Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 02-09-2018, 12:37 PM   #1
Bob Bidonde
Senior Member
 
Bob Bidonde's Avatar
 
Join Date: May 2010
Location: Long Island, NY
Posts: 3,425
Default Replacement Ignition Coil

The replacement ignition coil sold by Model A parts suppliers is a Standard Motor Products UC14T.
http://ecatalog.smpcorp.com/STD/#/ve...m/UC14T?type=s
Does anyone have the output voltage spec for this coil?
__________________
Bob Bidonde

Last edited by Bob Bidonde; 02-09-2018 at 01:03 PM.
Bob Bidonde is offline   Reply With Quote
Old 02-09-2018, 02:17 PM   #2
3.6rs
Senior Member
 
3.6rs's Avatar
 
Join Date: Jul 2010
Location: Belgistan (formerly known as Belgium)
Posts: 573
Default Re: Replacement Ignition Coil

Quote:
Originally Posted by Bob Bidonde View Post
...
Does anyone have the output voltage spec for this coil?
Why would this be important ?
3.6rs is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 02-09-2018, 02:34 PM   #3
Bob-A
Senior Member
 
Bob-A's Avatar
 
Join Date: May 2010
Location: Central FL, USA
Posts: 1,135
Smile Re: Replacement Ignition Coil

Go with the Pertronix Flamethrower coil! You will be glad you did......

Bob-A
Bob-A is offline   Reply With Quote
Old 02-09-2018, 02:44 PM   #4
AL in NY
Senior Member
 
AL in NY's Avatar
 
Join Date: May 2010
Location: Southern Upstate New York
Posts: 1,147
Default Re: 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
__________________
AL in NY
AL in NY is offline   Reply With Quote
Old 02-09-2018, 03:26 PM   #5
Bob Bidonde
Senior Member
 
Bob Bidonde's Avatar
 
Join Date: May 2010
Location: Long Island, NY
Posts: 3,425
Default Re: Replacement Ignition Coil

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.
__________________
Bob Bidonde

Last edited by Bob Bidonde; 02-09-2018 at 03:51 PM.
Bob Bidonde is offline   Reply With Quote
Old 02-09-2018, 03:46 PM   #6
Purdy Swoft
Senior Member
 
Purdy Swoft's Avatar
 
Join Date: May 2010
Location: Alabama
Posts: 8,099
Default Re: Replacement Ignition Coil

Sponsored Links (Register now to hide all advertisements)
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 .

Last edited by Purdy Swoft; 02-09-2018 at 03:53 PM.
Purdy Swoft is offline   Reply With Quote
Old 02-09-2018, 04:11 PM   #7
Purdy Swoft
Senior Member
 
Purdy Swoft's Avatar
 
Join Date: May 2010
Location: Alabama
Posts: 8,099
Default Re: Replacement Ignition Coil

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 .

Last edited by Purdy Swoft; 02-09-2018 at 04:19 PM. Reason: added the name Bidonde .
Purdy Swoft is offline   Reply With Quote
Old 02-09-2018, 11:36 PM   #8
Smog Tech
Senior Member
 
Smog Tech's Avatar
 
Join Date: Jan 2014
Location: Arcadia, CA
Posts: 145
Default Re: Replacement Ignition Coil

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.
Smog Tech is offline   Reply With Quote
Old 02-10-2018, 01:23 AM   #9
1930marie
Senior Member
 
1930marie's Avatar
 
Join Date: Sep 2015
Location: Oregon
Posts: 238
Default Re: Replacement Ignition Coil

Quote:
Originally Posted by Smog Tech View Post
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.
Does this coil have a stock A look and where can I buy one like you installed? Thanks!
__________________
They know enough who know to learn.
1930marie is offline   Reply With Quote
Old 02-10-2018, 09:27 AM   #10
Bob Bidonde
Senior Member
 
Bob Bidonde's Avatar
 
Join Date: May 2010
Location: Long Island, NY
Posts: 3,425
Default Re: Replacement Ignition Coil

