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Where to Mount DuraSpark Ignition Module?

Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: General Automotive Technical Discussion
Forum Description: Technical Automotive discussion of anything not specific to mid-size Ford/Merc
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=19454
Printed Date: 21-September-2023 at 9:17AM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com


Topic: Where to Mount DuraSpark Ignition Module?
Posted By: Greg73Oregon
Subject: Where to Mount DuraSpark Ignition Module?
Date Posted: 12-April-2021 at 4:00AM
I have a 1973 Gran Torino with a 351W.  I'm installing a late model Ford DuraSpark distributor & module.
I could mount the ignition module just about anywhere (as long as it's away from a heat source), but I'd like to mount it where the later years were mounted. Even the LTD's or Cougar's location.
Any help is appreciated!

FYI: I work in electronics, so install is pretty straight forward.  I'm using the "Blue Connector" module.  I replaced the single pole "I" starter solenoid with a newer two pole style "S" & "I".  The "S" connects to the white ignition start retard line on the module.
Instead of wiring/tapping into the starter switch (Start & Run) wires, I connected the ignition coil wires to a 12V relay coil & grounded the other side.  When energized, the relay connects the battery via a fuse to the ignition coil (+) & the red wire on the ignition module.
During "Start" the relay gets full +12V.  In run, the relay gets around 9V.  Relays are spec'd at capture voltage and release voltage.  Once energized, the relay coil will hold until 5V or even a little less.
Because I'm using an after-market coil (Jegs), I don't need to use a resistor or the factory resistor wire.



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GKF



Replies:
Posted By: hogfiddles
Date Posted: 12-April-2021 at 4:38AM
on the inner fender is easiest. I believe my ‘76 had it on top of the driver side inner fender

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1973 Gran Torino Sport - Q code “Q-Clone” project-on-hold
1972 Gran Torino Sport - Q code new project
1972 Gran Torino - parts
1969 Torino GT - M code
95+/- mid-80's Yamaha XJ-Series (10 trophies)


Posted By: Greg73Oregon
Date Posted: 12-April-2021 at 5:39AM
Was it in the center, or more towards the front of the car?
Thanks.


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GKF


Posted By: hogfiddles
Date Posted: 12-April-2021 at 5:48AM
kind of on the upper area of the front slope, slightly off-center toward the engine, AND tilted at angle (not parallel to fender edge or anything else in particular.

-------------
1973 Gran Torino Sport - Q code “Q-Clone” project-on-hold
1972 Gran Torino Sport - Q code new project
1972 Gran Torino - parts
1969 Torino GT - M code
95+/- mid-80's Yamaha XJ-Series (10 trophies)


Posted By: Greg73Oregon
Date Posted: 12-April-2021 at 6:01AM
I can visualize.  The module has three mounting points, and the fender has many compound angles & slopes.  Thanks.

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GKF


Posted By: 1973gts
Date Posted: 12-April-2021 at 8:22AM
This is where mine was when I got it, doesn't lie completely flat but is pretty stable.                                                                                                                                                                                            


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Dave - 1973 GTS N code


Posted By: Rockatansky
Date Posted: 12-April-2021 at 10:22AM
you can cut some wafers of 3/8" hose to use as vibration isolators / levelers to go between the module and the inner tub Wink


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72 GT Ute
   


Posted By: mkshelton
Date Posted: 12-April-2021 at 6:25PM
That was where it was on my 76 Elite before I went aftermarket. Which I mounted centered on the fender housing. ( and looks better in my opinion)

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"Sometimes I wonder if I'm actually UNinventing the wheel"


Posted By: Greg73Oregon
Date Posted: 13-April-2021 at 4:10AM
That's fantastic!  Thanks! Thumbs Up
I think Ford mounted there, because my understanding is that the modules are sensitive to heat.


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GKF


Posted By: californiajohnny
Date Posted: 13-April-2021 at 4:40PM
a couple of the 74's i parted out had it mounted flat where the connectors are in dave's pic...


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JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION


Posted By: Greg73Oregon
Date Posted: 14-April-2021 at 5:22AM
I was looking at that location, but there doesn't seem to be a spot that I can get the three mounting holes lined up, and not overhanging towards the radiator.  Question

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GKF


Posted By: 1973gts
Date Posted: 14-April-2021 at 5:36AM
I'll double check mine when I get back out to the garage later today but I think it was mounted with only the two top screws.  I think I may go with Rock's suggestion and put some kind of rubber backing behind the module for the possible vibration issue.

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Dave - 1973 GTS N code


Posted By: 1973gts
Date Posted: 14-April-2021 at 9:29AM
Just checked and no bottom screw is in it, no hole on the inner fender for it either, it's feels pretty solid but I still might do what Rock suggested and use some rubber washers between the module and fender.

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Dave - 1973 GTS N code


Posted By: 72 RS 351
Date Posted: 14-April-2021 at 11:09AM
Have you noticed what lots of people are doing with their later model Mustangs? I'm guessing that it's a trend for lots of cars. They are moving as much of the wiring and under hood devices, out of sight in the fenders, outboard of the inner surfaces. Many are filling the holes with welded steel pieces, and grinding it all smooth, to repaint etc. I'll say it looks very good, but I'd consider that kind of project for a last thought for a car project. I'd make it all functional and reliable first.


