WICO COIL

[pd]

Product Information

NOVA II  • NEW IMPROVED SMALLER SIZE  • ABLE TO FIT IN AREAS THAT THE ROTARY #1986 NOVA WOULD NOT  • USED IN 4 & 2 CYCLE GASOLINE ENGINES  • SUITABLE FOR 2 & 3 LEG IGNITION COILS IN SINGLE CYLINDER ENGINES  • NOT RECOMMENDED FOR USE ON ENGINES EQUIPPED WITH BATTERY IGNITION OR FLYWHEELS WITH MULTIPLE MAGNETS

Hmmm ...

Still , the idea of electronic ignition is interesting .

[bohica2xo]

PD:

The multiple magnet warning comes from the fact that it will fire when the magnets cross the coil.  On a 2 stroke with balance magnets like old Echo stuff, this means the plug fires a second time @ bdc.  Harmless in those motors.   On stuff with 6 sets of magnets used to produce DC power, there will be misfires of course.

The little chinese 2 strokes we use in the bicycles fire every 180 degrees from the factory.   I would try one on the simplex engine without a second thought.

B.

[pd]

Here's a pic of my flywheel ( I've since secured the magnet ) . The magnets seem to be 180° apart , so I would think the NOVA II would work . It might just be worth a shot .



Pete .

[Mike Sal]

So, what we're looking at here is a trigger device?  One wire to ground & the other to the coil?
Mike Sal

[pd]

Mike ,

The Nova II is a solid state ignition module that replaces both the points and condenser .  It's signal and 'power' are generated by the coil when the magnets pass . The same type of module has been used for over 30 years by Honda and other manufacturers in a lot of  motorcycles . My CB750 had a pair of them . They are very reliable and never need attention , other than keeping them fairly clean so heat can dissipate .

Here's the wiring instructions and a link to the same :



http://gardentractorpullingtips.com/images/novainst.gif

Pete .

[simplex1957]

? How would you set the timing?

 RC

[Mike Sal]

The timing doesn't change.  The only way to change or adjust the timing on our bikes is to rotate the coil, relative to the position of the crank.  If you've ever been around an old boat motor, you'll notice that part of what happens when you crank the throttle is that the entire magneto plate rotates to advance or retard the spark.

If I had access to a spare simplex motor, and lots of time, I'd like to see if a boatmotor magneto plate & flywheel could be adapted. 
Mike Sal

[pd]

If you'd have said something last Winter , Mike . I would have given you the plate I had :





It was even made by RE Phelon . Look by the coil center ...
I don't know if you could make something like that work , but , it would be fun trying .

Pete .

[simplex1957]

OK, But the points actually dictate when the plug fires, and a small amount of timing
adjustment can be made by the gap setting.
RC

[pd]

OK, But the points actually dictate when the plug fires, and a small amount of timing
adjustment can be made by the gap setting.
RC

True , when the points open , the plug fires .
That open , which is not adjustable , is controlled by the cam on the crank shaft , NOT the amount that the points open .

[simplex1957]

Yea, I understand that, but, if say you set the points at .025 the point cam would start to open the points a little soner than if set at .015.

[pd]

Yea, I understand that, but, if say you set the points at .025 the point cam would start to open the points a little soner than if set at .015.

I see what you're saying . But , would that be any measurable amount ? And , if so , how much ?

[simplex1957]

Thats a good question, I have never put a degree wheel on any thing to find out.
Maybe I'll do that this winter when I restore my 1955 just to satisfy my curiousity.

[pd]

I hope you do . Kill two birds ... your curiosity and mine .

I don't have my bike with me this Winter or I'd likely do it myself .

Pete .

[Gramps]

The point gap can make a big difference in the timing.
I may be a little dence but I don't see how you adjust the timing with the Nova ll.
The points are elimated so what times the spark?
 Gramps