Twinspark spark timing offset

[Twinspark]

Hello,

can MS3x run 8 spark channels for a 4 cylinder, with the two sets of four plugs timed a degree or two apart?

[suberimakuri]

I wonder if the functionality for rotary trailing spark would work here. You may be limited to wasted spark rather than cop though.

[Twinspark]

Thanks Suberi,

what about oddfire phasing?

[Twinspark]

From TS manual:
Custom oddfire angles in sequence from #1
• 1st – Number of crank degrees engine rotates from spark A to spark B;
• 2nd – Number of crank degrees engine rotates from spark B to next cylinder;
• 3rd – Number of crank degrees engine rotates from spark C to next cylinder;
• 4th – Number of crank degrees engine rotates from spark D to next cylinder.

Set up something like this:

Cylinder 1 A and B - 2 degrees
B to C - 178 degrees
Cylinder 3 C and D - 2 degrees
D to E - 178 degrees
Cylinder 4 E and F - 2 degrees
F to g - 178 degrees
Cylinder 2 G and H - 2 degrees

Is this likely to work?

[suberimakuri]

You're welcome.
In fact you could probably use trailing spark like on a quad rotor and still have cop mode as such.
Nothing wrong with wasted spark though.

Sorry I don't know anything about odd fire.
2 degrees is not a lot of split?

What's the engine?

[suberimakuri]

Actually it looks like trailing timing support is limited to rotary engines only and rotary must be selected in the engine settings.
Perhaps a feature request to enable this might work for you?

[Matt Cramer]

Currently trailing spark is a rotary-only feature. It may be added for piston engines in the future.