Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 12-13-2019, 01:25 PM   #1
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,358
Default Mallory Unilite Distributor HELP requested.

I converted my Mallory YL 2527501 dual point distributor to a Unilite using Kit # 558. It worked fine for a few years but as of late it has been giving me lots of trouble. The car runs great for about a 1/2 mile, then shuts off and dies. Will restart and then die again. This is repeated 1/2 mile at a time. I am thinking that I may have the incorrect ignition components. Fuel delivery system is fine. It's driving me nuts and costing me bucks.

Here's the specifics of what I am currently using:

Engine : Stock 1953 Ford flat head 239 cu. in. engine with a Holley 390 carb.
Car: 1940 Ford
Plug Wires:Taylor 8mm Spiro Wound spark Plug Wire for electronic ignitions
Module: Mallory 605
Surge Protector: MAA-29351
Ballast Resistor: M-700
Coil: Mallory 29216

If you are running an 8BA with a Unilite set up I sure would appreciate it if you would tell me what specific components you are using that work properly.

An internet search results in tons of various answers but, nothing conclusive. Therefore your help is requested. Thanks, JIM
Today 12/13/19 the Mallory Tech support fellow told me to use the following:
Mallory Coil #29219 (1.4 primary ohms)
Mallory Ballast resistor # 8214 ( .8 ohms)
Mallory Current guard protector # 29371 (This is a different part # than mine.)

He also said:

“The Unilite module will last longer if you run a ballast, it’s your choice on whether you want to run it or not, I can only make the suggestion. The Mallory coil has a primary resistance of 1.4 ohms of resistance. The Mallory module needs at least 2 ohms of resistance for it to function correctly. 1.4 +.8 will give you 2.2 ohms of resistance. A Mallory module needs to run at about 6 amps."

I think there are some Fordbarners who are using a Unilite with their 8BA.

All feedback is welcome. PS: Yes , I know there are some folks who say "go back to points". Thanks, JIM
19Fordy is online now   Reply With Quote
Old 12-13-2019, 01:32 PM   #2
51 MERC-CT
Senior Member
 
51 MERC-CT's Avatar
 
Join Date: May 2010
Location: Hartford, Ct
Posts: 4,640
Default Re: Mallory Unilite Distributor HELP requested.

Don't have a solution for you but for me the solution for the Mallory Unilite I have that quit was to convert it to a Pertronix setup.
__________________
DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES
51 MERC-CT is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 12-13-2019, 03:07 PM   #3
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 13,410
Default Re: Mallory Unilite Distributor HELP requested.

So what are the resistance values on your current coil and ballast resistor?
JSeery is online now   Reply With Quote
Old 12-13-2019, 03:32 PM   #4
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,358
Default Re: Mallory Unilite Distributor HELP requested.

Mr. Seery, Thanks for your assistance.

Resistance of my current Mallory 29216 coil is .7 ohms.
Resistance of current Mallory ballast resistor 700 is .75- 1.5 ohms.

The Mallory Tech said I should be using Mallory coil 29129 (1.4 ohms) and
Mallory Ballast Resistor #8214 (.8 ohms).

Thanks

Last edited by 19Fordy; 12-13-2019 at 03:40 PM.
19Fordy is online now   Reply With Quote
Old 12-13-2019, 06:27 PM   #5
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 13,410
Default Re: Mallory Unilite Distributor HELP requested.

Big current difference there, so might be a factor.
JSeery is online now   Reply With Quote
Old 12-13-2019, 06:41 PM   #6
philipswanson
Senior Member
 
Join Date: Oct 2015
Location: Bonita, CA
Posts: 1,017
Default Re: Mallory Unilite Distributor HELP requested.

Alternatively you can run a Mallory Hy Fire box which eliminates the need for any resister and supplies optimal power to the module at all times. That's what I have had in my truck for 20 years plus with no failures. It is much easier on the module according to Mallory.
philipswanson is offline   Reply With Quote
Old 12-13-2019, 06:56 PM   #7
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,358
Default Re: Mallory Unilite Distributor HELP requested.

When calculating the current using the (.7 ohm) 29216 coil and the M700 (.75 - 1.5 ohm) resistor , how do you calculate the current assuming the alternator puts out 14 volts? Do you add the .75 ohm value and the 1.5 ohm values together to get 2.25 ohms or do you use only the .75 ohm value OR only the 1.5 ohm value and add that number to the .7 ohm coil resistance? How does the math go?

