X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-wy0-f180.google.com ([74.125.82.180] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4662743 for flyrotary@lancaironline.net; Mon, 03 Jan 2011 15:53:17 -0500 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.180; envelope-from=rwstracy@gmail.com Received: by wyb28 with SMTP id 28so13644469wyb.25 for ; Mon, 03 Jan 2011 12:52:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=1hhMXTGYGtcTHOvAN/5OJbyv8t3uI35I91iRlBXZ9Cc=; b=KxA6FbqIAxk88US/6IsCm+SMMSZwjgf0ZntTHjQTThbtJx6FCyd0LmISyeUwGWqbvW W/07V7oPA06k3cbwe5eSMmnKhnBaUmfaYZAksmc5YoMEYiFul1WvOhgtKe1u4BFYZguf wENbmmo/7lPEPEEMvxWDOdyxuj4rgdLwAPmlw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=XGTIpzuz8EnR3oPLahKzSd4cyETYaiZ0NUoQvdEs+xC25WcidEiivX7lnFpU5whIdq AGqk809nXZG/rBJjuFBfHSemIEze9f7LKNvYeBS4nrHZTA3vVGX/N+Ys4IiSZQTdtxEP FlO15i7fbzdHVEhbPfM0yl6MA+pWp0J0DdpqQ= MIME-Version: 1.0 Received: by 10.216.141.16 with SMTP id f16mr20741372wej.80.1294087961924; Mon, 03 Jan 2011 12:52:41 -0800 (PST) Sender: rwstracy@gmail.com Received: by 10.216.200.158 with HTTP; Mon, 3 Jan 2011 12:52:41 -0800 (PST) In-Reply-To: References: Date: Mon, 3 Jan 2011 15:52:41 -0500 X-Google-Sender-Auth: D-FBi_1s2VAtkJ_uepO6pfuqi2Q Message-ID: Subject: Re: [FlyRotary] Re: GM Coil Comparison From: Tracy To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e6d77fa84754bd0498f75544 --0016e6d77fa84754bd0498f75544 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I was a little pessimistic (or optomistic depending on how you look at it) on the life time on my D581s. Reviewed the data log from previous RV4 flights and see that my in-flight under cowl temps were running from 145F (winter with OATs around 50 - 60) to 187 F on hot summer days. My coils are on top of the engine like Al's but that is an area of very little airflow due to the location of my rads and cooling outlet. That can be as important as the temperature. I intensionally allowed for no 'extra' airflow other than what flows through the rads & oil cooler to reduce cooling drag. Tracy On Mon, Jan 3, 2011 at 2:38 PM, Al Gietzen wrote: > Aside from the higher spark current from the D585s eroding the sparkplug > electrodes more quickly; do we have evidence that it will, in fact, impro= ve > performance? Perhaps it is a cure for SAG. > > > > BTW; my 6 D581 coils (Mounted atop my 20B) have been in use since my firs= t > engine start back in about 2001. They have survived many hours of ground > test runs where cowl temps exceeded 150F (at times I=92m sure reached 190= + for > short periods); and 200 fight hours with nary a single failure. In-cowl > temps are typically about 150 during climb-out; and generally 120-140 dur= ing > cruise. > > > > Perhaps it helps that they get plenty of air flow (during flight) being > pretty much in blast from the rad exit. I generally run the rad aux fan = for > awhile after shutdown; but I=92d guess high temp is less of an issue when= they > are not operating. > > > > Al > > > > -----Original Message----- > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Tracy > *Sent:* Monday, January 03, 2011 8:13 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: GM Coil Comparison > > > > I highly recommend the air cooled enclosure as Steve Boese (and I) use. > This is especially important on the D581 and the stock RX-8 Renesis coils= . > The Renesis coils have a fairly high failure rate even on the car. The > D581 would only last a few hours at 150 F but I have about 250 hours on t= hem > with the airbox at 120F. > > Don't forget to do the coil disable test to check for failed coils prior = to > every flight. > > Tracy > > On Mon, Jan 3, 2011 at 10:53 AM, Steven W. Boese wrote: > > I have about 100 hours on D585 coils and have had no problems with them s= o > far. The temperature in their airblasted enclosure is usually less than = 100 > degrees in flight and has gotten up to 120 degrees during taxi. > > > > Steve Boese > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Tracy > *Sent:* Monday, January 03, 2011 8:41 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: GM Coil Comparison > > > > I have a set of the D585 coils but have only evaluated them on the bench > for compatibility with the EC2/3 (they are). > > I do know that the previous version of the truck coils (D581) are not as > reliable as the D580 (Corvette) coils. > > Tracy > > On Sun, Jan 2, 2011 at 2:16 PM, Kelly Troyer wrote: > > Happy New Year Group, > > > > A little info regarding the various GM ignition coils that many o= f > us use on our > > Rotary engines with Tracy's EC2 and EC3 boxes that I thought might be of > interest > > to those that have not seen it before.............Tracy would like your > comments on the > > the apparently big performance difference between the LS1 verses the LS2 > Truck > > coils and if an upgrade would be worth the $$ especially for those of us > that have > > or plan on Turbocharging in light of the higher combustion chamber > pressures....... > > > > > > http://www.megamanual.com/seq/coils.htm#ls1 > > > > http://video.google.com/videoplay?docid=3D-6218245369765754251&hl=3Den# > > > > > Kelly Troyer > *"DYKE DELTA JD2" **(Eventually)* > > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > > "TURBONETICS"_TO4E50 Turbo > > > > > --0016e6d77fa84754bd0498f75544 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I was a little pessimistic (or optomistic depending on how you look at it) = on the life time on my D581s.=A0 Reviewed the data log from previous RV4 fl= ights and see that my in-flight under cowl temps were running from 145F (wi= nter with OATs around 50 - 60) to 187 F on hot summer days.=A0=A0 My coils = are on top of the engine like Al's but that is an area of very little a= irflow due to the location of my rads and cooling outlet.=A0 That can be as= important as the temperature.=A0=A0 I intensionally allowed for no 'ex= tra' airflow other than what flows through the rads & oil cooler to= reduce cooling drag.

