X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=PNVxBsiC c=1 sm=1 tr=0 a=BMg5uwImetesxz4vmnqzIg==:117 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=x7bEGLp0ZPQA:10 a=Fee85h93u3AA:10 a=0o9FgrsRnhwA:10 a=J4CmDkmY71QA:10 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=7g1VtSJxAAAA:8 a=pQKv951lRULvkfkDO24A:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=uvz0Nx2_odRa5SUZ:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "lehanover lehanover@aol.com" Received: from sonic302-3.consmr.mail.bf2.yahoo.com ([74.6.135.42] verified) by logan.com (CommuniGate Pro SMTP 6.2.13) with ESMTPS id 12737776 for flyrotary@lancaironline.net; Fri, 05 Jul 2019 13:43:28 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.6.135.42; envelope-from=lehanover@aol.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aol.com; s=a2048; t=1562348591; bh=VOIINvQmb/wnBVPq4GPym5RjNKXIdRwJWpXcknUJfZ4=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject; b=JuzuaP2FAgl34Tan0VSkVEkxu+fLzCc+gjiiTgvcexD0ESVd0fUQtFo8fhA5/X4vR8bwIWTxEs0LVW/fp2YELS8vs9EO6yBXDgTsfqceFx+FxqV0wrWB7dfKto0d9uhxrUyKm+zZBlJdSqEHW/qC9ITrbNHoD4/OHKe8hFVG57UJxGGFGsjxlEhgbf0IF+NjDkebrd86/Vov4Gl/7ajMkQcV0v4LkIpsc2Q9TbG6Jb43LclKaoaUSyi1Pmbm78TlaCSapQ3CzLYKCeh20fPWv7fNBt2f6q0SXEeGlRRGMwmyIVN+H0SejJOvSx8VDl17l+6gf8cpi50BVIyWLAc71A== X-YMail-OSG: 64WyPKgVM1llG.8p064jT5mIkhdVDIy6gt_vDPMbbNqU_dy9fuEWpEExrqa5NHj 3JR5dKezcgAhsnQFxD245mFg39COqIHqCjYO.LVIgqqXh8QeLq0l0ML4hN6xhGRHn9YOIltzb.Im MrB4WrNor0.xqdRIbrNuI18gS89GDXgPvBzZyWUsoycfmTsTNnzMtth.Kl_Gxp.7TK4NvL3eXRk. uaBqyFOyKLCvFGNtclKtXZjkRy6dmpbWpeqOLCecx9xFuiFbOUR2cCmoL5WCQPGGcQ7.eZOca53P BgLSXb2r4hEYgQ4S66u9_NBKDSUH0_ZUt7QL2xMNmcUaLhLz0HsdUShCZDl_xsDGu82B4konK1kf QrqMw1ZpYgByaY_tjULjKMi_RhzcgMlpaHEyI1Ek5Yy90bcha1ZqW.HXw54En9SX0HxDZfrW6YvO knYO9X_xJLySs5Mzc1L9nFBZd8VJ4lMCq4Z3W4un___XJVncyUM5T_lQQp9pXh76fDHMQjMYg5i2 M0HBjiPECTa5eh3NUAEbOXvWRO0shx1tvy5DynL8xdEetyOShhZhoSgZvtXcPuN7cDweVRNjg.5X 3LbJKZfyMWqzfNIfjZx3eTB.van.E5xAYb1MN.vC.owtbYNqJan.hnuNt5j5RVxNnk_bfJWkspAa 6JZ42CRuPvHjDp8B3MJvJf6gI3RvkQWwrtCB1_woaLMIEOGIKKLCRjrz5OHGjov0l7jDiRl.EmoH eYWdpuLJT1ihh8dXt2mIUG5LklfC9U77Iebl4Z8YbyCJKl07Q6ewbOLzbOCYqZdoiaRS7wzqJ1JL 1hdsgHXpqVZK4o11PtSlHXiQucTPz8jGyFFeLocsqcv9VjfD8CkOYEv1iFa_EDxEAMlAIw934Tc5 vYqXnglA8bioEL7KelpE8d0m6pcflfGO_pijhyy5f4B9oCbUoVgdwtfgmSmVYE7bN7efqWhoSvNq N3xyyweXpMUCqCWW8HsBASk19OMNR4aLs_npeCCDA65WBhcBLZRV8PRrpJGNzUSbO6JatRstrKdX kUBFuHPL4sAtGk6GiFLxSDLSFLnJh7OgA31b7MCadaQeRnrvdQJZJaTpdQoiuZVQ_c3Uwp2vjEsi 3JVyAqJHs8X3C3rPqL1tWlPVkgQpmYWfgzZiXpUi1MfC1xsc099ciwrWDh9T8nNa6HOYBD6IB6Wi _htqtnC.UxxVcoA-- Received: from sonic.gate.mail.ne1.yahoo.com by sonic302.consmr.mail.bf2.yahoo.com with HTTP; Fri, 5 Jul 2019 17:43:11 +0000 Date: Fri, 5 Jul 2019 17:43:06 +0000 (UTC) To: flyrotary@lancaironline.net Message-ID: <62708416.2196556.1562348586557@mail.yahoo.com> In-Reply-To: References: Subject: Re: [FlyRotary] Re: timing on renesis engines MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_2196555_1639691242.1562348586555" X-Mailer: WebService/1.1.13913 aolloki Apache-HttpClient/4.5.7 (Java/1.8.0_144) Content-Length: 9102 ------=_Part_2196555_1639691242.1562348586555 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable What is the "Default" advance? Is that checked with a timing light? Easy st= arting can be up to 15 degrees of advance. For full power use up to 27 degr= ees of advance is good up to 10,500 RPM. Boosted engines require less advan= ce as boost increases. Because the effective compression ratio as well as c= harge temperature is going up. Very high boost my have advance closer to ze= ro. Advance is used to allow full combustionof the charge before the exhaus= t port opens. At higher pressure and temps the flame front speeds are incre= asing. So, less time is needed. Thus less advance is needed. Lowering intak= e air temps with an inter-cooler and adding water spray can allow higher bo= ost. Boosting to maintain sea level performance would probably not shorten engin= e life. Boosting for additional performance does shorten engine life. The k= ids get over 600 HP with boosted drag racing engines. This is fine if you o= nly need the engine for 9 seconds. You have to know what the actual advance= is to make any decision.=C2=A0 Mark the flex plate or flywheel teeth with = paint so you can check actual advance during any RPM. It is difficult to detonate an NA engine. It is not difficult detonate a bo= osted engine. Lynn E. Hanover In a message dated 7/5/2019 10:22:44 AM Eastern Standard Time, flyrotary@la= ncaironline.net writes: Steve,I=E2=80=99m running default timing or maybe 1 degree advanced. Early = on I experimented with 1-2 degrees advance for many flight hours and did no= t detect any noticeable change in engine performance. I did push the engine= to what I believe was detonation during a ground tuning session. I was tun= ing under boost (44=E2=80=9D MP) , 7000 rpm with a wideband O2 on each runn= er and adjusting Mode 9 and Mode 4. With F/A balanced between each rotor an= d EGT=E2=80=99s under 1600F I was trying to see if increasing timing would = lower EGT=E2=80=99s. F/A was in the 11=E2=80=99s. This was at the end of th= e session and the engine and supercharger were already hot. I think I had a= dded 4-5 degrees advance with no noticeable EGT decrease when I encountered= a mild bang or misfire. This condition was well above my 38=E2=80=9D MP li= mit I sometimes use for takeoff.=20 I=E2=80=99m curious about the dwell time setting difference between LS1 and= LS2 coils. I switched to LS2 coils sometime back with no failures to date.= I remember seeing an option setting in some of the code you or Finn posted= . Internet research indicates LS2 coils require less dwell time than LS1. P= ossibly 0.5-1 ms less.=20 Bobby=20 Sent from my iPad > On Jul 5, 2019, at 12:58 AM, Stephen Izett stephen.izett@gmail.com wrote:> > Hi there Guys> > Of the guys with Renesis= engines using EC2/3 can you comment on your timing settings.> I=E2=80=99ve= to date left the timing at the default setting figuring its set by the loc= ation of the CAS.> Not sure if the various coil options have different trig= ger timing latency.> > Thanks> > Steve Izett> > > > > --> Homepage:=C2=A0 h= ttp://www.flyrotary.com/> Archive and UnSub:=C2=A0 http://mail.lancaironlin= e.net:81/lists/flyrotary/List.html --Homepage:=C2=A0 http://www.flyrotary.com/Archive and UnSub:=C2=A0 http://= mail.lancaironline.net:81/lists/flyrotary/List.html ------=_Part_2196555_1639691242.1562348586555 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit
What is the "Default" advance? Is that checked with a timing light? Easy starting can be up to 15 degrees of advance. For full power use up to 27 degrees of advance is good up to 10,500 RPM. Boosted engines require less advance as boost increases. Because the effective compression ratio as well as charge temperature is going up. Very high boost my have advance closer to zero. Advance is used to allow full combustion
of the charge before the exhaust port opens. At higher pressure and temps the flame front speeds are increasing. So, less time is needed. Thus less advance is needed. Lowering intake air temps with an inter-cooler and adding water spray can allow higher boost.

