Author Topic: Ignition module  (Read 5239 times)

Offline Tonyr

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Ignition module
« on: November 04, 2020, 03:10:42 PM »
Hello,
A couple of months ago on Vixens, seal engine post I mentioned I was planning to use the rcexl ignition on my Austin engine. Roger B posted regarding the advance curve in the rcexl ignition.
The curve says the is maximum advance 24 degrees below 400 rpm.
I wasn’t aware of this and thought it could lead to problems.
I was idly looking on the Internet and came across this module on eBay.
See photo, my Chinese isn’t very good.
I emailed the guy and he was very helpful and quick to get back to me.
He said that there is no advance curve in the ignition.
I thought I would give it a try.
It came in less than 2 weeks.
I have rigged it up to a battery in it seems work ok.
At £21 for the complete system or £18 without the hall transistor and power plug, it is worth a look.
Tony

Offline Vixen

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Re: Ignition module
« Reply #1 on: November 04, 2020, 04:10:10 PM »
Hello Tony

Can you please give a link or the full description for the ignition module. As you say, it looks interesting.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Vixen

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Re: Ignition module
« Reply #2 on: November 04, 2020, 04:23:56 PM »
Hello Tony

The photo image is not too clear on my PC. Does the label say 15KV at 6 volts and 20 kv at 10 volts?
That would be useful as it's always a good idea to keep the HT as low as possible to prevent arc over and other problems.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Tonyr

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Re: Ignition module
« Reply #3 on: November 04, 2020, 05:05:57 PM »
Hello Mike,

Yes it says, In 6 to 10 volts.
Out 15KV to 20 KV
I don’t know if that is relative to the input, I suppose it depends on cylinder pressure and spark gap.
The eBay description is 6 - 10 volt CDI igniter coil.
There is very little info regarding its operation.
I have had it making a spark across a spark plug.
The guy replied to my emails quickly, maybe ask.
I can post a different picture if it helps, I reduced it  size to keep the Size down.

Tony

Offline Vixen

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Re: Ignition module
« Reply #4 on: November 04, 2020, 06:13:39 PM »
Hello Tony

Thanks, I found it on e-bay along, with lots more interesting engines and things.

On the side of the ignition module it also say 0-12,000 r/min which would be a rev limit of 3,000 RPM for a four cylinder engine. That may (or may not) be 6,000 RPM on a four stroke engine.
Will that be enough for your little Austin engine?

Mike
« Last Edit: November 04, 2020, 06:17:35 PM by Vixen »
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Jasonb

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Re: Ignition module
« Reply #5 on: November 04, 2020, 06:36:22 PM »
It's the same one they use on the ready to run engines including 4 cylinder ones so should be OK. Don't think an A7 is particlarly high reving

https://www.enginediy.com/collections/engine-model/products/32cc-inline-four-cylinder-water-cooled-gasoline-engine-for-1-5-rc-model-car-ship-blue

Offline Tonyr

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Re: Ignition module
« Reply #6 on: November 04, 2020, 06:51:54 PM »
Mike, Jason.

I am sure 6000 rpm is more than enough.
I will be happy if it revs at all !!

Tony

Offline Tonyr

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Re: Ignition module
« Reply #7 on: November 04, 2020, 07:02:27 PM »
Just looking at the video of the engine, it looks to be running on 3 AA batteries, 4.5 volts.
Tony

Offline Tonyr

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Re: Ignition module
« Reply #8 on: November 08, 2020, 01:40:22 PM »
Hello,

Along with the ignition module I recently purchased this CDI testing tool, which I have just tested.
I got it online from a company called Hobby king.
You can plug it into the ignition and alter the rate of firing.
You can also plug the hall transistor into it to set the ignition timing.
It comes with a protractor to measure the degrees.
I tried it on the new module I have and the rcexl.
They both worked fine but the rcexl seemed to have a brighter more powerful spark.

Tony

Offline Vixen

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Re: Ignition module
« Reply #9 on: November 08, 2020, 01:49:26 PM »
Has anyone found a source of those neat plug caps shown on the 32 cc engine posted by JasonB?

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Bluechip

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Re: Ignition module
« Reply #10 on: November 08, 2020, 02:11:11 PM »
Mike

There are all sorts of squidgy right angle insulators for 6.3mm 'Push Ons'   etc.  :headscratch:

Like this :

https://cpc.farnell.com/takbro/a012/pvc-cover-6-3mm-90deg/dp/CN04726?st=right%20angle%20crimp%20connectors

Plus other sorts ...

