Ignition coil

1. Forgot to mention that when I called the Petronix technician years ago, I told them I had a 4 cylinder Model A engine with a higher compression vintage Model A Police head, a higher lift Stipe 330 cam, a standard "original"distributor, with "original" type solid metal spark plug connectors.

2. After the Petronix technician explained lots of things, I just bought what he recommended; i.e.,

The Petronix no. 40111, 40,000 volts, 1.5 Ohms, which Petronix recommends for (8) cylinder engines and (4) & (6) cylinder racing engines.

3. Petronix also had at that time a Flame Thrower coil with 40,000 volts, with ("3") Ohms which Petronix recommended for non-racing (4) & (6) cylinder engines.

4. Petronix advertised at that time that with increased Flamethrower spark, one can use larger spark plug gaps for better gas mileage, added power, and smoother response.

5. I use Oreilly's 3X plugs with 0.035 plug gap for "instant" starting with no problems, and plugs and combustion chambers stay clean.
 
FWIW:

A few years ago, now and then, I followed most of the health warnings & political warnings given by most.

Lately I've noticed a change in what I think about what others think ...... we begin to see our hours, minutes and seconds appear to be getting limited .......... like many other seniors on this Model A Forum ...... I have been leaning towards admiring Clark Gables last remarks in the movie, "Gone With the Wind.", beginning with, "Frankly, my Dear, .................... " LOL
 
H. L. Chauvin said:
FWIW:

A few years ago, now and then, I followed most of the health warnings & political warnings given by most.

Lately I've noticed a change in what I think about what others think ...... we begin to see our hours, minutes and seconds appear to be getting limited .......... like many other seniors on this Model A Forum ...... I have been leaning towards admiring Clark Gables last remarks in the movie, "Gone With the Wind.", beginning with, "Frankly, my Dear, .................... " LOL
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From what I infer from your posts, you installed the 40111 coil. Maybe I'm wrong about that. But, that coil is epoxy.
 
hey synchro909,
lots of good info in this to digest,eh !
if you ever need such info and more , again, imo contact jim lindner aka 'Bubba' a member. he is the guru of this equipment and info.....no guessing with him !!
 
I have taken apart, several 12 volt coils. No resistor, but finer primary windings. Could the heat problem be that a 4 cylinder engine may have longer dwell, thus more coil temperature with a 1.5 ohm.
 
Jerry in Shasta said:
I have taken apart, several 12 volt coils. No resistor, but finer primary windings. Could the heat problem be that a 4 cylinder engine may have longer dwell, thus more coil temperature with a 1.5 ohm.
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12v does not need as large of a wire as 6v because it has ~1/2 the amperage.
 
Mr. Patrick L. raised a very good point in his reply no. 45 ........ because if one looks for a Petronix 40111 coil, quite a few companies on line offer "only" the epoxy filled coils.

This can become very confusing for anyone.

1. When I ordered my Petronix 40111 coil, the Petronix Technician said he was sending his recommended heat resistant, 40111 "oil" filled coil .... but I later thought he sent the "epoxy" filled coil.

2. What can also get confusing is, if one goes to a few sites like O'Reilly's for a 40111 on the internet, they advertise "both" the 40111 "oil" filled coil & the "epoxy" filled 40111 coils, with the same description that is written on my 40111 coil's original box as follows:
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DETAILED DESCRIPTION
While it's the perfect coil to go with the PerTronix Ignitor breakerless ignition, our 40,000 volt Flame-Thrower canister coil can benefit virtually any distributor type inductive system. Its higher voltage allows larger spark plug gaps for added power, smoother response and better fuel economy. These coils are internally resisted so installation and wiring is drastically simplified. Our oil filled coils offer great heat control for street driven vehicles, while our epoxy filled coils provide superior winding support for high vibration environments in off-road vehicles and boats.
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3. Difference in Appearance: If one goes to the E-Bay site, one can see photos of the difference between the 40111 "oiled" filled & "epoxy" filled coils ..... e.g., the threaded nuts on the "epoxy" filled coils are maybe 9/16" from the coil cylinder, whereas the the threaded nuts on the "oil" filled coils are closer & only maybe 5/16" from the coil cylinder.

4. I just went out to recheck mine, "after" I saw the photos of different coil nut heights.

5. My coil is indeed an "oiled" filled coil and is mounted with all three wires pointing down.

6. I never would have looked up or known how to tell the difference between these two 40111 coils if Mr. Patrick L. had not posted reply no. 5 .... thanks.

7. FWIW, my "oil" filled Petronix 40111 coil functions greatly & it does not leak oil ...... for an 80+ year old Model A, it is even better than viagra because unlike these constantly failing foreign made Model A coils, the Flame Thrower can definitely last for more than (4) hours.
 
