From: "Bobby J. Hughes" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: controller, sensor, wiring questions
References: <list-6917097@logan.com>
thread-topic: [FlyRotary] Re: controller, sensor, wiring questions
thread-index: Ac9/KMOSlvp9X193QK2i5ETM/iMHPA==
In-Reply-To: <list-6917097@logan.com>
Message-ID: <6DC6B510-5D7A-49DB-9CD5-5374432C5672@qnsi.net>
Date: Tue, 3 Jun 2014 07:38:46 -0500
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
MIME-Version: 1.0 (1.0)

I think Tracy's latest upgrade support wideband o2 auto tune without the EM.=
 Skip the narrowband and save some fuel $ during tuning. Your fuel savings w=
ill more than pay for the wideband and it's more useful in flight.=20

Bobby Hughes=20
Sent from my iPhone

> On Jun 3, 2014, at 6:12 AM, "Ed Anderson" <flyrotary@lancaironline.net> wr=
ote:
>=20
> Charlie, I'm a bit behind the times on Tracy's EC2 - but, last I knew it d=
id not have an auto tune feature (my info could easily be out of date), plus=
 it was my understanding that the auto tune feature required the EM2/3 as we=
ll as the EC.
>=20
> For best results the EFISM should be grounded to the aircraft electrical g=
round rather than to a ground pin on some other accessory.  It should not re=
ally make a difference, but closer to the battery negative lead the better i=
n my opinion.  Current thought seems to be not to use aircraft chassis as a p=
rimary electrical ground.
>=20
> PS Don't' forget to bring the EFISM with you.
>=20
> Ed
>=20
> -----Original Message----- From: Charlie England
> Sent: Monday, June 02, 2014 9:11 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] controller, sensor, wiring questions
>=20
> Currently building the wiring harness for the engine/controller, & have
> a few questions.
>=20
> 1st, is anyone running multiple devices that need to see the 1-wire O-2
> sensor? I need to feed both the EC2 (for auto-tune) and Ed A's monitor.
> Will there be a conflict if both are connected to the sensor at the same
> time?
>=20
> 1a (for Ed A), does your monitor care where it's grounded, for
> stable/accurate measurement? Both pin pairs 19/37 and pins 1/16 go to
> chassis ground, but the pairs are not common to each other in the EC2.
> Should it go direct to chassis, or to one or the other of the ground pairs=
?
>=20
> 2nd, I'd like to include Steve Boese's Rotary Copilot running on an
> iPaq, for data logging. I'm fairly confident that I'll need to switch
> pin 27 ( EC2 serial data in) between the two devices. Can pin 7 (EC2
> serial data out) feed both devices at once, or should it be switched, as
> well?
>=20
> 3rd, the high impedance injectors seem to draw less than 1 A each, when
> on. Are true 10A DC rated switches needed for injector disable, or would
> lower current, AC rated switches do? A true 10 A DC rated switch is not
> that easy  to find (or afford...), and with the draw being effectively
> AC (high speed switching) and <2 A for primary pair and secondary pair,
> it would seem that a 5A DC rated switch should get the job done safely.
>=20
> 4th, anyone have a source for the RX-8 crank angle sensor connector? I
> can solder directly to the sensor, but I'd rather use proper connectors,
> if possible.
>=20
> Thanks,
>=20
> Charlie
>=20
> --
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>=20
>=20
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>=20
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