Aside from the higher spark current from the D585s eroding the sparkplug electrodes more quickly; do we have evidence that it will, in fact, improve performance? Perhaps it is a cure for SAG.
BTW; my 6 D581 coils (Mounted atop my 20B) have been in use since my first engine start back in about 2001. They have survived many hours of ground test runs where cowl temps exceeded 150F (at times I’m 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 during 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’d 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] On 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 them 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 <SBoese@uwyo.edu> wrote:
I have about 100 hours on D585 coils and have had no problems with them so 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] On 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 <keltro@att.net> wrote:
A little info regarding the various GM ignition coils that many of 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=-6218245369765754251&hl=en
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo