Author Topic: Ignition module  (Read 5237 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

Online 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

Online 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

 

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