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Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W
73 Ranchero GT 351C-4V &4R70W for sale later.
92 Lincoln Mark VII SE GTC, OBDII 347/4R70W


Posted By: n2fordwagons
Date Posted: 15-April-2021 at 12:57AM
Originally posted by 72 RS 351 72 RS 351 wrote:

Have you noticed what lots of people are doing with their later model Mustangs? I'm guessing that it's a trend for lots of cars. They are moving as much of the wiring and under hood devices, out of sight in the fenders, outboard of the inner surfaces. Many are filling the holes with welded steel pieces, and grinding it all smooth, to repaint etc. I'll say it looks very good, but I'd consider that kind of project for a last thought for a car project. I'd make it all functional and reliable first.

Yes, looks very clean, but I'm assuming any maintenance requires removal of the fender, especially on our cars.  As prone as the ignition modules are to failure, that could be a pain.


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Jeff

71 Torino Brougham
72 Gran Torino Squire


Posted By: 72 RS 351
Date Posted: 15-April-2021 at 2:42AM
Yes, I would never suggest that for the devices like the ignition module which might be common to have to get to.


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Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W
73 Ranchero GT 351C-4V &4R70W for sale later.
92 Lincoln Mark VII SE GTC, OBDII 347/4R70W


Posted By: Greg73Oregon
Date Posted: 16-April-2021 at 8:15AM
If it stops working, I'll take out the guts and install a GM HEI module. I did that on a '70 Maverick.
The only drawback is that there isn't a timing retard during engine cranking.


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GKF


Posted By: 72FordGTS
Date Posted: 16-April-2021 at 2:35PM
Originally posted by Greg73Oregon Greg73Oregon wrote:

If it stops working, I'll take out the guts and install a GM HEI module. I did that on a '70 Maverick.
The only drawback is that there isn't a timing retard during engine cranking.

Todd (aquartlow) used a 5-pin HEI module to get the retarded timing during cranking.

You can see his setup in this thread here:

http://forum.grantorinosport.org/infomsd-6al-points-trigger-oem-tach-duraspark-hei_topic16025.html" rel="nofollow - http://forum.grantorinosport.org/infomsd-6al-points-trigger-oem-tach-duraspark-hei_topic16025.html


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Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin


Posted By: Big Bird
Date Posted: 17-April-2021 at 7:31AM
Originally posted by Greg73Oregon Greg73Oregon wrote:

If it stops working, I'll take out the guts and install a GM HEI module. I did that on a '70 Maverick.
The only drawback is that there isn't a timing retard during engine cranking.
...And then the G.M. HEI module fails anyway. Not even as reliable than the Duraspark unit.



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"What we do in full frontal view, is more honest than your cleaned-up mind."
Randy
1979 T-Bird
2005 F-150 STX RCSB 4.6, 3.55 LSD
How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds?


Posted By: 72FordGTS
Date Posted: 18-April-2021 at 2:20AM
Originally posted by Big Bird Big Bird wrote:

...And then the G.M. HEI module fails anyway. Not even as reliable than the Duraspark unit.


I don't know if I agree.  I am not saying the HEI is more reliable than DuraSpark, but I have owned a lot of GM HEI cars over the years and have only  had one module failure (it was a newer ESC distributor, not the old 4-pin style).  Like the DuraSpark, a lot of the aftermarket HEI modules are junk, but the AC/Delco modules always held up well in my experience.  

The advantage to HEI over DuraSpark is that HEI has dynamic dwell and also has more ignition energy, especially compared the the common blue strand.  Also, it seems way easier today to get a quality HEI module compared to finding a quality DuraSpark module.  YMMV.


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Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin


Posted By: Big Bird
Date Posted: 18-April-2021 at 10:29AM
A lot of the G.M. cars I owned had a spare HEI module in the glove box.
My Thunderbird had the original Duraspark box fail only because the inner fender rotted thru behind it.
The first replacement box (aftermarket Chinese part) looked normal but had a HEI module inside.
Lasted a couple years. Current box is a junkyard part od unknown mileage and no problems.


-------------
"What we do in full frontal view, is more honest than your cleaned-up mind."
Randy
1979 T-Bird
2005 F-150 STX RCSB 4.6, 3.55 LSD
How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds?


Posted By: Greg73Oregon
Date Posted: 15-May-2021 at 10:50AM
Update:  Mounted on the wheel well where 73 GTS showed in his picture.  I had a real hard time locating the connector that plugs into the distributor.  From a local "Pick-a-Part", I scavenged most of the wiring out of an'80's Ranger.
Works like a champ! Since I installed a relay (powered by the existing coil wire), and ran the relay input directly to 12V, and the output directly to the coil & module; I had a problem that the engine wouldn't shut off.  There was enough leakage voltage coming back from the charging circuit to the ALT dash light to keep the relay closed.
Solution: installed a diode in the regulator "I" terminal wire going to the dash light.  Problem solved.


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GKF


Posted By: rancheromac
Date Posted: 19-July-2021 at 6:47AM
put it where the current mount is, or where current wires tell you . why you moving it ? also forget that HEI chevy crap !


Posted By: Greg73Oregon
Date Posted: 19-July-2021 at 9:12AM
???
Mine was a points system. I gathered all the parts to switch to a Duraspark.  I mounted where others had indicated theirs were (factory) mounted.


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GKF



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