Quote from: Groundloop on September 17, 2008, 07:36:02 AM

To get approx. 3 ampere with the NTE517 you will need 5 in parallel also. So for each plug you will need 15 high
voltage diodes. The total will be 60 diodes of the NTE517 type. Now compare the cost;

BY255 = (37 * 4) + 1 = 149 diodes = 17 USD (worst case cost)
NTE517 = 60 diodes =  400 USD (worst case cost)

From  what I understand    it  doesn't  work very well  to  use diodes in parallel .
The voltage drops  across them are  slightly different ,  most of the  current  will  go through  the  diode  with the  lowest voltage drop . 

Unless  you  match  the  diodes VERY carefully  they will end up burning out  one at a time  until  they are all  gone


gary

@ lapperll > Well what to do with those ''existing spark connections'' on the diagram'' from what i see you get dual voltage on sparks correct me if am wrong.What is the purpase of those ''existing spark connections'' .

@Mr.Tesla,
  You do not do anything with the existing spark connections.  Groundloop explained it best in reply #1606.  Please review his reply for a very well written explanation. 

I am by no means an expert in this arena, but am willing to help in any way that I can.

LapperLL

Thanks ill look in to it

Quote from: Mr.Tesla on September 17, 2008, 10:33:50 AM
@ lapperll > Well what to do with those ''existing spark connections'' on the diagram'' from what i see you get dual voltage on sparks correct me if am wrong.What is the purpase of those ''existing spark connections'' .

Mr Tesla

This  thread  is  about  getting the most bang for the buck  from those 2  connections .
The  existing   ignition system  is high enough voltage to  form  an arc . But not much power.
The  low   voltage from the inverter  has  enough power  to do some work .

When the  high   voltage makes  an arc  within that arc  plasma is formed.
This  plasma  is  a relativly good  conductor  so  the  low  voltage  can flow through the arc.

We  are in effect making a switch  using  the  existing   ignition  system   to  turn the  power on and off .

gary