Just wondering if anyone has probed the CDI output to the coils on their bike with an oscilloscope? I'm wondering if its a true square wave signal, or if its sloppy. I can get a reading off my bike with my scope in a week and a half, but I'd like to know what I'm gonna see so I can start designing a circuit for something.

 

what are you looking at making??? hmmmm???

 

I have not done it with my F4i, but I helped a friend when he was doing a custom fuel injection system. It was pretty much a straight square wave with some overshoot on the leading and trailing edges of the pulse. We were using a tektronix digitizing scope, so it may have smoothed out some of the roughness.

And yea... what are you trying to make?

 

investigating the possibility of a homemade ignition amplifier and interrupt.

 

I guess the next question is why Are you not getting a powerful enough spark? As for the interrupt.... for full throttle shifting or something?

 

every other gas engine vehicle I have owned got 1-2 mpg better fuel mileage and burned cleaner after I put an MSD box on it. This time though I'm strapped on cash since I just moved, so figured I would try to build one this time around.

It originated as a full throttle shifter idea, and has progressed from there. Full throttle shifter, maybe an automatic shifter, ignition amplifier. I cant just be done with a vehicle. If I get done with the mods I wanted to do, then I think up more.


-edit- freakin typos

 

I'm not sure how the F3's are setup, but are they direct ignition coils? I have an F4i and it has ignition coils, not a distributor. Wouldn't an ignition amplifier be pointless on a direct ignition coil system since the coil sits directly on top of the spark plug? Again, I don't know how an F3 is setup, and I don't claim to be an expert on ignition systems

 

the coils are under the airbox, with plug wires going to the spark plugs.

 

Gotcha. Good luck with your project!