Replacement Ignition Coil

I agree with Bob-A, but be sure to order the epoxy filled coil.

Epoxy 1.5 ohm black coil = PN 40111
Epoxy 3.0 ohm black coil = PN 40611
 
6V System
High-voltage output numbers are inconsistent on this forum. I seek the best 6V replacement coil which has the highest output voltage (highest turns ratio).

12V System
40611 Pertronix coils made in China have been recalled because they fail under load. There is another 40611 made in Mexico. There is also a report that some boxes have the wrong part number. What you actually get in the box is a mystery.

I bought a Bosch 00012 and it runs really well.
 
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I'm with Bob-A and AL in NY . I use the epoxy filled 3 ohm black coil= PN 40611 on my 12 volt roadster . These coils need no resister . Like Bob-A says you'll be glad you did . I get instant starts and improved power that you can feel . Better spark burns the gas better and gets more power from it. The first thing i did after installation was idel down the carbs.The engine ran so much better , it actually picked up quite a few RPMs .The coil is a 40.000 volt performance part but looks like any normal replacement coil . They even have a chrome version if you would like .
 
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Sorry Bob Bidonde, That hasn't been my experience With the Flame thrower coil .Do you actually have any experience at all with the 40611 coil . It wouldn't matter to me where it was made if it is good . Mine have all been made in Mexico . The 40611 coil that I installed on my roadster has performed flawlessly for the past 12 years . If you can't use it don't try it .
 
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I use an oil filled 1.5 Ω Pertronix Coil in my 6v Town Sedan. I do mount the coil with the high voltage terminal pointing up.
 
Hi Purdy! Yes, I have a 40611 Flame Thrower, but it failed so I replaced it with a Bosch 00012 (Blue Coil).
 

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A lot of "thanks for the heads up" on the v8 forum but not much in the voltage (6v) or the output. Is it 40,000 or what? I would like to know if they are reliable, is the voltage for our 6v cars, and is the output 40,000 or so? Where do you buy them? I am guessing that the 1.5 ohm is for our 6v systems.
 
Bob: we use Bosch like yours though turned terminals up as in post 8 for oil filled. We have an older tar filled (or whatever medium) 3ohm Bosch (German made) that works well also. The newer ones are supposedly made in Brazil. The oil filled coil we tried gets hot to the touch.
 
Some have claimed that the epoxy filled flame thrower coils get too hot to touch . I have had no such problem with mine . I could use either the epoxy or oil filled version as long as they are mounted correctly. A high voltage performance coil will no doubt get warmer than a low voltage coil but not that hot . The epoxy version was recommended so I use it . No problems in 12 years .I can grab and hold mine with no discomfort . If others are having problems with the flamethrewer coil , there is no telling what their problem may be . A lot of people use them with results the same as mine .
 
Our 12 volt new oil filled gets quite hot but not so much that one can't grasp it. It is cooler than the distributor housing on a warmed engine for reference. The STD UCT coils are made in China. We have also a new UCT15 with internal resistor that measures 4.4 ohms across the primary and 8100 at the secondary.
 
Smog Tech,
Where'd you get the OHM symbol in your post?----Or is it a COIL BRACKET?
The Dog:cool: & I can't find one on our CHEAP Keyboard:confused:
Bill W. & Buster T.:cool:
 
Bob Bidonde said:
The replacement ignition coil sold by Model A parts suppliers is a Standard Motor Products UC14T.
http://ecatalog.smpcorp.com/STD/#/vehicles/parts/num/UC14T?type=s
Does anyone have the output voltage spec for this coil?
Click to expand...

Answer: It depends!......Depends on how much voltage is needed to jump the plug gap. If only 5,000 volts will fire the plug, that is all the coil will put out. Even if you have a double super whammy "40,000 volt" coil it will still only build up secondary voltage to the point where the spark is strong enough to jump the plug gap, which will never reach 40,000 volts on a Model A, or any stock engine (unless you have totally burned out plug electrodes or open wires, etc.). An ultra high compression or supercharged engine running at wide open throttle may need this much voltage capability, though.
To test coil output, try a "Lisle #20700 Spark Tester". Or, go to a shop with a scope, hook it up and pull a plug wire off and watch the screen.
 
I'm not sure if my original coil is reliable, as I'm still testing it. It's only been in use for 90 years.
 

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