Water Sparkplug

[Jetijs]

Greg, not all spark plugs are made so that it is easy to remove the resistor in them. I destroyed a lot of spark plugs by trying to remove the resistor. So I would rather suggest you to try finding ones that already do not have any resistors in them.
Anyway, today I replaced the ITR8102 optrotrigger with a LTH301-46. It seems that everything is working fine now. I tested the generator engine and it runs ok with the custom ignition and the 2:1 reducer. Here is a video:
YouTube - Another CDI test

At this time there is no booster side attached. I just wanted to see how it runs on gasoline and standard timing (about 15 degree before TDC).

Thanks,
Jetijs

[jstadwater]

Nexus circuit test 1...................

I really should wait until my 1N5408 diodes arrive in a couple days, but couldn't resist playing! I just SMOKED a 1000 watt inverter a few minutes ago. I wired up a series string of HV microwave diodes to equal about 60KV instead of the 1N5408 ones as stated by Bill, I guess the amp rate was all wrong.......or something. As soon as I flipped on the inverter, the sparkplug took off arcing like crazy on it's own! I wasn't even triggering the coil at the time. I could only leave the inverter on for about 5 seconds at a time or it would start squeeling at me. The LAST time I turned on the inverter, I trigered the coil a few times, it did make the spark more intense when it fired. Right up to when the inverter looked like it was about to catch FIRE!!! I thought this thing was only supposed to pull 1/10th of an amp, probably would if I hooked it up right. I tried it with and w/out the MOT, w/out was a much more intense spark. Come to think of it, the MOT was NOT in the circuit when I smoked the inverter. Either way though, the spark was a continual event at the plug, with no control. The diode direction in the schematic looks backward, is that what it takes to be able to hook up one leg of the inverter to ground? I still don't understand how this works, but as long as it DOES work, who cares, right? Surely somebody has had better luck than me so far. Any Nexus circuit advise from someone with a working model? This is a lot of fun, at any rate. When I play with this circuit, should I have a regular old sparkplug wire from coil to plug? Or does it matter if I use the same heavy guage wire as with the regular CDI circuit? Gotta go, more inverters just waiting to be fried!!!!!

Mike

[CPU3rother]

Nexus circuit.

I’m assuming from the circuit, that Bill’s VW’s ignition coil produces HV-. Being the opposite of newer engines. So if this was going to be used on other engines the components polarities might need to be change. e.g. turning diodes ect. Can anyone confirm the ignition coil type he used on his VW bus?

[Jetijs]

I really should wait until my 1N5408 diodes arrive in a couple days, but couldn't resist playing! I just SMOKED a 1000 watt inverter a few minutes ago.

Mike

Welcome to the fried inverter club

[jstadwater]

Fried inverter club.......

Thanks for the welcome mat Jetijs, I now have a total of 4 inverters under my belt. One just had the red light come on and not go back off........But the other 3...........SMOKE JUST ROARED OUT!!!!!!

I am trying to research now to verify if the 76 VW used positive ground, no luck yet finding out. Later.........................................Mike

[goldenequity]

I really should wait until my 1N5408 diodes arrive in a couple days, but couldn't resist playing! I just SMOKED a 1000 watt inverter a few minutes ago. I wired up a series string of HV microwave diodes to equal about 60KV instead of the 1N5408 ones as stated by Bill, I guess the amp rate was all wrong.......or something. As soon as I flipped on the inverter, the sparkplug took off arcing like crazy on it's own! I wasn't even triggering the coil at the time. I could only leave the inverter on for about 5 seconds at a time or it would start squeeling at me. The LAST time I turned on the inverter, I trigered the coil a few times, it did make the spark more intense when it fired. Right up to when the inverter looked like it was about to catch FIRE!!! I thought this thing was only supposed to pull 1/10th of an amp, probably would if I hooked it up right. I tried it with and w/out the MOT, w/out was a much more intense spark. Come to think of it, the MOT was NOT in the circuit when I smoked the inverter. Either way though, the spark was a continual event at the plug, with no control. The diode direction in the schematic looks backward, is that what it takes to be able to hook up one leg of the inverter to ground? I still don't understand how this works, but as long as it DOES work, who cares, right? Surely somebody has had better luck than me so far. Any Nexus circuit advise from someone with a working model? This is a lot of fun, at any rate. When I play with this circuit, should I have a regular old sparkplug wire from coil to plug? Or does it matter if I use the same heavy guage wire as with the regular CDI circuit? Gotta go, more inverters just waiting to be fried!!!!!

