cb67rs1 Posted March 29, 2005 Report Share Posted March 29, 2005 Ok i dont know why but im sitting here thinking (gears are grinding) and i was just thinking about the firing on the banshee, im not a mechanical dumb ass by any means, but your spark plug suppose to fire at TDC right, so why can you swap the ignition wires and the shee still run? One pistion is up while one is down. im not seeing it right now. anyone know? Quote Link to comment Share on other sites More sharing options...
cb67rs1 Posted March 29, 2005 Author Report Share Posted March 29, 2005 come on someone has to know this Quote Link to comment Share on other sites More sharing options...
NYUK Posted March 29, 2005 Report Share Posted March 29, 2005 because one spark is wasted, they both fire at the same time. Quote Link to comment Share on other sites More sharing options...
racer Posted March 29, 2005 Report Share Posted March 29, 2005 yeppers. both plugs fire twice per revolution. the catch is that when the shift side fires it has compression and fuel. while at the same time the brake side plug is sparking as well, but that side is at the bottom of the stroke. meaning it has the fuel mixture, but not the required compression to ignite it. Quote Link to comment Share on other sites More sharing options...
jeepin247us Posted March 31, 2005 Report Share Posted March 31, 2005 Is this one of those cheap performance gain tricks?? I was reading the jetting "how to" forum and it noted that if you swith the coil wires you have to go up a size on your mains. Dosen't really make sense that switching the wires would increase performance but i dunno ...or do you do this in conjunction with a timing advance plate??? Quote Link to comment Share on other sites More sharing options...
racer Posted March 31, 2005 Report Share Posted March 31, 2005 I was reading the jetting "how to" forum and it noted that if you swith the coil wires you have to go up a size on your mains.347601[/snapback] not the plug wires. the ones that run into the coil itself. i believe they are blk/org. im not sure if it does anything though. try it and report back. Quote Link to comment Share on other sites More sharing options...
fixitrod Posted March 31, 2005 Report Share Posted March 31, 2005 In theory swapping those two wire shouldn't do a thing but some swear it does. I haven't done it. Quote Link to comment Share on other sites More sharing options...
SDD Posted March 31, 2005 Report Share Posted March 31, 2005 What actually happens is on one of the coil firings the voltage is positive (sparks from the center conductor of the plug to the ground strap) and on the second firing of the rotation a negative spark (from the ground strap to the center conductor). Swapping the plug wires from side to side will reverse which plug gets the negative spark. The same thing happens when you switch the wires going to the coil. As far as a power increase... I'll sell you some bottled air blessed by a budda that is known to add 15 hp to any machine by simply pouring this air into the gas tank. Anyone want to buy some??? $150 per bottle. Quote Link to comment Share on other sites More sharing options...
Rare Scottish Tree Badger Posted March 31, 2005 Report Share Posted March 31, 2005 What actually happens is on one of the coil firings the voltage is positive (sparks from the center conductor of the plug to the ground strap) and on the second firing of the rotation a negative spark (from the ground strap to the center conductor). Swapping the plug wires from side to side will reverse which plug gets the negative spark. The same thing happens when you switch the wires going to the coil. Really???? Is this a true fact. ... I assumed that the coil was constantly feeding sparks down both plug leads and from the centre electrode to the earth strap, firing twice per rev of each piston. I thought that if you swapped the coil feed wires around then this would cause all plug sparks to jump in reverse ie. from the earth strap to the centre electrode. ... So what you're saying is that the coil is constantly reversing polarity, firing +ve and then -ve. Rare. Quote Link to comment Share on other sites More sharing options...
jeepin247us Posted March 31, 2005 Report Share Posted March 31, 2005 What actually happens is on one of the coil firings the voltage is positive (sparks from the center conductor of the plug to the ground strap) and on the second firing of the rotation a negative spark (from the ground strap to the center conductor). Swapping the plug wires from side to side will reverse which plug gets the negative spark. The same thing happens when you switch the wires going to the coil. As far as a power increase... I'll sell you some bottled air blessed by a budda that is known to add 15 hp to any machine by simply pouring this air into the gas tank. Anyone want to buy some??? $150 per bottle. 347933[/snapback] LOL...throw in some muffler bearings and you got a deal!!!! Quote Link to comment Share on other sites More sharing options...
SDD Posted March 31, 2005 Report Share Posted March 31, 2005 Really???? Is this a true fact. ... I assumed that the coil was constantly feeding sparks down both plug leads and from the centre electrode to the earth strap, firing twice per rev of each piston. I thought that if you swapped the coil feed wires around then this would cause all plug sparks to jump in reverse ie. from the earth strap to the centre electrode. ... So what you're saying is that the coil is constantly reversing polarity, firing +ve and then -ve. Rare. 347969[/snapback] Actually think of it like this.... each spark plug fires once with a positive spark and once with a negative spark. With the crank being 180* firing one cylinder fires with a positive and one with the negative. There is a guy in India that designed a CDI that saved the wasted spark on each plug firing and it does provide a larger spark but you had to run to pick ups and two coils. The stock system works good enough as it is on a Banshee so it's not really needed. Quote Link to comment Share on other sites More sharing options...
JKJK Posted April 1, 2005 Report Share Posted April 1, 2005 Paul, i'm very intrigued by your theory.don't get me wrong i'm not doubting you,just confussed.So i tested a spark plug+the only continuity is between the electrode+the plug cap post.so how can a charge that originates from the coil travel in that manor.From ground(the strap)to the electrode.I'm really not to good with electronics+such but that just dos'nt seem possable.Every thing thats grounded on the bike would have to be energised no?Or am i just reading it wrong? Quote Link to comment Share on other sites More sharing options...
thegroup Posted April 1, 2005 Report Share Posted April 1, 2005 LOL...throw in some muffler bearings and you got a deal!!!! 347970[/snapback] dont forget the left handed screw driver u have to use, or is it a right handed Quote Link to comment Share on other sites More sharing options...
fixitrod Posted April 1, 2005 Report Share Posted April 1, 2005 It's just a transformer that gets discharged by the pickup coil near the flywheel. No reverse this and that. Both wires fire the same every 180 degrees. The cdi that uses two coils is used everyday on boats and cars. Not a cdi but the same tecnology. It's also used on street bikes. Transformers are basic. They step up or step down electricity. Here's a very basic theory for a transformer I got from http://www.coilwinder.com/Transformer%20Theory.htm A transformer is an energy transfer device. It has an input side (primary) and an output side (secondary). Electrical energy applied to the primary is converted to a magnetic field which in turn, induces a current in the secondary which carries energy to the load connected to the secondary. The energy applied to the primary must be in the form of a changing voltage which creates a constantly changing current in the primary, since only a changing magnetic field will produce a current in the secondary. A transformer consists of at least two sets of windings wound on a single magnetic core. There are two main purposes for using transformers. The first is to convert the energy on the primary side to a different voltage level on the secondary side. This is accomplished by using differing turns counts on primary and secondary windings. The voltage ratio is the same as the turns ratio. The second purpose is to isolate the energy source from the destination, either for personal safety, or to allow a voltage offset between the source and load. Transformers are generally divided into two main types. Power transformers are used to convert voltages and provide operating power for electrical devices, while signal transformers are used to transfer some type of useful information from one form or location to another. Written by Les Beckwith Quote Link to comment Share on other sites More sharing options...
fixitrod Posted April 1, 2005 Report Share Posted April 1, 2005 Here's an excellent site on how the ignition works if interested http://ourworld.compuserve.com/homepages/J...gnitionFAQ.Html Quote Link to comment Share on other sites More sharing options...
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