Hi Purdy! Yes, I have a 40611 Flame Thrower, but it failed so I replaced it with a Bosch 00012 (Blue Coil).
Attached Images
File Type: jpg DSCN2394.jpg (53.4 KB, 108 views)
__________________
Bob Bidonde
Bob Bidonde is offline   Reply With Quote
Old 02-10-2018, 10:35 AM   #11
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 4,992
Default Re: Replacement Ignition Coil

Quote:
Originally Posted by Bob Bidonde View Post
The replacement ignition coil sold by Model A parts suppliers is a Standard Motor Products UC14T.
http://ecatalog.smpcorp.com/STD/#/ve...m/UC14T?type=s
Does anyone have the output voltage spec for this coil?
Contact Standard Motor Products they should have it.
__________________
If you don't hear a rumor by 10 AM, start one!.
Got my education out behind the barn!
katy is offline   Reply With Quote
Old 02-10-2018, 10:50 AM   #12
BUBBAS IGNITION
Senior Member
 
BUBBAS IGNITION's Avatar
 
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 4,148
Default Re: Replacement Ignition Coil

Quote:
Originally Posted by Bob Bidonde View Post
Hi Purdy! Yes, I have a 40611 Flame Thrower, but it failed so I replaced it with a Bosch 00012 (Blue Coil).
You guys need to read this post on the V8 forum........
www.fordbarn.com/forum/showthread.php?t=238737
__________________
If it Makes Spark, we do it !!!!
www.bubbasignition.com
[email protected]
BUBBAS IGNITION is offline   Reply With Quote
Old 02-10-2018, 11:46 AM   #13
jhowes
Senior Member
 
Join Date: Jul 2010
Location: upstate NY near Mass border
Posts: 789
Default Re: Replacement Ignition Coil

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.
jhowes is offline   Reply With Quote
Old 02-10-2018, 11:53 AM   #14
duke36
Senior Member
 
Join Date: Jun 2015
Posts: 1,414
Default Re: Replacement Ignition Coil

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.
duke36 is offline   Reply With Quote
Old 02-10-2018, 12:56 PM   #15
Purdy Swoft
Senior Member
 
Purdy Swoft's Avatar
 
Join Date: May 2010
Location: Alabama
Posts: 8,099
Default Re: Replacement Ignition Coil

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 .
Purdy Swoft is offline   Reply With Quote
Old 02-10-2018, 04:18 PM   #16
duke36
Senior Member
 
Join Date: Jun 2015
Posts: 1,414
Default Re: Replacement Ignition Coil

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.
duke36 is offline   Reply With Quote
Old 02-10-2018, 05:14 PM   #17
BILL WILLIAMSON
Senior Member
 
BILL WILLIAMSON's Avatar
 
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,560
Default Re: Replacement Ignition Coil

Smog Tech,
Where'd you get the OHM symbol in your post?----Or is it a COIL BRACKET?
The Dog & I can't find one on our CHEAP Keyboard
Bill W. & Buster T.
__________________
"THE ASSISTANT GURU OF STUFF"
BILL WILLIAMSON is offline   Reply With Quote
Old 02-10-2018, 06:56 PM   #18
Smog Tech
Senior Member
 
Smog Tech's Avatar
 
Join Date: Jan 2014
Location: Arcadia, CA
Posts: 145
Default Re: Replacement Ignition Coil

Bill,
On a MAC the Ω is option z.
Smog Tech is offline   Reply With Quote
Old 02-11-2018, 12:12 AM   #19
40 Deluxe
Senior Member
 
Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,773
Default Re: Replacement Ignition Coil

Quote:
Originally Posted by Bob Bidonde View Post
The replacement ignition coil sold by Model A parts suppliers is a Standard Motor Products UC14T.
http://ecatalog.smpcorp.com/STD/#/ve...m/UC14T?type=s
Does anyone have the output voltage spec for this coil?
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.
40 Deluxe is online now   Reply With Quote
Old 02-11-2018, 06:41 AM   #20
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
Default Re: Replacement Ignition Coil

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.
Attached Images
File Type: jpg Terminal Box and Cleaned Paint.jpg (66.9 KB, 75 views)
Tom Wesenberg is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 09:41 PM.