X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iw0-f180.google.com ([209.85.214.180] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTPS id 4983685 for flyrotary@lancaironline.net; Sat, 14 May 2011 15:03:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.180; envelope-from=rwstracy@gmail.com Received: by iwn6 with SMTP id 6so6241690iwn.25 for ; Sat, 14 May 2011 12:03:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:subject:references:from:content-type:x-mailer :in-reply-to:message-id:date:to:content-transfer-encoding :mime-version; bh=0YZo+lliYUxwfKe7mslVIDXEiiQhuR+Ec9Fxq3+AwoQ=; b=kHcf6MYxXu3UM0+2xScPgdQM/Is1oZTd5nsFCQ6YIOWwQoJN6Per6XSnt9b6Lkq78P ZDH5I0zr2BW/Iz52yzgMey/2Wu/V3tZAvNdEb+bsus3GixRZ65X7liKbZ4YpcvwJ8mQK uMXi0N7OhLmbh3tGNWpiR7cscjVpBHvE7dcSY= DomainKey-Signature: a=rsa-sha1; c=nofws; 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; b=magcUsMri7RRUyTSJPoNTNb/O25452qCL1wyRfrF3V9/cpy45rjE046NXTtbDlU+KR kDJYGaF8wqkkblBrfZRna8K6z/G36jnDiNr2NYwbtZjfxhl4RSpgJXOraAu9jG7kB6mc MB+iX3thE6vuzx6UwPA6TFLTYUEreyhgGw+Gg= Received: by 10.42.146.196 with SMTP id k4mr3443250icv.105.1305399782448; Sat, 14 May 2011 12:03:02 -0700 (PDT) Return-Path: Received: from [10.0.1.8] (99-197-145-127.cust.wildblue.net [99.197.145.127]) by mx.google.com with ESMTPS id hc41sm1462587ibb.30.2011.05.14.12.02.55 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 14 May 2011 12:03:01 -0700 (PDT) Subject: Re: [FlyRotary] Re: Engine Tuning References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-3-675061533 X-Mailer: iPad Mail (8F191) In-Reply-To: Message-Id: Date: Sat, 14 May 2011 15:02:45 -0400 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPad Mail 8F191) --Apple-Mail-3-675061533 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii As Steve pointed out, "hand grenades" are not an indication of bad mixture. = I suspect bad crank sensor detection. This can be caused by noise, warped t= rigger wheel, etc. If the EC2 is an early version, it might need the Renesi= s CAS mod since the 3rd gen sensor is similar. Btw, the 13BREW started in 9= 3 so I'm still not sure which engine you have. Tracy Sent from my iPad On May 13, 2011, at 8:34 PM, bktrub@aol.com wrote: > 92 13BREW, normally alspirated, it has 28 lb primaries and 40 lb secondari= es- That's what it came with. > =20 > Brian Trubee >=20 >=20 >=20 > -----Original Message----- > From: Tracy > To: Rotary motors in aircraft > Sent: Fri, May 13, 2011 3:48 pm > Subject: [FlyRotary] Re: Engine Tuning >=20 > Brian, > What engine are you using? 2nd gen, Renesis, etc. >=20 > Tracy >=20 > Sent from my iPad >=20 > On May 13, 2011, at 5:35 PM, bktrub@aol.com wrote: >=20 >>=20 >> Since the weather has been cooperating lately, I've had the opportunity t= o put a few more hours on the airplane. On the ground, I can go from an idle= up to full throttle and the engine will be smooth. But when I take off, it s= eems that as soon as I'm up a few hundred feet off the runway, I get hellaci= ous backfiring at full throttle. I can mitigate it a bit by throttling back t= o about 5100 rpm, and turning the mixture knob to near full rich. It's getti= ng to be a bit nerve wracking to take off thinking I've got it smoothed out a= nd then get a series of hand grenades going off under my butt. I'm thinking t= hat I'm still running too lean up at map address 106 or so. So, I go into th= e edit page and richen up the mixture around those addresses. I think I'm cr= eeping up on smooth full throttle running. >> =20 >> The good news is that my coolant runs at 175 degrees and oil at less- so t= he cooling is more than effective, I just need to close up my air inlet a bi= t or restrict the outflow. >> =20 >> Brian Trubee >=20 --Apple-Mail-3-675061533 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=utf-8
As Steve pointed out, "hand grenades" are not an indication of bad mixture.  I suspect bad crank sensor detection.  This can be caused by noise, warped trigger wheel, etc.  If the EC2 is an early version, it might need the Renesis CAS mod since the 3rd gen sensor is similar.  Btw, the 13BREW started in 93 so I'm still not sure which engine you have.

Tracy

Sent from my iPad

On May 13, 2011, at 8:34 PM, bktrub@aol.com wrote:

92 13BREW, normally alspirated, it has 28 lb primaries and 40 lb secondaries- That's what it came with.
 
Brian Trubee



-----Original Message-----
From: Tracy <rwstracy@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Fri, May 13, 2011 3:48 pm
Subject: [FlyRotary] Re: Engine Tuning

Brian,
   What engine are you using?  2nd gen, Renesis, etc.

Tracy

Sent from my iPad

On May 13, 2011, at 5:35 PM, bktrub@aol.com wrote:


Since the weather has been cooperating lately, I've had the opportunity to put a few more hours on the airplane. On the ground, I can go from an idle up to full throttle and the engine will be smooth. But when I take off, it seems that as soon as I'm up a few hundred feet off the runway, I get hellacious backfiring at full throttle. I can mitigate it a bit by throttling back to about 5100 rpm, and turning the mixture knob to near full rich. It's getting to be a bit nerve wracking to take off thinking I've got it smoothed out and then get a series of hand grenades going off under my butt. I'm thinking that I'm still running too lean up at map address 106 or so. So, I go into the edit page and richen up the mixture around those addresses. I think I'm creeping up on smooth full throttle running.
 
The good news is that my coolant runs at 175 degrees and oil at less- so the cooling is more than effective, I just need to close up my air inlet a bit or restrict the outflow.
 
Brian Trubee
--Apple-Mail-3-675061533--