Duraspark II which wire to delete? HARNESS AND NEW BOX DONE

[broncnaz]

Yes current limiting is basically a CD type igintion. I think that coil has like .4 ohms resistance.
There are very few coils that dont need a resistor even then a lot of the ones that dont and are used on "standard ignition" systems have the resistor built into them. Example would be the pertronix coils, Ive also gotten coils at NAPA that are marked no external resistor needed and I think old VW's had a coil that had the resistor built into it.

 

[savage]

With the black grommet box that I had , and the centech resistor, it read at the positive side of the coil 8 volts. So my question is, if I wirer it using the .8 ohm resistor, that is in the msd instructions, it should still work fine, or will it limit the out put voltage on the coil.

 

[savage]

Here's the stats on this coil. http://www.msdignition.com/Products/Coils/Street/Strip/8207_-_MSD_Blaster_SS_Coil.aspx

 

[broncnaz]

Id almost say you dont need the other .8 ohm resistor if you keep the current resistor. If that is what the tech is saying then Id kinda agree you've got the voltage down to a safer level. If I remember right I measure about 8-9 volts out of the stock wiring at the coil.

 

[savage]

I have to replace the centech resistor any way because its broke, so I think I'll just pick up the one msd says to use in their in instructions the .8 ohms. The centech harness doesn't have a resistor wire ,like the originally harness did. Just another thing in the pot, So I'll make the new harness with the resistor in it.

 

[broncnaz]

Go to the parts store you should be able to get a 1.2 ohm ballast resistor easily. Might even be able to get a .8 one.

 

[DirtDonk]

The instructions on the standard "oil can" style #8202 and #8223 coils state only that you need the .8 ohm resistor when using with points. Nothing about any current-limiting ignitions.
Maybe it's just this e-core type like you have that needs it, or at least this specific model of e-core style

I was under the impression (have not googled it though) that the "e" in e-core simply stands for epoxy. Where yours has polyurethane instead. Probably two different types and I should not have even mentioned it!%)

And speaking of rolling eyes... Did you notice where they state that you should add your resistor "in series" to any existing resistors from the factory? Oy vey Skipper!

Paul

 

[Viperwolf1]

By the way... Not being up on my ohm's law stuff, what voltage do you end up with when using an .8 ohm resistor in a 12v system?

Thanks

paul

It depends on the resistance of the coil primary also. If both the resistor and primary were .8 ohms you would get 6v at the coil. If the primary was 1.6 ohms you would get 8v at the coil.

 

[broncodriver99]

I was under the impression (have not googled it though) that the "e" in e-core simply stands for epoxy. Where yours has polyurethane instead. Probably two different types and I should not have even mentioned it!%)
Paul

Nope. The "E" references the shape of the laminations that make up the core of the coil. Hence "E Core"

 

[savage]

I'm putting it out their, has any buddy with a centech harness, blue duraspark module, ford electronic distributor and after market coil (blaster ss or equivalent to it ),run straight 12 volts to and by pass the resistor? So I called MSD tech AGAIN ,and he said the coil it self doesn't need a resistor, but it depends on my system. I told him what I had ,that's listed above, then he ask do you have points, I said NO, then HE SAID duraspark doesn't need a resistor, and kept repeating the same thing then ending with the coil doesn't need a resistor. Then CLICK .....GREAT CUSTOMER ASSISTANCE. So I think I'll just make the harness the way the schematic shows, and get this bronco back on the road!!!

 

[jckkys]

I have 2 blue strain relief Motorcraft modules part #D9VZ-12A199-A and the 2 wire connector has RED and WHITE wires. This agrees with, Chiltons, Motor, etc. Viperwolf is either color blind, dishonest, or both. Try searching yourself. No Duraspark II modules came with a 2 wire connector using any other colors. If FACT threatens his status as site know it all, that's OK with me. He apparently needs a lesson in honesty.

 

[broncodriver99]

I will just leave this properly color coded factory wiring diagram here.

 

[DirtDonk]

Good on you 99. Sorry I just couldn't leave it at that for once.

Really jckkys? What?
I'd say he might have given you a little (well deserved sometimes?) roast, but you're just being a dick. Big difference.

I have 2 blue strain relief Motorcraft modules part #D9VZ-12A199-A and the 2 wire connector has RED and WHITE wires.

Well, maybe you should be using D7 modules for reference instead of some from two years later?
Yes, the '79 modules you describe could obviously have come with your colors, or also could have come with the White and Blue w/red strip wires in the plug. Notice the stripe.
And early ones probably had the third, unused Brown wire as well shown in some diagrams as well. It's been well discussed (not necessarily documented though) that even Ford made running changes during production. What they and the aftermarket did after that and why, was anybody's guess.
That agrees with my Hayne's book, and I've SEEN those as well.

It's been my experience (not as extensive as Vipers, and for that matter, probably not as much as yours either) that the Ford colors on original modules were often slightly different than those available on later ones. Whether from Ford or the aftermarket.
Some were just changed slightly (eliminating the stripe for instance) or extensively (not even the same colors) but I've seen both. And I don't remember ever seeing an original '70's Duraspark module that did not use stripes on at least one wire. That doesn't mean it didn't happen. Just that saying solid colors are the only way it could have been is just wrong.

