flyrotary@lancaironline.net Mailing List Archive

There's never a simple yes or no answer to this stuff. The EC2/3 can move the entire timing curve up or down by 10 degrees in 1 degree steps. But, if for instance you retarded the trigger wheel by 10 degrees and made up for it by advancing the EC2/3 timing adjustment by 10 degrees, the controller would probably be unable to deliver the full range of ignition advance when at low manifold pressure (same as 'vacuum advance' in a car). So, I would recommend that the trigger wheel not be moved from the stock location.

Tracy

On Sat, Apr 30, 2011 at 12:41 AM, Kelly Troyer <keltro@att.net> wrote:

Tracy,

I will try to be more clear............If the stock position of the sensor is moved slightly

in relation to the trigger wheel can the EC2-3 compensate or does the trigger wheel

have to be repositioned to regain the stock timing relative to TDC ?...............

Thanks,

Kelly Troyer

"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo

From: Tracy <rwstracy@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Fri, April 29, 2011 8:24:34 PM
Subject: [FlyRotary] Re: Back-plate Photos

Tracy,

I have a couple of questions for you about your RV4 Renesis engine.................Are you using the stock Renesis ignition sensor

and is it mounted mounted on the Renesis front cover mounting ??..............When the Renesis trigger wheel and sensor are in the

stock position what is the engine timed at (BTDC) before any computer (stock and/or EC2-3) correction (static timing) ??..........

Thanks,

Kelly Troyer

Yes, my Renesis has the stock crank position sensor in stock location.

I may not understand your timing question Kelly but there simply is no correlation between the crank position sensor timing and any ignition timing. The computer is just getting an arbitrary (but well defined) crank position from the sensor & trigger wheel. It can make the timing anything it wanted to with that information. Without the computer there can be no such thing as static ignition timing with a trigger pattern from the RX-8 setup.

Tracy