Forest

The Trisil seems to be the Shizzle my Nizzle. ;]    Foshizzle.

Mags

I have been experimenting with the av plug cap charging.

Im using a SIDAC to discharge the cap into a standard ignition coil primary. Im doing the vid in a bit. It might take time for it to load.

Im pretty happy with the results.   The primary of the coil is 1.25 ohms. The SIDAC is dumping 250v from a .33uf 275v cap.  It is producing a very good spark.

To run one of these coils normally with a 1ohm ballast resistor and points at 12v, the coil can consume 6 to 10 amps, with voltages above 14 when running.  All well above 50w

Here we are using max, 60ma 12v,  750mw using the av plug and a small neon transformer circuit.

I wonder how much power they use in todays ignitions..

Mags

http://www.youtube.com/watch?v=9EP8M4YcGio

Mags

Wow!

Great result Mags!

Yeah,it's time to connect it also to the bigger ground,bigger metal,something having a lot more free electrons.Maybe just grounding a case is enough ?

I forgot to mention That effeciency of av plug can be also raised by adding selfinductanc serialy connected with capacitor.

Well ...I do not write something, what I do not testing before, only fact.
But what you can find very interesting, is that conencting negative  part of primary to condenser. like in attached picture(only simle scheme do not look at value, first two coil are on same core, and better is trifilar where you can take negative point from one free secondary. The third coil is just selfinductance):
It doubles the av plug output for constant(same) time, for same input power.

I understand, for that reason is better to use transformer with 3 windings like I am wrote, and use negative point from free secondary. I was make my transformer by my self, and other part like mosfet is highly overlarge with breakdown parametrs. But with you device, is realy not good idea to connect it by this way.
I am also using lower voltage than you. If you care about larger spark, then is good to use high voltage and smal value caps, and charged it to higger possible value. But if you care about taking back some power back to source. Or just when you want handle with it, then is better to use smaller voltage.
Benefits are for example: for lower voltage you can use much faster diodes(25ns) which also increase efectivity of avr. plug
Or you can discharge it to other coil, or somwhere else, by tranzistors or mosfets which is also better and more efective than using sidac, trisil, transil or sparkgap, because when you are using solidstate part you can easy control break time and thus thath break wave at peak. Even more, you can discharge capacitor by let say, 5* times before are empty, and thus that you can have 5 break at peak. And I can also make exact measurement of input/output power
(and of course when you have let say mosfet rated 1500v, then you can have more than 1000v tension spikes on primary, and thus that with transformer just with letsay rate 1:5 ..you can have 5kv on the output, and input power will stay at letsay 0,1A from 12v battery,...if you care about biggest possible voltage, just use ingnition coil and mosfet rated at least 800v, and you will have let say 1-1,3 cm long arch on the output, just with 1,2w input) I write this, because maybe I am just misunderstood this:
"To run one of these coils normally with a 1ohm ballast resistor and points at 12v, the coil can consume 6 to 10 amps
, with voltages above 14 when running.  All well above 50w"
You mean with DC current without any interrupt?