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Post by dudemanmandude on Mar 21, 2013 19:24:51 GMT -5
Hey everyone,
I've searched this and multiple other forums and can't find the answer to this simple question. Here's the situation:
Recently one of the bolts that mounts my stator to the crank case came loose and was ripped from its hole and chewed up my stator (8 pole). I removed the junked stator and re-threaded the stripped bolt hole with success. The new stator arrived today but when positioned, none of its coils points toward the pickup trigger like the old one. Does the angle/orientation of the coils matter?
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Post by woowilly on Mar 21, 2013 22:33:05 GMT -5
If running a DC CDI, No orientation is required other than to physically attach it.
If running an AC CDI you have to have the CDI charge coil(s) line up with any of the magnets timed so it's the same as the original position.
8 pole flywheel = 8 positions.
( actual number of magnets present on flywheel. not number of stator poles. some setups use a non-matching counts.)
A few degrees advanced from any of the 8 possible ideal positions won't matter much.
( The leakage current(s) will only have time to discharge the CDI capacitor slightly after it's fully charged and before the trigger signal hits.)
If the leakage currents are low enough, you could go as much as 180 degrees advanced
with no problem.
Not a good idea to go any more than that due to getting too close to the point where the CDI is not yet done firing off the sparkplug of the previous firing,
( It's a wasted spark setup, So it also fires between the exhaust and intake strokes. )
Stator is advanced by having the stator positioned more in the direction opposite the crankshaft rotation.
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Post by alleyoop on Mar 21, 2013 22:46:36 GMT -5
The stator goes on in a fixed position 2 bolts hold it on they are not slotted to move it left or right. If you want to change the timing you have to slot the holes on the pickup coil to slide it left to advance or right to retard. They also have OFFSET Woodruff Keys to offset the FLywheel which does the same thing.
Alleyoop
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Post by chihuahuas on Mar 22, 2013 9:17:50 GMT -5
Hook it up and it should run fine. There are 4 charge passes every one revolution per spark so the position /orientation of the charging coil relating to the firing point timimg has no effect. It simply charges a cap and the trigger point discharges the cap to collapse the field in the coil to create a spark.
CDI
Capacitor Discharge Ignition
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Post by dudemanmandude on Mar 22, 2013 18:20:19 GMT -5
Thank you for the info, people!  So chihuahuas, if I understand you correctly, the relationships between the trigger pickup to the the flywheel and the flywheel to the coils of the stator are pretty much irrelevant when it comes to proper function of the system (creating spark and charging the battery)? I've decided to post a picture or two for both clarification, as well as to ask another follow-up question. ![]() coil ends.jpg[/img] In one picture you can see how the mounting bolt holes don't line up the same with the the coil orientation in the new stator as they did with the old one (btw, I salvaged the copper off the old stator). This is why none of the coils of the new stator points to the trigger like the old one did. The other picture has to do with my follow-up questions: I don't know the proper terminology for what I'm referring to here, but hopefully what I can describe in the context of the picture will suffice. See how there is less metallic surface area on the ends of the coils of the newer stator (below) than those of the old stator (above)? Does this affect performance? Also, the new stator's coils seem to be wrapped more sparsely with copper than were the older one's. Are there any downsides to that? Attachments:
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..BAD TO THE BONE..
