what do the pulser and lighning coils do on the stator?

[Matt_E]

Thanks for clearing up the coil situation. Ha, I had it right the first time.

it would be very advantageous to NOT use a stator coil to provide power for the coil.
You will have less EM drag on the flywheel, and consistently powered spark independent of RPM.
The stocker does not.

 

[WaveDemon]

I don't want to have to charge my battery and I want a programable ignition for cheap. If it can't be done with the stock stator and flywheel then I might as well buy a working wax or advent ignition. I don't need the baddest ignition on the plannet. just one I can control.

 

[WaveDemon]

here's the goal:

custom programable (via laptop/pc) ignition
use as many stock parts as possible (flywheel, stator, coil, start/stop pod)
total price under $300

 

[keefer]

I guess you could remove the lighting coil and the charge coil from the stator and leave the pulser coil if the Wax ignition does not require the charge coil to provide it working voltage. I know the Enhancers use the battery DC for something but I am not sure if they actually need/use the charge coil voltage. Have you asked Wax about this? If you could remove the other coils it would reduce the drag and it should be good for a pony or two I would think.

This is interesting, I am curious to know what exactly is needed, If all you need is the pulser coil and could find a good light flywheel it should make for some quick rev with a programmable ignition.

 

[WaveDemon]

the "brain" of the programable ignition will be some form of megasquirt ($250ish assembled) or megajolt ($150 assembled). The microsquirt would be nice because it's so small but it starts at $350.

 

[Matt_E]

I don't believe that an Enhancer uses the charging coil. It draws it's CDI charge directly from 12V battery.

Tim, I bet the megasquirt could be adaptive enough to where one could use the stock trigger or aftermarket (read: MSD)

 

[WaveDemon]

I don't believe that an Enhancer uses the charging coil. It draws it's CDI charge directly from 12V battery.

Tim, I bet the megasquirt could be adaptive enough to where one could use the stock trigger or aftermarket (read: MSD)

sure it could use an msd trigger. it's just not part of my goal.

Early on i liked the idea of mega squirt with the idea of playing with efi later and only work on spark for now. I have since read that you can't get a good MAP reading on a ski motor so the only input would be a TPS (I wouldn't want to put a MAF sensor on a water craft). without being able to tell if the ski was under load the EFI would be no better than a mechnical injection and load up when jumping (this is my current understanding, it may change).

 

[WaveDemon]

I'm still waiting on an answer about using a pulser coil that only trigers twice a revolution from the mega squirt forum.

 

[WaveDemon]

OK, megajolt looks like it's out. it only has one input type wich is based on ford edis ignition. I don't want to do that big of a conversion.

 

[Matt_E]

what about a RAD or Jetinetics?

What about it? Those are flywheels only, the stator and CDI stay the same.

 

[waxhead]

good luck
you will need a test bed to spin it in as yamaha is not a dc signal its a rising and falling analogue style signal that tend to change slightly as you progress through the rev range
The componets are not that expensive this much i agree on it the the software to make it work
this is what costs the man hours developing it

the fact of how yamaha makes there ignitiosn with an analogue signal is that makes it hard for every one to make programable ignitions as you have to then convert to a digital signal and work out the correction factor through the rpm
I will be interested to see how you go
But believe me the ignitions like vilders (1000 usa) and the inferno that you
(600 usa) that you actually program are not easy to get right

An interesting fact with the yammies is they love the curve to come back up after the pipe has peaked in my experience i have found each yammie every likes it different as well all know that all yammies are different
you cant do this on any other ignition than a full programable one

 

[Matt_E]

Ha! I assume a trigger like the MSD TL triggers would work a lot better. Not dependent on RPM as much.

 

[waxhead]

or just a system like the 760 with the digital pickup

 

[WaveDemon]

Ha! I assume a trigger like the MSD TL triggers would work a lot better. Not dependent on RPM as much.

how often do the triggers fire?

it seems the most popular way to get the MS's to work is to your a 36-1 toothed wheel and a sensor to count the teeth. I'm trying to get answers on an analog only input.

 

[WaveDemon]

or just a system like the 760 with the digital pickup

thats not a bad idea either. Im trying to keep it as plug and play as possible though.

Still in reasearch mode. :smile:

 

[waxhead]

triggers fire every 180 degrees

my sxr ignition system i have will work with the 760 flywheel on a yamaha so they are much the same
its just the wiring loom thats different

 

[Matt_E]

How often the triggers fire depends on how you set it up. Usually, every 180 degrees. The dual channel TL fires once in 360 degrees.

This is valid only for dual cylinders - a triple will fire every 120 degrees. (Or 360 for a triple channel)

 

[Matt_E]

I have been toying with the idea of designing and building a total loss brain. I dread the day my MSD unit will die - I don't want to fork over the ridiculous amount of money a replacement from MSD will cost.

So I started checking into it.....a CDI circuit (charges and discharges the coil - makes it spark) is not that complex.
Then I would need a programmable digital circuit that takes a signal from the TL triggers, produces a delay according to current RPM (timing curve), and triggers the CDI discharge.
The concept is straightforward. I am not looking to reinvent the wheel - I want to be able to use MSD's flywheel, the triggers, and their coil. Why replace what's good.
The digital logic and programming for the timing curve is simple (in concept) - it's just a PLC with a programmable lookup table and a reliable delay timer. Granted, the delay and lookup tables need to be tested thoroughly to make sure the curve is accurate and repeatable.
I don't want to get into too many details (boring).

The nice thing is, you can PLC's fairly cheap. Add to that a (cheap) wireless IR interface, and you can program the thing wirelessly from your laptop.

Obviously, that's not what you had in mind at all, Tim. It's just something I have been thinking about for my application.
Still, it's nice to put heads together and discuss possibilities.

 

[waxhead]

replace what's good.
The digital logic and programming for the timing curve is simple (in concept) -
QUOTE]

yup there you go
in concept
but you have to figure out the correction curves for them and that takes awhile

 

[WaveDemon]

the thing is the people who use this other brain seem to thing more "triggers" are neccissary to measure acceleration more accuratly. I'm trying to push them back in the direction of useing the pulser coil.


On a side note, is the 760 flywheel cover bigger than the 701?