My s1r9a9m9 replication!

[rfsimoes]

Once again thank you for you patience
Why ? What are coil results ?
I couldn't start my engine on gasoline with that
Please check my post about that just a few posts earlier on this page.

increase number of diodes until see spark on the tip of spark plug
I don't know what is my coil output voltage but I've read that 40000V is normal.
Yes it is 40000Kv, but 3000 to 6000V is enough to generate spark at the tip
Right, got it. But then there is still voltage and some low current going back to bridge and power supply!
Not a problem?

There is no cheapest diode arrangement, Diodes get very hot NOT SUITABLE FOR LONGER  TEST TIMES, Don't go for diodes, coil solves all problems
I did like the coil arrangement but didn't like the result...


@xbox hacker

I think all of us wish the best of luck. We need another video of proof of concept so I think I speak for all of us...
We all want that engine to fart and start. GOOD LUCK

[xbox hacker]

Once again thank you for you patience
Why ? What are coil results ?
I couldn't start my engine on gasoline with that
Please check my post about that just a few posts earlier on this page.

increase number of diodes until see spark on the tip of spark plug
I don't know what is my coil output voltage but I've read that 40000V is normal.
Yes it is 40000Kv, but 3000 to 6000V is enough to generate spark at the tip
Right, got it. But then there is still voltage and some low current going back to bridge and power supply!
Not a problem?

There is no cheapest diode arrangement, Diodes get very hot NOT SUITABLE FOR LONGER  TEST TIMES, Don't go for diodes, coil solves all problems
I did like the coil arrangement but didn't like the result...

Might i suggest something.....

I did all my vidoes on a bench with a automotive coil... now i am goin to test on my engine witch is a magneto(much less power) When i first hooked it up the magneto, it didnt work!!! AT ALL!!! But i made the spark gap smaller on the HV side and now it works fine! I would suggest to ANYONE to use a spark air gap tester like this for you HV side spark gap switch...

So you can "dial-in" the right conditions to get it to work. If you watch my vids, you will see the tool on the left hand side.

Also i can now confirm that HV spark polarity is NOT important with Cap70's coil setup!!! It works with my magneto. The diode setup would not allow me to have the plug body grounded to the engine with the magneto, the spark would not work at all. With the coil setup it now works 100%!!

Also the HV caps are VERY important!!! I would suggest 500pF and 6kV (or more)!!! I had a hard time gettting my coil to work too because of the caps!!

[vrand]

Might i suggest something.....

I did all my vidoes on a bench with a automotive coil... now i am goin to test on my engine witch is a magneto(much less power) When i first hooked it up the magneto, it didnt work!!! AT ALL!!! But i made the spark gap smaller on the HV side and now it works fine! I would suggest to ANYONE to use a spark air gap tester like this for you HV side spark gap switch...

So you can "dial-in" the right conditions to get it to work. If you watch my vids, you will see the tool on the left hand side.

Also i can now confirm that HV spark polarity is NOT important with Cap70's coil setup!!! It works with my magneto. The diode setup would not allow me to have the plug body grounded to the engine with the magneto, the spark would not work at all. With the coil setup it now works 100%!!

Also the HV caps are VERY important!!! I would suggest 500pF and 6kV (or more)!!! I had a hard time gettting my coil to work too because of the caps!!

Hi,

Nice videos of Cap70's latest design.

Here are some spark plug testers online:
http://www.toolfetch.com/Category--Automotive--Spark_Testers-cat.shtml

Regards,
Michael Randall

[vrand]

@rfsimoes:
I too started with the diode setup and got great results, but my diodes got so hot that the solder melted and the diodes fell apart! The same thing happened to Cap70.

@everyone:
I will be testing Cap70's coil setup in a B&S 14hp engine tonight!!! PLEASE cross your fingers for me 

Hi xbox,

Good luck with your testing on the B&S engine!  Looking forward to your video of the testing.

WIll the timing have to be changed to 30-40 deg. After TDS?

Regards,
Michael Randall

[capacitor70]

You talk about 1100pf and 6000v. So i can use 3x 3.3nf@2000v in serie ?
Also can you explain me/us more about your core ? what size, what material ? The green wire, is it just a simple insulated wire we can find anywhere or something else ?

What do you think about the 330?f capacitor (I use 470) ? Will it survive on a long time engine run at high RPM ?

Any size and shape of ferrite core works....iron core also works but not efficient....

Yesterday I made coil with simple insulated wires, primary with 8 Turns (green wire low current wire) and secondary 24 Turns (10Amps capacity) on ferrite rod.
It works nice, but you need more capacitors use 5 capacitors of 2000V ratings, so that voltage will not drop across capacitor, and use 500pf capacitors (5 capacitors of approx 4200pf in series) Don't go for single high voltage capacitor, use of multiple capacitors perfectly blocks HV.

If you use high value of capacitor all HV gets dropped across capacitor and no spark at primary side, no spark on secondary.
If you see spark on primary side and no spark on secondary, It means you need more number of turns for secondary or higher insulation resistance of wire.

for LV side 470uF capacitor works nice. We are at the stage of engine starting, not much RPM  ....