When using the 1.4 ohm Mallory 29219 coil and the Mallory 8214 (.8 ohm) resistor how do you calculate the current assuming alternator puts out 14 V?

I realize these questions may seem elemental to some but, electricity is not my friend and i don't want to burn up modules. Thanks so much
19Fordy is online now   Reply With Quote
Old 12-13-2019, 10:59 PM   #8
estout81
Senior Member
 
estout81's Avatar
 
Join Date: Jun 2010
Location: Utica, Ohio
Posts: 401
Default Re: Mallory Unilite Distributor HELP requested.

Add the coil and resistor. The voltage divided by the resistance equals amps. In your case, 14 divided by 2.2 equals 6.36 amps.
estout81 is online now   Reply With Quote
Old 12-14-2019, 04:23 AM   #9
BUBBAS IGNITION
Senior Member
 
BUBBAS IGNITION's Avatar
 
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 3,859
Default Re: Mallory Unilite Distributor HELP requested.

You just need to change the coil. Pretty common as the uni lite has a current limiting protection circuit set at approx 8 amps. On a street car with the 216 coil it will bump this circuit quite a bit eventually causing damage to the circuit and it will shut down.
The 219 coil is better with the higher resistance but you never know what coil you are getting , many of the 219 coils have .7 ohm resistance ......
I would suggest using a Bosch blue coil # 00012 that has 3 ohms res and you dont need the ballast.
__________________
If it Makes Spark, we do it !!!!
www.bubbasignition.com
jimlinder@juno.com
BUBBAS IGNITION is offline   Reply With Quote
Old 12-14-2019, 10:27 AM   #10
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,358
Default Re: Mallory Unilite Distributor HELP requested.

Bubba, Would it be ok to use the Blue Beru coil with 3.3 ohm primary resistance ? No external resistor needed. Add says it replaces the Bosch 00012 coil (which is much more expensive)? Look here: Thank you.
https://www.ebay.com/itm/New-BERU-Ig...ty!33076!US!-1
19Fordy is online now   Reply With Quote
Old 12-14-2019, 10:33 AM   #11
flatjack9
Senior Member
 
flatjack9's Avatar
 
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 3,512
Default Re: Mallory Unilite Distributor HELP requested.

I have used the Beru coil with no problems.
flatjack9 is offline   Reply With Quote
Old 12-14-2019, 06:53 PM   #12
BUBBAS IGNITION
Senior Member
 
BUBBAS IGNITION's Avatar
 
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 3,859
Default Re: Mallory Unilite Distributor HELP requested.

Quote:
Originally Posted by 19Fordy View Post
Bubba, Would it be ok to use the Blue Beru coil with 3.3 ohm primary resistance ? No external resistor needed. Add says it replaces the Bosch 00012 coil (which is much more expensive)? Look here: Thank you.
https://www.ebay.com/itm/New-BERU-Ig...ty!33076!US!-1
Yes we have shipped over 100 of the Beru coils with no problems I still like the Bosch Blue as well......
__________________
If it Makes Spark, we do it !!!!
www.bubbasignition.com
jimlinder@juno.com
BUBBAS IGNITION is offline   Reply With Quote
Old 12-15-2019, 01:41 PM   #13
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,358
Default Re: Mallory Unilite Distributor HELP requested.

Bubba, Thanks for the reply. When I use the Beru 3.3 ohm coil (with no resistor) the problem still happens. I have good grounds and the mallory 605 module test shows that it's good. Car starts with a toich of the button and runs fine for about 1/2 mile, then dies.
Restarts instantly and problem is repeated. Maybe, my problem lies elsewhere.

I sure do thank all the folks who have replied to my request for help.
19Fordy is online now   Reply With Quote
Old 12-15-2019, 02:02 PM   #14
51 MERC-CT
Senior Member
 
51 MERC-CT's Avatar
 
Join Date: May 2010
Location: Hartford, Ct
Posts: 4,640
Default Re: Mallory Unilite Distributor HELP requested.

Will it do the same thing while parked and just simulating a 1/2 mile trip?
Fuel starvation?
__________________
DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

Last edited by 51 MERC-CT; 12-15-2019 at 02:08 PM.
51 MERC-CT is offline   Reply With Quote
Old 12-15-2019, 02:28 PM   #15
BUBBAS IGNITION
Senior Member
 
BUBBAS IGNITION's Avatar
 
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 3,859
Default Re: Mallory Unilite Distributor HELP requested.

