the RPM. Is that 'as intended'?
I ran briefly above 3800 RPM with no problems or changes required to the mixture control. So I don't have any obvious problems up there yet. The staging point occurs @ address 53, and is noticed as a small increase in power, but no change in mixture reading.
Exhaust temps are close, about 5 degrees difference @ 1500 F.
I started this run with a 'Test Card' to run in MAP table screen in Track Mode, and then move to Mode 8 Ignition timing.
This was good. I re-read the manual a lot before this run, it paid off. I ran the engine about 3000 RPM, and moved the timing to both limits a few times while observing the RPM and adjusting the mixture. I settled on the highest RPM, which is only 1 degree retarded from the baseline, using Tracy's initial installation instructions for installing the Crank Angle Sensor.
I have a Turbo engine, with opened rotor cooling jets and a restrictor in the oil fitting on the turbo. I get low oil pressure at 1500 RPM about 24 PSI using 5W-30 oil, about 68 PSI @ 3500RPM.
HOBBS= 3.8 Hrs. time to dump the break in oil and filter. I have a drum of Mobile DELVAC 1240 40W oil for Detroit Diesel 2 strokes, I think it would be safe in a rotary (both are ported engines)
I mix 2 cycle oil in the gas, about 75:1 for now.
My EAA chapter has member photo pages, and the web master recently cleaned up the spam, so I'm posting progress pic again.
Scott
--Apple-Mail-17-443792521--