Dave

Offline Vixen

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Re: Ignition module
« Reply #11 on: November 08, 2020, 02:47:15 PM »
Thanks Dave,

It's a reliable clip to connect to the spark plug terminal that I was looking for, rather than just a 90* cover. RCexel offer some, but there must be others, like the ones for that 32 cc engine.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Jasonb

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Re: Ignition module
« Reply #12 on: November 08, 2020, 04:09:09 PM »
S/S ones are nice and neat, I have a couple of them for 1/4 x 32 plugs.

http://cncengines.com/ic.html

Offline Charles Lamont

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Re: Ignition module
« Reply #13 on: November 08, 2020, 08:22:41 PM »
I have made my own plug caps with a bronze clip inside a 2-piece delrin outer, following the clever design by Graham Meek:
https://modelengineeringwebsite.com/Miniature_spark_plugs_2.html

Offline Vixen

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Re: Ignition module
« Reply #14 on: November 08, 2020, 10:29:25 PM »
Hello Charles,

Thank you for the link to Graham Meek's spark plug design. Although I was looking for an off-the-shelf commercial plug cap, I think I could incorporate one of Graham's tubular bronze clips inside the polyurethane boots I made specially for the 1/4 scale Bristol Mercury. I would size the bronze clips to fit these imported Chinese spark plugs.






I also used the Graham Meek 'fish spine' spark plug design for my 1/3 scale Bristol Jupiter.







Thanks again.

Stay safe

Mike
« Last Edit: November 08, 2020, 10:38:42 PM by Vixen »
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Doc

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Re: Ignition module
« Reply #15 on: November 11, 2020, 05:00:46 AM »
I made plugwire caps (boots) or ends insulators for my plug wires on the Little Demon V-8 engines I built also distributor ends also.
<a href="https://www.youtube.com/watch?v=xxIhzgEeL5o" target="_blank">http://www.youtube.com/watch?v=xxIhzgEeL5o</a>

Offline Vixen

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Re: Ignition module
« Reply #16 on: February 16, 2022, 01:39:37 PM »
Here is another simple idea for making spark plug caps.

Many of the Chinese 40 TPI spark plugs, we all use, have a 4mm terminal. For these spark plugs, we can use a female 4mm bullet connector and some heat shrink tubing. I soldered the plug lead wire to the outside of the bullet connector and crimped the tabs over.




I used standard 5mm heat-shrink tubing. A short piece over the crimp joint and a second, longer piece to partially cover the spark plug insulator at one end and to form a bend relief at the cable end. The bullet connectors are made from hard (and springy) brass which does not like to be bent through 90*. So the bullet connectors must be used as straight plug caps. A permanent bend can be formed in the heat-shrink bend relief if it is formed before the heat-shrink has cooled.





Here is one I did earlier, fitted to my Westbury Seal.







Neat and inexpensive and they seem to grip the spark plug well. Of course, you can always tighten the grip with a pair of pliers

Cheers

Mike


It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Admiral_dk

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Re: Ignition module
« Reply #17 on: February 16, 2022, 06:46:25 PM »
Great idea Mike  :praise2:  and an easy one for me, if I ever need one, as I got plenty Bullet Connectors in stock for the older of my bikes  :D

They really look the part on your engine too  :ThumbsUp:     :cheers:

Per

Offline gadabout

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Re: Ignition module
« Reply #18 on: February 16, 2022, 08:32:09 PM »
Mike,
Nice! But hey the Seal seems to have progressed considerably since the last build update! Or have I missed something?
Has it been run yet?
Regards
Mark

Offline Vixen

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Re: Ignition module
« Reply #19 on: February 16, 2022, 10:22:55 PM »
Hello Mark,

The Seal has been 'on hold' for most of the last year. The engine, clutch and two speed/ reverse gearbox were being built specifically to power the 1/6 scale Universal Carrier model. Unfortunately when the UC model kit was released, it had far too many technical issues, so I cancelled the order and lost motivation to complete the Seal. The UC problems included tracks which did not fit the drive sprockets, A poor design of differential which made steering difficult and several other issues. Clearly a rush job to get something onto the market.

I'll get back to the Seal one day

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline gadabout

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Re: Ignition module
« Reply #20 on: February 17, 2022, 12:22:30 AM »
Mike,
Please do! I want to see it finished as it will be without doubt the finest Seal ever built!!!
Regards
Mark

Offline Zephyrin

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Re: Ignition module
« Reply #21 on: February 17, 2022, 09:50:26 AM »
Quote
clutch and two speed/ reverse gearbox were being built

clutch and gear box for the seal !
could we have a look at this marvel someday ?

 

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