My Blue grommet boxes didn't match any of the originals I had, nor did they even match the striped colors of the original distributor side connectors.

This agrees with, Chiltons, Motor, etc.

Sorry, doesn't agree with mine.
Which Chilton's are you using for reference? Mine is the "66-77" version and clearly shows (incorrectly possibly) that the 75/76/77 models all had the Blue and Blue w/red wires. Not even a mention of a White wire.

This alone was why I had some hair pulling sessions when trying to hook my first conversion up for the first time. The Ford supplied and aftermarket supplied modules did not match the original wiring diagrams I was using.

Viperwolf is either color blind, dishonest, or both. Try searching yourself. No Duraspark II modules came with a 2 wire connector using any other colors. If FACT threatens his status as site know it all, that's OK with me. He apparently needs a lesson in honesty.

Not going to go any further with this. Already called you a dick and that's more than I like.

Paul

 

[DirtDonk]

Nope. The "E" references the shape of the laminations that make up the core of the coil. Hence "E Core"

Thanks. I think I'd heard that long ago, but had long since had epoxy on the brain.

Now we'll see if I can purge it!

Paul

I'm putting it out their, has any buddy with a centech harness, blue duraspark module, ford electronic distributor and after market coil (blaster ss or equivalent to it ),run straight 12 volts to and by pass the resistor?

Yes. Me.
As well as six others that I've installed and many I've run with different (including stock) harnesses.
So far no coil failures, but I can't say that I've ever used the same one you have exactly. Just the Blaster family is all.

So I called MSD tech AGAIN ,and he said the coil it self doesn't need a resistor, but it depends on my system. I told him what I had ,that's listed above, then he ask do you have points, I said NO, then HE SAID duraspark doesn't need a resistor, and kept repeating the same thing then ending with the coil doesn't need a resistor. Then CLICK .....GREAT CUSTOMER ASSISTANCE. So I think I'll just make the harness the way the schematic shows, and get this bronco back on the road!!!

He sounds pretty certain, so go for it. Much easier than using a resistor anyway.
And easier than finding a place that it can stay cool and not melt the paint off as well.

Paul

 

[savage]

I have 2 blue strain relief Motorcraft modules part #D9VZ-12A199-A and the 2 wire connector has RED and WHITE wires. This agrees with, Chiltons, Motor, etc. Viperwolf is either color blind, dishonest, or both. Try searching yourself. No Duraspark II modules came with a 2 wire connector using any other colors. If FACT threatens his status as site know it all, that's OK with me. He apparently needs a lesson in honesty.

Hey, I DIDNOT START THIS THREAD TO BASH VIPER OR ANYONE ELSE. If you can't look at Vipers diagram, and figure out where to hook up the white and red wirer, you should not do wiring! Here is Viper's and one that show's your WHITE WIRE.

 

[savage]

Hey Paul, I'm going to by pass the resistor and see how it runs, almost done with the harness .I'll post some pics Thanks to everyone that helped.

 

[Viperwolf1]

I have 2 blue strain relief Motorcraft modules part #D9VZ-12A199-A and the 2 wire connector has RED and WHITE wires. This agrees with, Chiltons, Motor, etc. Viperwolf is either color blind, dishonest, or both. Try searching yourself. No Duraspark II modules came with a 2 wire connector using any other colors. If FACT threatens his status as site know it all, that's OK with me. He apparently needs a lesson in honesty.

Wow. I'm sorry you feel you have to resort to defamation and slander with malice intended. You are now officially the first person I have ever placed on my ignore list. It's a shame because I thought you had some good info to share, until now.

And let me just say that I'm pretty sure NO early Broncos came from the factory with D9VZ part numbers anywhere. Not sure what the relevance is to them.

 

[Viperwolf1]

Hey, I DIDNOT START THIS THREAD TO BASH VIPER OR ANYONE ELSE. If you can't look at Vipers diagram, and figure out where to hook up the white and red wirer, you should not do wiring! Here is Viper's and one that show's your WHITE WIRE.

When using my diagrams don't get hung up on wire colors because newer parts may have different colors. Pay attention to the pin locations. That's why I drew them into the diagrams. I spend a lot of time researching things like this and I know they are correct.

 

[savage]

I have no problem Viper, with your diagram, I did look at the pin locations and it work out great for me, I just got tired of jckkys ,complaining about the colors, and not realizing you have to look at the pin location, and thanks for all your help and everyone else, I just finished the harness and installed it, only thing left is to decided which way I want to wirer the box red and white wirer and positive side of the coil.

 

[jckkys]

I thank savage for the honesty to site an accurate diagram. I can provide endless pictures of actual Duraspark II modules that ALL show the 2 wire connector with a red and a white wire. Of course none of the bloviating site know-it-alls have the balls or honesty to admit they can't provide one photo that agrees with viper's incorrect diagram. When this discrepancy was pointed out vipor assumed a condescending attitude and went on to throw in an insult. This exposed him, and later Dirtdonk who rather than even look for the truth spouted more insults, as the assholes they are.