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Author Topic: Spark plugs  (Read 1129 times)

zahc

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Spark plugs
« on: August 15, 2020, 11:40:37 PM »
I need a spark plug for an undisclosed application, with a 10mm thread, as long of a reach as possible, and no resistor. That's it. However, I have found out that spark plug part numbers are meaningless, and manufacturers only catalog them by the application, like by the actual car that uses it. I can't find any way to look up spark plugs by their actual physical characteristics. Does anyone happen to know a spark plug that fits this description?
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Nick1911

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Re: Spark plugs
« Reply #1 on: August 15, 2020, 11:45:11 PM »
Oh sure, just get an NGK CR9EH-9 and call it good.

Actually, I take it back, that might be a resistor plug.  Checking.

Take a look at the NGK C7E.  No resistor, 10mm thread, 3/4 of an inch reach.
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zahc

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Re: Spark plugs
« Reply #2 on: August 16, 2020, 12:16:59 AM »
Perfect. How did you find it? Do you have a book or something?

After 19 years, I can still remember that my 1999 CR125 took a BR9EH plug...
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Nick1911

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Re: Spark plugs
« Reply #3 on: August 16, 2020, 12:39:24 AM »
No, summit racing just has a particularly good search engine for features like this.

I'll admit to a polite curiosity of what you're building though.  The specified characteristics suggest some kind of an electrical pass-through into a pressurized (or vacuum) container.
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Jim147

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Re: Spark plugs
« Reply #4 on: August 16, 2020, 01:06:53 AM »
Don't my forget about heat ranges on plugs.
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AmbulanceDriver

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Re: Spark plugs
« Reply #5 on: August 16, 2020, 02:31:29 AM »
Quote from: Nick1911 on August 16, 2020, 12:39:24 AM
No, summit racing just has a particularly good search engine for features like this.

I'll admit to a polite curiosity of what you're building though.  The specified characteristics suggest some kind of an electrical pass-through into a pressurized (or vacuum) container.

My first thought too.  Fusor?
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Fly320s

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Re: Spark plugs
« Reply #6 on: August 16, 2020, 06:55:17 AM »
10mm threaded plug?  Make sure it isn't downloaded to .40 power.   :rofl:
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K Frame

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Re: Spark plugs
« Reply #7 on: August 16, 2020, 07:54:36 AM »
"Make sure it isn't downloaded to .40 power. "

No matter what you're still going to pay extra for it... because... reasons.
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Brad Johnson

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Re: Spark plugs
« Reply #8 on: August 16, 2020, 08:34:09 AM »
NGK LMAR8C-9. Reach is just a smidge 9ver 25mm.

Brad
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AmbulanceDriver

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Re: Spark plugs
« Reply #9 on: August 16, 2020, 12:43:29 PM »
Quote from: Brad Johnson on August 16, 2020, 08:34:09 AM
NGK LMAR8C-9. Reach is just a smidge 9ver 25mm.

Brad

That's a resistor type spark plug, he needs one without a resistor.
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Fly320s

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Re: Spark plugs
« Reply #10 on: August 16, 2020, 12:47:06 PM »
Quote from: AmbulanceDriver on August 16, 2020, 12:43:29 PM
That's a resistor type spark plug, he needs one without a resistor.

So, resistance is futile?
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Brad Johnson

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Re: Spark plugs
« Reply #11 on: August 16, 2020, 02:00:03 PM »
Longest extended reach electrode I can find in non-resistor is 19mm. It's a gasketed design.

Are you dead-set on 10mm threads? You can get 25mm with other thread sizes.

Brad
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charby

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Re: Spark plugs
« Reply #12 on: August 16, 2020, 03:11:23 PM »
Acetylene cannon?
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Jim147

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Re: Spark plugs
« Reply #13 on: August 16, 2020, 06:35:08 PM »
Add the right amount of O2 for the bigger boomer
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Fly320s

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Re: Spark plugs
« Reply #14 on: August 16, 2020, 08:35:38 PM »
Quote from: Jim147 on August 16, 2020, 06:35:08 PM
Add the right amount of O2 for the bigger boomer

Or the wrong amount of ammonium nitrate for the biggest boomer.
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Fly320s

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Re: Spark plugs
« Reply #15 on: August 16, 2020, 08:37:59 PM »
Or use the Illudium PU-36 explosive space modulator for an Earth-shattering kaboom.
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zxcvbob

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Re: Spark plugs
« Reply #16 on: August 17, 2020, 01:02:50 AM »
Quote from: Jim147 on August 16, 2020, 06:35:08 PM
Add the right amount of O2 for the bigger boomer

Propane and oxygen is about as loud as acetylene and air.  I would not trust an acetylene and oxygen cannon; that might can actually go high-order.  C2H2 and O2 soap bubbles and balloons are kinda fun.
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