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A. Just in case anybody is interested in reading about the Petronix 40,000 volt oil filled or epoxy filled coil, per Reply No. 49 above, here is the listed 40,000 volt, 2016 Petronix website as of this morning ... appears it did not change since I checked it yesterday:

http://www.pertronix.com/prod/ig/flame/coils/40000_volt.aspx

B. The coil pictured in this aforementioned Petronix website photo above is the chrome model, & because of the higher nut height, this coil has the epoxy filled core as opposed to the other offered oil filled core.

C. I bought the black model as described in the current 2016 Petronix ad indicated below.

D. This 2016 Petronix website ad has the same detailed specifications, (oil or epoxy offered), as that written on my original Petronix shipping box from a few years ago; i.e.:
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Our oil filled coils offer great heat control for street driven vehicles, while our epoxy filled coils provide superior winding support for high vibration environments in offroad vehicles and boats.

Features
40,000 volts
Available chrome plated or black for that "stock look".
For use with inductive ignition systems.
1.5 or 3.0 Ohm primary resistance values available.
-------------------------------------------------------------------------------------

Hope this helps.
 
I'm not sold on overkill.
I'm not saying any aftermarket coil is bad or a bad idea, but if my spark plugs fire with 10,000 volts, and my coil puts out 20,000 volts, what is to be gained by using a 40,000 volt coil?
 
Look at the chart on page 56 of the following link:

http://www.pertronix.com/catalogs/pdf/ptx/2012/ptx2012_coils.pdf

Notice the different part numbers and their corresponding data. The 40,000 volt Flame Thrower in 1.5 ohm models (for 6-volt Model A's) come in 3 choices:

Part no. 40001 chrome, oil-filled
Part no. 40011 black, oil-filled
Part no. 40111 black, epoxy

The 3.0 ohm models for 12 volt Model A's comes in 3 choices:

Part no. 40501 chrome, oil-filled
Part no. 40511 black, oil-filled
Part no. 40611 black, epoxy
 
Tom Wesenberg said:
I'm not sold on overkill.
I'm not saying any aftermarket coil is bad or a bad idea, but if my spark plugs fire with 10,000 volts, and my coil puts out 20,000 volts, what is to be gained by using a 40,000 volt coil?
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Like picking ice cream flavors and presidential candidates, everybody has to make their own choices. The Flame Thrower #40111 works well with my high compression head and 0.035 spark plug gaps. I get quick starts, even in cold weather, and clean plugs. Like Purdy Swoft said about that coil, "There's power I can feel in the seat of my pants."

... which is good, because at first I thought I was having an issue with my Depends. :p
 
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Tom Wesenberg said:
I'm not sold on overkill.
I'm not saying any aftermarket coil is bad or a bad idea, but if my spark plugs fire with 10,000 volts, and my coil puts out 20,000 volts, what is to be gained by using a 40,000 volt coil?
Click to expand...

Nothing in my HOP. All you can do is fire the plug under pressure. If it does that, you need no more spark.
 
Tom Wesenberg said:
I'm not sold on overkill.
I'm not saying any aftermarket coil is bad or a bad idea, but if my spark plugs fire with 10,000 volts, and my coil puts out 20,000 volts, what is to be gained by using a 40,000 volt coil?
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I agree, but, thats not the point here as I see it. The Pertronix company makes numerous different coils in 1.5, 3.0 ohm, different voltage outputs, and, different insulation or cooling materials.
The only point I'm trying to make is these coils have different part numbers. I would not like to see someone install an oil filled coil on a car pointed upside down. The Pertronix 40K volt 1.5 ohm part number 40111 is epoxy filled. The other similar coils in part numbers 40001 and 40011 are oil filled.
 
Mr. Patrick L. is 100% correct.

And what I found out on E-bay yesterday is that an Ebay picture, (especially pictures of Petronix 40,000 volt coils), are not always worth a thousand (1,000) words.

Just found a 1965-1973 Petronix 40,000 volt coil on line ...... it is advertised as "epoxy" filled, and on the photo, the coil nuts are shown "close" to the cylinder .... just like mine.

So the reason mine never leaked upside down is because it "is" epoxy filled.

As far as why I went to Petronix is, over the past 20 years, Model A Forum members reported that our new foreign made coils are failing like snowballs in Hell.

On my vintage tractor alone, I just went through three (3) foreign made coils purchased from NAPA.

But who knows, could Petronix be made with foreign parts or will soon be made with foreign parts?
 
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By mistake I got a oli filled Petronix coil from amazon, Not to let it go to waste I put it on
my Ford Tractor OMG. as perdy said seat of the pants difference this tractor never sense new started & worked so good. Just My 2 Cents!!
 
If my Petronix coil ever fails I promise I will take it apart & shall return to let everyone know if it had oil or epoxy ...... judging from what I see thus far .... this coil will outlast me .... but remember, a promise is a promise !!!!!
 
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