Quote:
Originally Posted by 19Fordy View Post
Bubba, Thanks for the reply. When I use the Beru 3.3 ohm coil (with no resistor) the problem still happens. I have good grounds and the mallory 605 module test shows that it's good. Car starts with a toich of the button and runs fine for about 1/2 mile, then dies.
Restarts instantly and problem is repeated. Maybe, my problem lies elsewhere.

I sure do thank all the folks who have replied to my request for help.

Then the circuit in the module is hurt, being on overload for all that time . You need to replace the module.. Replace module and coil together for another few years of good driving......

https://www.summitracing.com/parts/maa-6100m
__________________
If it Makes Spark, we do it !!!!
www.bubbasignition.com
jimlinder@juno.com
BUBBAS IGNITION is offline   Reply With Quote
Old 12-15-2019, 03:16 PM   #16
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,358
Default Re: Mallory Unilite Distributor HELP requested.

51Merc-CT: It will not due the same thing when parked and running at idle at operating temperature.

Bubba: Thanks for hanging in their with me. I will do as you suggest and post results.

Again, not to be overly indulgent, I really do very much appreciate the help I have received on the Barn as constantly responding to questions can wear a person down, especially if it's a question asked over and over. I always try to put myself in the "questioners" position as i know the feeling of frustration.
19Fordy is online now   Reply With Quote
Old 12-15-2019, 04:28 PM   #17
51 MERC-CT
Senior Member
 
51 MERC-CT's Avatar
 
Join Date: May 2010
Location: Hartford, Ct
Posts: 4,640
Default Re: Mallory Unilite Distributor HELP requested.

After having problems with my Unilite I searched for others with similar problems.


Here are just a few with similar problems (interesting reading)


http://forums.mustangworks.com/f10/m...problems-8017/


https://forums.holley.com/showthread...lite-6AL-issue



https://classicbroncos.com/forums/sh...d.php?t=134646


This was enough for me to convert to a Pertonix unit.
__________________
DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES
51 MERC-CT is offline   Reply With Quote
Old 12-16-2019, 10:29 AM   #18
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,358
Default Re: Mallory Unilite Distributor HELP requested.

51 MERC-CT: Thanks for the info. I read all that info. and found that it was not specific to my situation. Maybe it's just my interpretation but, the conversation seems to go "round and round". No definite answer on what parts to use on the Mallory Unilite with mechanical advance and the 605 module.

No doubt, engine compartment HEAT kills the module. I wonder if the module would run cooler if a series of small vent holes were drilled into the case of the distributor that faces the radiator along with a series of small vent holes at the backside of the distributor housing to let the hot air escape. The heat sink paste on the bottom of the module just seems inadequate. What's surprising is that one would think these modules would be
able to handle 180 degree temp. Or, perhaps a better way of providing a better heat sink for the module would improve heat disipatation.

Last edited by 19Fordy; 12-16-2019 at 10:35 AM.
19Fordy is online now   Reply With Quote
Old 12-16-2019, 12:22 PM   #19
flatheadmurre
Senior Member
 
flatheadmurre's Avatar
 
Join Date: Apr 2015
Location: Sweden
Posts: 2,538
Default Re: Mallory Unilite Distributor HELP requested.

I ran one of thoose units in a racer in the past...and after changing more then a few...and talking to their tech people...i was told to put the resistor in the feed of the module to drop the voltage down to around 10v when running to keep from frying modules.
The module uses the breakerplate as heatsink...if there isnīt enough compound between the module and the breakerplate it dies fast.
And a steelplate isnīt a to good heatsink from start...
Any semiconductor on a heatsink donīt like it to be hotter then that you can put your hand on the heatsink...about 60celsius...at that temperature the junction inside the transistor is just below what it can take.
flatheadmurre is offline   Reply With Quote
Old 12-16-2019, 12:50 PM   #20
flatjack9
Senior Member
 
flatjack9's Avatar
 
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 3,512
Default Re: Mallory Unilite Distributor HELP requested.

I've been running mine for over 20 years now. As I remember I shot for 8 volts at the coil.
flatjack9 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 12:22 PM.