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Old 05-23-2017, 09:02 AM   #1
AlfinVA
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Default Need a New Coil

My A's coil failed over the weekend. I need a bit of education on what and where to buy. Does any supplier provide a better coil than the others? Is there a coil that is more reliable than the others? Is a hotter coil better? What are the pros and cons of a hotter coil? Appreciate your recommendations on what and where to buy. Thanks.
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Old 05-23-2017, 10:01 AM   #2
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Default Re: Need a New Coil

Based on information from knowledgeable people on this forum, I purchased a Pertronix 40111 1.5 ohm "Flame Thrower" coil several years ago. Very happy with it.
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Old 05-23-2017, 10:27 AM   #3
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Default Re: Need a New Coil

I've read here that many coils are oil filled. If you mount them in the stock location, upside down, they can eventually leak.

I went to buy a 6v coil at the local o'reillys and when I shook it you could hear the oil sloshing around.

I think the original coils were tar filled or something similar.

I see the Pertonix 40111 mentioned above is epoxy filled....nothing to leak out....maybe I'll get one too...
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Old 05-23-2017, 10:32 AM   #4
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Default Re: Need a New Coil

Tar or Epoxy filled is best when mounted upside down like original.
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Old 05-23-2017, 11:44 AM   #5
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Default Re: Need a New Coil

There is an oil filled version, with a similar number, considerably less expensive.

This is the epoxy filled version...

https://www.summitracing.com/parts/p...Fcdefgod8HoIGw
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Last edited by 1955cj5; 05-23-2017 at 01:46 PM. Reason: Accuracy
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Old 05-23-2017, 01:40 PM   #6
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Default Re: Need a New Coil

The oil filled is 40011 the epoxy is 40111.

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Old 05-23-2017, 01:45 PM   #7
1955cj5
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Default Re: Need a New Coil

Quote:
Originally Posted by Bob C View Post
The oil filled is 40011 the epoxy is 40111.

Bob
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Old 05-23-2017, 07:24 PM   #8
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Default Re: Need a New Coil

Speaking of coils I picked up a slant pole coil that would be appropriate for my early 29 tudor. After cleaning I noticed the lightening like trace on the Bakelite insulator (see pic). Should I give it a try anyway, or would I be asking for trouble?
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Old 05-23-2017, 07:37 PM   #9
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Default Re: Need a New Coil

I'd fill the crack with super glue and give it a try.

Be sure the first thing to go on each post is an insulating washer.
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Old 05-23-2017, 08:17 PM   #10
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Default Re: Need a New Coil

Quote:
Originally Posted by AlfinVA View Post
My A's coil failed over the weekend. .
How did you determine that it was the coil that failed?
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Old 05-23-2017, 08:36 PM   #11
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Default Re: Need a New Coil

Quote:
Originally Posted by jthomas6 View Post
Based on information from knowledgeable people on this forum, I purchased a Pertronix 40111 1.5 ohm "Flame Thrower" coil several years ago. Very happy with it.
Can that coil be used on with 6 volt original points style ignition or only on the Pertronics unit?

They say their oil filled coil is available in both 1.5 ohm and 3.0 ohm versions, with either oil-filled coil.

What is the difference in the vibration resistant epoxy version regarding it's ohm's rating ?? And is any of this necessary in a Model A ?
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Old 05-23-2017, 10:02 PM   #12
barkleydave
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Default Re: Need a New Coil

Been using Flame Thrower coils on a heavy boat for years. Very robust!
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Old 05-24-2017, 02:45 AM   #13
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Default Re: Need a New Coil

Quote:
Originally Posted by pgerhardt View Post
Speaking of coils I picked up a slant pole coil that would be appropriate for my early 29 tudor. After cleaning I noticed the lightening like trace on the Bakelite insulator (see pic). Should I give it a try anyway, or would I be asking for trouble?

I don't know if your one is OK Paul,
But a fellow drove to my house a couple weeks ago in his Canadian 29 Tudor,

It still had the Original Slant Pole coil on it and it was still working fine .

I thought a tribute to Henry and his Well Built Car
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Old 05-24-2017, 05:50 AM   #14
Patrick L.
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Default Re: Need a New Coil

Quote:
Originally Posted by AlfinVA View Post
My A's coil failed over the weekend. I need a bit of education on what and where to buy. Does any supplier provide a better coil than the others? Is there a coil that is more reliable than the others? Is a hotter coil better? What are the pros and cons of a hotter coil? Appreciate your recommendations on what and where to buy. Thanks.



You didn't mention whether your car is 6 or 12 volts.

The pertronix 40111 is a 1.5 ohm epoxy coil. so,
6v; no resistor
12v; resistor needed

Just make coil is installed same as battery polarity.
battery + grd; + coil to points
battery - grd; - coil to points
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Old 05-24-2017, 08:39 AM   #15
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Default Re: Need a New Coil

Quote:
Originally Posted by Mikeinnj View Post
Can that coil be used on with 6 volt original points style ignition or only on the Pertronics unit?

They say their oil filled coil is available in both 1.5 ohm and 3.0 ohm versions, with either oil-filled coil.

What is the difference in the vibration resistant epoxy version regarding it's ohm's rating ?? And is any of this necessary in a Model A ?
Yes, mine is 6 volt, positive ground, original points style ignition. Quoting from Patrick L who just posted:
"The pertronix 40111 is a 1.5 ohm epoxy coil. so,
6v; no resistor
12v; resistor needed"
Joe
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Old 05-24-2017, 12:01 PM   #16
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Default Re: Need a New Coil

Quote:
Originally Posted by Tom Wesenberg View Post
I'd fill the crack with super glue and give it a try.

Be sure the first thing to go on each post is an insulating washer.
agreed, I have a coil with 1000 rust pit holes in it and Ive seen one way worse where the outer case had a good 1/4 of the top half rusted away still tests great and produces a nice hot blue spark on the coil tester.
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Old 05-25-2017, 10:29 PM   #17
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Default Re: Need a New Coil

If you are using a 6 volt system then a 6 or 12 volt coil will do , no resister required . But if using a 12 volt system then a resister is required.
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Old 05-25-2017, 11:23 PM   #18
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Default Re: Need a New Coil

Quote:
Originally Posted by Ronald View Post
If you are using a 6 volt system then a 6 or 12 volt coil will do , no resister required . But if using a 12 volt system then a resister is required.
If you have 12v, use the Pertronix 40611 3 ohm coil. No resistor needed as it has an internal resistor. It is epoxy filled.
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Old 05-26-2017, 12:30 AM   #19
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Default Re: Need a New Coil

Quote:
Originally Posted by Tom Wesenberg View Post
I'd fill the crack with super glue and give it a try.

Be sure the first thing to go on each post is an insulating washer.
I would go one step further and clean out the crack as it may contain material that will still allow the spark to follow the path.
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Old 05-26-2017, 12:49 AM   #20
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Default Re: Need a New Coil

Prior owner of that coil may have had a problem with it...just be aware it may fail at some point due to that crack.
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