X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.4.51.81] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 930934 for flyrotary@lancaironline.net; Tue, 03 May 2005 09:55:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.4.51.81; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 3 May 2005 06:55:06 -0700 Message-ID: Received: from 64.4.51.202 by BAY107-DAV9.phx.gbl with DAV; Tue, 03 May 2005 13:55:06 +0000 X-Originating-IP: [64.4.51.202] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Renesis Build Options Date: Tue, 3 May 2005 09:55:00 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004D_01C54FC6.2B8C2190" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Tue, 3 May 2005 09:55:00 -0400 X-OriginalArrivalTime: 03 May 2005 13:55:06.0193 (UTC) FILETIME=[B6264C10:01C54FE7] This is a multi-part message in MIME format. ------=_NextPart_000_004D_01C54FC6.2B8C2190 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageFWIW, this is yet another clue that you had retarded timing on = old engine. The higher coolant temp is from more power and/or some = break-in friction but main thing is the lower EGT, which is a BIG = indicator of more ignition advance (a good thing until you get to = detonation point).=20 The other thing you have mentioned is the exhaust note. Retarded = ignition will have a deeper tone (many would think it better) but = healthy ignition advance will have a sharper edge to exhaust note and = less 'bottom end'. Your exhaust always sounded 'bottom heavy' to me. Lynn's comments on ignition advance matches what I have experienced. At = anything below 22" MAP, the advance can run as much as 30 deg BTDC. At = my typical cruise MAP is around 17-18" Hg where advance runs 32-33 BTDC. = =20 Tracy=20 That's interesting, Rusty I have noticed that my coolant temp is up and my EGT is down (about = 100 - 150F) over the old engine. I am speculating that the rise in = coolant temp and decrease in EGT MAY be due to better combustion (less = blow-by of gas into the exhaust) - but a little early to tell. Once the = engine has about 10 flying hours on it, the status should stabilize. = The coolant temp has come down about 5 -10F over what it was when I = initially fired up the engine. I hate to think that much heat increase is due to the friction of = breaking in all the seals. I am trying something different this time, I = am breaking the engine in using Mobile 1 Synthetic oil rather than the = mineral oil as I did previously. =20 Went to auto store to see if I could find a S&B filter - they once had = them, but had stopped carrying them. Claimed they were good filters. = Was going to check for me and see if anyone else in the local area = carried them. Might just end up with a K&N as they are probably easier = to find almost anywhere. But, I liked the funnel shaped inlet to the TB = that the S&B had and the K&N did not. Got to get that filter on before = Leon gets on my case {:>) Hope your water is going down Ed ------=_NextPart_000_004D_01C54FC6.2B8C2190 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
FWIW,  this is yet another clue that you had retarded timing = on old=20 engine.  The higher coolant temp is from more power and/or =  some=20 break-in friction but main thing is the lower EGT, which is = a BIG=20 indicator of more ignition advance (a good thing until you get to = detonation=20 point). 
 
The other thing you have mentioned is the exhaust note.  = Retarded=20 ignition will have a deeper tone (many would think it better) but = healthy=20 ignition advance will have a sharper edge to exhaust note and less = 'bottom=20 end'.  Your exhaust always sounded 'bottom heavy' to me.
 
Lynn's comments on ignition advance matches what I have = experienced. =20 At anything below 22" MAP, the advance can run as much as 30 deg = BTDC.  At=20 my typical cruise MAP is around 17-18" Hg where advance runs 32-33=20 BTDC.  
 
Tracy 
That's interesting, Rusty
 
I have noticed that my coolant temp is up and my EGT is down = (about 100 -=20 150F) over the old engine.  I am speculating that the rise in = coolant=20 temp and decrease in EGT MAY be due to better combustion (less blow-by = of gas=20 into the exhaust) - but a little early to tell.  Once the engine = has=20 about 10 flying hours on it, the status should stabilize.  The = coolant=20 temp has come down about 5 -10F over what it was when I initially = fired up the=20 engine.
 
I hate to think that much heat increase is due to the friction of = breaking in all the seals.  I am trying something different this = time, I=20 am breaking the engine in using Mobile 1 Synthetic oil rather than the = mineral=20 oil as I did previously. 
 
Went to auto store to see if I could find a S&B filter - they = once=20 had them, but had stopped carrying them.  Claimed they were good=20 filters.  Was going to check for me and see if anyone else in the = local=20 area carried them.  Might just end up with a K&N as they are = probably=20 easier to find almost anywhere.  But, I liked the funnel shaped = inlet to=20 the TB that the S&B had and the K&N did not.  Got to get = that=20 filter on before Leon gets on my case {:>)
 
Hope your water is going down
 
Ed
 
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