Posted by Texasmark1 on February 29, 2012 at 15:34:45 from (67.142.175.21):
In Reply to: Re: Modern spark plugs posted by AG in IN on February 29, 2012 at 09:04:02:
Not so on your remarks in your first paragraph where I quit reading.
One slight example, how long did it take Detroit to remove the points from auto ignitions and put in a solid state switch; ala Capacitor Discharge Ignition? Probably about 10-15 years after you and I could go to JC Whitney and get one for our cars. The list just goes on.
I have installed SS ignitions with the HV coils in some old gasser tractors and every one of them had a significant improvement in functionality, especially with smooth firing of the plugs and ignition problems associated with points getting a glaze on them while sitting up in the barn for 6 months kind of thing. I installed them in my stuff and did so for some neighbors, before I saw the light and just ran with diesel.
On the resistor in spark plugs, as mentioned, they had them back in the 50's because ignitions interfered with radio's. Now that there are microchip ignition systems, they are necessary to keep the plug firings from interfering with the generation of the spark. I just got off the phone, not 30 minutes ago with a Tech Service guy working for NGK with a question about my OB engine. He asked me some question, no if and or butts, no stuttering, told me that my problem was that my spark plug didn't have a Z in the part number which is a coil (inductor) in the plug to keep the firing of the plug from confusing the ignition system. Being the plug fires at 40,000 volts, and the igintion system has 3v micro chips in it, it stands to reason. Besides, I made my (comfortable) living for about 45 years in that arena (high voltage discharge and small signal circuits to control it) and he was right on.
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