Mike

URGENT! WATER AS FUEL DISCOVERY FOR EVERYONE TO SHARE
Mike.... this might help if you're working with the Nexus circuit... here is where Groundloop started diagraming/dialoguing about the circuit.... lots of Q&A follows after this..... perhaps you'll get your answers there as you read through.
Cheers

[jstadwater]

Thanks Goldenequity,

I will look there first thing in the morning, have to go home now, spend the rest of the evening with the wife and kids. Yall have a good evening, tomorrow's another day to play!

Mike

[insane4evr]

Hi jstadwater,

Can you sketch your connection or better yet take high res pictures of your smoked setup. Close up of diodes and capacitors might also. Maybe others can take a look and help to minimize quantity of future collection of smoked inverters.

I think that diode (string of 5 or less) connected to one of the output terminal of the inverter is important.

[gmeast]

resistor plugs

Hey Greg & Everyone,

Here's the video of user (mdbreedi) showing who to "Plasma Plug Setup" >>
YouTube - Plasma Plug Setup

Hope this helps,
ET

Hi etgone,

Thank you for the link. I'm so glad I'm not going have to figure this out on my own.

Peace,

Greg

[gmeast]

engine video

Greg, not all spark plugs are made so that it is easy to remove the resistor in them. I destroyed a lot of spark plugs by trying to remove the resistor. So I would rather suggest you to try finding ones that already do not have any resistors in them.
Anyway, today I replaced the ITR8102 optrotrigger with a LTH301-46. It seems that everything is working fine now. I tested the generator engine and it runs ok with the custom ignition and the 2:1 reducer. Here is a video:
YouTube - Another CDI test

At this time there is no booster side attached. I just wanted to see how it runs on gasoline and standard timing (about 15 degree before TDC).

Thanks,
Jetijs

Hi Jetijs,

Fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic, fantastic!

That's great. I had a diversion in the form of working on the distributor challenge that I finally solved. I want to adapt my '64 VW Bug to a CDI plasma spark. I'm now going to get back to the generator task.

That's a great demo. Thanks,

Greg

[lapperl]

Thanks for the welcome mat Jetijs, I now have a total of 4 inverters under my belt. One just had the red light come on and not go back off........But the other 3...........SMOKE JUST ROARED OUT!!!!!!

I am trying to research now to verify if the 76 VW used positive ground, no luck yet finding out. Later.........................................Mike

Not sure if it will help any, I know I had a hard time making heads or tails out of it. But here is a link for VW wiring diagrams. If I am reading it correctly, then the VW has a negative grounding system.

Maybe someone else can decipher the diagram?

Google Image Result for http://www.vintagebus.com/wiring/bus-66.jpg

LapperL

[gmeast]

wiring

Not sure if it will help any, I know I had a hard time making heads or tails out of it. But here is a link for VW wiring diagrams. If I am reading it correctly, then the VW has a negative grounding system.

Maybe someone else can decipher the diagram?

Google Image Result for http://www.vintagebus.com/wiring/bus-66.jpg

LapperL

Hi,

The key says 1 & 2 are ground straps. 1 comes from the battery and it is located on the - minus on the battery symbol. So it seems like 'Negative Ground'.

Peace,

Greg

[lapperl]

Hi,

The key says 1 & 2 are ground straps. 1 comes from the battery and it is located on the - minus on the battery symbol. So it seems like 'Negative Ground'.

Peace,

Greg

Thanks, that's what I thought.

Received my diodes today hopefully if time permits, I will have the circuit assembled for testing this weekend.


LapperL

[Ansis Freimanis]

To All

Dear, friends!
Its time to finish speak about spark plugs with, or w/a resistors and of resembling (destroying) spark plugs. Here is a link to LARGE NGK catalogue. In this catalogue all of you can find what you need- info about types of plugs, how to read numbers on the body of plugs and types of resistor and resistor less plugs. And after it you can by what you need in every automobile store. Don’t make live stupid! These plugs are cheep and very good quality. I find in Latvia a big dealer and buy what I need. And you can do it similar. Link: http://www.ngkntk.ru/index.php?id=43...ash=3cf86cbd5c

[CPU3rother]

Not sure if it will help any, I know I had a hard time making heads or tails out of it. But here is a link for VW wiring diagrams. If I am reading it correctly, then the VW has a negative grounding system.

Maybe someone else can decipher the diagram?

Google Image Result for http://www.vintagebus.com/wiring/bus-66.jpg

LapperL

According to this the 76 bus uses a negative ground.