From: "Charlie England" <flyrotary@lancaironline.net>
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Date: Mon, 02 Jun 2014 20:11:14 -0500
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To: flyrotary <flyrotary@lancaironline.net>
Subject: controller, sensor, wiring questions
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Currently building the wiring harness for the engine/controller, & have 
a few questions.

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?

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?

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?

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.

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.

Thanks,

Charlie