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
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.......
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo