Ignition Coil Modification?

[Ringa]

Does anyone know of a company that can modify an ignition coil i.e. to increase the voltage in certain RPM levels?

Any help would be appreciated.

Thanks

[stevieturbo]

Ringa said:

Does anyone know of a company that can modify an ignition coil i.e. to increase the voltage in certain RPM levels?

Any help would be appreciated.

Thanks

What a very strange request.

Why would you even need such a complicated device ?

[anonymous-user]

Just fit a more powerful coil, and shorten the charge time at the speeds/loads where you don't need the ignition energy. Coils are rated in terms of the Joules of energy they store (and hence release to the spark gap), this energy is largely a function of the charge current and the inductance of said coil.


Also worth remembering that the peak voltage limitation is often the maximum breakdown voltage of the coil driving transistor. if you use the same amplifier, a bigger coil may not actually deliver a greater energy if the transistor is the limiting factor in the peak flyback voltage.

[Ringa]

The coil is for a 2 stroke bike which is very limited. There is a certain RPM band where I would like to make an increase and if this requires changing the inner working then that might be a route.

It seems to be very difficult finding a suitable company that can open this and work some magic on the RPM values.

Any help is appreciated fellas.

Thanks

[anonymous-user]

Is it a "magneto" system? i.e. the coil just picks up it's power directly from the triggerwheel, or is it electronic / points etc?

Depending on the availible package space it might be possible to rewind with a larger turn count to increase a magneto's performance

[Ringa]

Thanks Max T

I think its just the magneto system as you described, any idea's who can re-wind it for me for the bigger turn?

Im learning just by reading your replies.

[anonymous-user]

Post up some pics of the coil, both installed and on it's own and i'm sure people will be able to suggest something. (including the "target" that energises it on the flywheel if poss)

[stevieturbo]

And perhaps of course what the engine/application actually is.

[blitzracing]

Going back a few years (around 1976) Kawasaki realised they had a problem with 2 stoke plugs fouling on the big 2 strokes (H2 750 triple) so they came up with an odd solution, in so much that there was a magneto type system that produced more that 12 volts (I think it was 30 - 50 volts)that was then used to fire the coil with an electronic switch. I dont recollect if the voltage was stored, or used to fire the coil directly, but it produced some phenomenal secondary voltages, that could fire even the most fouled plug, but it produced lots of radio interference in the process.