cb550 four ignition question

[Bert Jan]

Could it be possible to run a cb550 on 1 coil, splitting the 2 wires, making it four wires from one coil?
because the cb's fire at BDC and TDC, i thought it could be done?

asking because i'm working on a digital ignition system with a buddy of mine and its easier to do if there's only one coil to be fired.

 

[ronnie]

I'm not expert but it could work at lower RPM but when those go up the coil might not have enough time to "charge" up to fire the next subsequent spark or it may not be a strong spark which will decrease your engines performance.. There is a reason they chose two coils I would imagine. I read about coils last time I was on the ship and thats the gist of that question. It could work for you, I'm no expert but that is something that will happen with a single coil..

 

[Bert Jan]

The coils fire at btc and tdc both. Essentially they're doing exacly the same as with one coil. So recharge would not be a problem as they load fast enough now aswell.

Load issue might be a problem as there is twice the OEM amount of current asked by adding 2 extra plugs.

Anybody else?

 

[Bert Jan]

Like this;

 

[mach]

If you ran it off one coil you would be firing all cylinders at once. 1 and 4 would be tdc, 2 and 3 would be bdc. Every other cycle would result in a fire immediately after the intake stroke, not sure that would be a good thing.

Also, you would be firing at twice the rate that your charging system was designed for.

 

[ronnie]

Oh for some reason I was thinking 2 cylinders... Haha haha ahhhh..........

Sent from my Galaxy Nexus using Tapatalk 2

 

[Kanticoy]

Your biggest problem will be load on the coil. You would need to use a very high voltage coil to make it work, like something out of an auto. Cars do this all of the time, but they use a single coil to fire a distributor, so it doesn't load the coil as much as it could. My question would be how you would split the HT leads from one wire to two?

 

[Prutsert]

I think the coil would "discharge over the spark plug with the lowest resistance (or the smallest gap), so the engine would run on 2 cylinders....

 

[Bert Jan]

Your biggest problem will be load on the coil. You would need to use a very high voltage coil to make it work, like something out of an auto. Cars do this all of the time, but they use a single coil to fire a distributor, so it doesn't load the coil as much as it could. My question would be how you would split the HT leads from one wire to two?

Well, i could solder or crimp it. Might start a topic about wich one is better

 

[ronnie]

After all this is said and done, you have to ask yourself two questions...Is all this single coil extra work worth the work of the digital ignition system? and.... Do you feel lucky, kid?

 

[Bert Jan]

After all this is said and done, you have to ask yourself two questions...Is all this single coil extra work worth the work of the digital ignition system? and.... Do you feel lucky, kid?

Yes it is. If it wasn't i would not have opened this topic. I want to experiment, just as i did with modifing a cb550 to run without battery. If we don't experiment, we're just monkeys.

Feed em banana's...