Tracy



On Mon, Jan 3, 2011 at = 2:38 PM, Al Gietzen <ALVentures@cox.net> wrote:

Aside from= the higher spark current from the D585s eroding the sparkplug electrodes more quickly; do we have evidenc= e that it will, in fact, improve performance? Perhaps it is a cure for SAG.

=A0=

BTW; my 6 = D581 coils (Mounted atop my 20B) have been in use since my first engine start back in about 2001. =A0Th= ey have survived many hours of ground test runs where cowl temps exceeded 150F= (at times I=92m sure reached 190+ for short periods); and 200 fight hours with = nary a single failure. In-cowl temps are typically about 150 during climb-out; a= nd generally 120-140 during cruise. =A0

=A0=

Perhaps it= helps that they get plenty of air flow (during flight) being pretty much in blast from the rad exit.=A0 I generally run the rad aux fan for awhile after shutdown; but I=92d guess high temp is less of an issue when they are not operating.

=A0=

Al<= /font>

=A0=

-----Original Message-----
From: Rotary motors in air= craft [mailto:fl= yrotary@lancaironline.net] On Behalf Of Tracy

Sent: Monday, January 03, 2011 8:13 AM
To: Rotary motors in aircr= aft
Subject: [FlyRotary] Re: G= M Coil Comparison

=A0

I highly recommend the air cooled enclosure as Steve Boese (and I) use.=A0 This is especially important on the D581 and the stock RX-8 Renesis coils.=A0 The Renesis coils have a fairly high failure rate even on the car.=A0=A0 The D581 would only last a few hours at 150 F but I have about 250 hours on them with the airbox at 120F.

Don't forget to do the coil disable test to check for failed coils prio= r to every flight.

Tracy

On Mon, Jan 3, 2011 at= 10:53 AM, Steven W. Boese <SBoese@uwyo.edu> wrote:

I have about 100 hours on D585 coils and have had no problems with them so far.=A0 The temperature in their airblasted enclosure is usually less than 100 degr= ees in flight and has gotten up to 120 degrees during taxi.

=A0

Steve Boese

=A0

= From: R= otary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy
Sent: Monday, January 03, = 2011 8:41 AM
To: Rotary motors in aircr= aft
Subject: [FlyRotary] Re: G= M Coil Comparison

=A0

<= font face=3D"Times New Roman" size=3D"3">I= have a set of the D585 coils but have only evaluated them on the bench for compatibility with the EC2/3=A0 (they are).

I do know that the previous version of the truck coils (D581) are not as reliable as the D580 (Corvette) coils.

Tracy

On Sun, Jan 2, 2011 at= 2:16 PM, Kelly Troyer <keltro@att.net> wrote:

Happy=A0New Year Group,

=A0

=A0=A0=A0=A0=A0=A0=A0 A little info regarding the various GM ignition coils that many of us use o= n our

Rotary engines=A0with Tracy's EC2 and EC3 boxes that I thought might be of int= erest

to those that have not seen it before.............Tracy would like your comments on the

the apparently big performance difference between the LS1 verses the LS2 Truck<= /span>

coils and if an upgrade would be worth the $$ especially for those of us that have

or plan on Turbocharging in light of the higher combustion chamber pressures.......=A0=

=A0

=A0

=A0


=A0

Kelly Troyer=
"DYKE DELTA JD2" = (Eventually)

"13B RO= TARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBON= ETICS"_TO4E50 Turbo

=A0

=A0


--0016e6d77fa84754bd0498f75544--