Boosting to maintain sea level performance would probably not shorten engine life. Boosting for additional performance does shorten engine life. The kids get over 600 HP with boosted drag racing engines. This is fine if you only need the engine for 9 seconds. You have to know what the actual advance is to make any decision.  Mark the flex plate or flywheel teeth with paint so you can check actual advance during any RPM.


It is difficult to detonate an NA engine. It is not difficult detonate a boosted engine.

Lynn E. Hanover


In a message dated 7/5/2019 10:22:44 AM Eastern Standard Time, flyrotary@lancaironline.net writes:

Steve,
I’m running default timing or maybe 1 degree advanced. Early on I experimented with 1-2 degrees advance for many flight hours and did not detect any noticeable change in engine performance. I did push the engine to what I believe was detonation during a ground tuning session. I was tuning under boost (44” MP) , 7000 rpm with a wideband O2 on each runner and adjusting Mode 9 and Mode 4. With F/A balanced between each rotor and EGT’s under 1600F I was trying to see if increasing timing would lower EGT’s. F/A was in the 11’s. This was at the end of the session and the engine and supercharger were already hot. I think I had added 4-5 degrees advance with no noticeable EGT decrease when I encountered a mild bang or misfire. This condition was well above my 38” MP limit I sometimes use for takeoff.

I’m curious about the dwell time setting difference between LS1 and LS2 coils. I switched to LS2 coils sometime back with no failures to date. I remember seeing an option setting in some of the code you or Finn posted. Internet research indicates LS2 coils require less dwell time than LS1. Possibly 0.5-1 ms less.

Bobby

Sent from my iPad

> On Jul 5, 2019, at 12:58 AM, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>
> Hi there Guys
>
> Of the guys with Renesis engines using EC2/3 can you comment on your timing settings.
> I’ve to date left the timing at the default setting figuring its set by the location of the CAS.
> Not sure if the various coil options have different trigger timing latency.
>
> Thanks
>
> Steve Izett
>
>
>
>
> --

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