X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qe0-f41.google.com ([209.85.128.41] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTPS id 6651146 for flyrotary@lancaironline.net; Mon, 23 Dec 2013 20:11:21 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.128.41; envelope-from=ceengland7@gmail.com Received: by mail-qe0-f41.google.com with SMTP id gh4so5934816qeb.28 for ; Mon, 23 Dec 2013 17:10:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type; bh=/AWKQ4HnC814bxLY61u0jSkm11sgxJlG/mA7ITts8Ec=; b=CqCOLqnVmBPnuBVUMSnMcOAXvqsgUsvpJ9oa8RX6si9lgz2/EPn+f7qzkskc4mzuCg czyY8NrRjFi4A55SrbgsR9riFxS94d+lb+4ymHLjowS8cwBgWgCbuVKqrmHuPe9ELL3U mYNr0duVquVC05gEHG6alv0hJYlGyqULeAWqhhJ8H/2oH5luNCI9HgjSTlbLKRGwXxab zB3pICpf0ognf6ocgmO8V8AgCY0Tvc/wBJUizreIXMv/Te2YJRSZhhHqGtX+IWP7vJe5 YjRDa8pJ03NfuCNEQkpRAqUcwHPDVjMw51IR4oPT6xqaztSB4CZ81ovLungkO5BlgkZ5 XERw== X-Received: by 10.224.167.15 with SMTP id o15mr47613968qay.96.1387847448021; Mon, 23 Dec 2013 17:10:48 -0800 (PST) Return-Path: Received: from [192.168.10.7] (adsl-98-95-175-117.jan.bellsouth.net. [98.95.175.117]) by mx.google.com with ESMTPSA id a5sm33606034qae.2.2013.12.23.17.10.46 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 23 Dec 2013 17:10:47 -0800 (PST) Message-ID: <52B8DF23.7030501@gmail.com> Date: Mon, 23 Dec 2013 19:10:59 -0600 From: Charlie England User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Renesis with 76 X 88 prop References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------060008000201070103090604" This is a multi-part message in MIME format. --------------060008000201070103090604 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit How rich are you running? If it's really rich, you may have fuel burning in the exhaust even if timing is correct. Can you lean at near full power & get a drop in egt without a significant loss of power? Also, even conventional a/c engines see egt's all over the map from engine to engine, due to timing, mixture, and even position of the probes (distance from port, exposure to exhaust stream, etc) and variation in the probes themselves. Of course, with the P-port engine, you might just be making more power. :-) Charlie On 12/23/2013 5:39 PM, Neil Unger wrote: > Dennis, > I have a P ported renesis and am seeing EGT up to 1850. > Having talked with various people with far more knowledge than myself, > who suggest it may be that the spark should be advanced up to around > 30 BTDC. to reduce the EGT. Rather than destroy the motor finding out, > I am looking at getting the engine onto a dyno to clarify the timing > and EGT’s. Should be very interesting to say the least. No one works > here until the first half of Jan has passed in this banana republic of OZ. > *From:* Dennis Havarlah > *Sent:* Tuesday, December 24, 2013 8:07 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: Renesis with 76 X 88 prop > I've had server issues this week and could not send this until today. > Bill > I actually have the RD1-C PSRU. (My Bad.) Tracy started selling these > about 6-7 years ago for use with the Renesis. > The prop turns clockwise from the pilot's seat view. > I normally see EGT's in the high 1750 F. during full power takeoff and > early climb. It will go above 1800 F. if the mixture is real close to > best power. I have my EM-2 set to warn me if the EGTs go above 1800. > Dennis H. > --------------060008000201070103090604 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
How rich are you running? If it's really rich, you may have fuel burning in the exhaust even if timing is correct. Can you lean at near full power & get a drop in egt without a significant loss of power?

Also, even conventional a/c engines see egt's all over the map from engine to engine, due to timing, mixture, and even position of the probes (distance from port, exposure to exhaust stream, etc) and variation in the probes themselves.

Of course, with the P-port engine, you might just be making more power. :-)

Charlie

On 12/23/2013 5:39 PM, Neil Unger wrote:
Dennis,
              I have a P ported renesis and am seeing EGT up to 1850.  Having talked with various people with far more knowledge than myself, who suggest it may be that the spark should be advanced up to around 30 BTDC. to reduce the EGT. Rather than destroy the motor finding out, I am looking at getting the engine onto a dyno to clarify the timing and EGT’s.  Should be very interesting to say the least.  No one works here until the first half of Jan has passed in this banana republic of OZ.
 
Sent: Tuesday, December 24, 2013 8:07 AM
Subject: [FlyRotary] Re: Renesis with 76 X 88 prop
 
 
 
I've had server issues this week and could not send this until today.
 
Bill
 
I actually have the RD1-C PSRU. (My Bad.) Tracy started selling these about 6-7 years ago for use with the Renesis.
The prop turns clockwise from the pilot's seat view.
I normally see EGT's in the high 1750 F. during full power takeoff and early climb. It will go above 1800 F. if the mixture is real close to best power. I have my EM-2 set to warn me if the EGTs go above 1800.
 
Dennis H.
 

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