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  #1  
Old November 1st, 2019, 20:07
RCP Phx RCP Phx is offline
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2000/4.6/Screamin-Demon/Holley MSD

It has started I'll keep you updated on the progress.
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  #2  
Old November 2nd, 2019, 08:03
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

My MSD will be here tomorrow, the coil will be here Wed. I got some more chromoly coming and I have the order in for 2 more 3' K Fab harness's.
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  #3  
Old November 2nd, 2019, 21:43
Scrubber3 Scrubber3 is offline
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2000/4.6/Screamin-Demon/Holley MSD

Sub'd
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  #4  
Old November 6th, 2019, 20:36
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

I received the MSD today. It comes with a 6' main wire harness and wire outputs for power and accessories. I am not going to use the harness and I'll "clean" up the rest. Waiting for lots of things to show up so I can get really going.
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  #5  
Old November 7th, 2019, 10:09
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

I've got a lot of wiring to deal with!
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  #6  
Old November 7th, 2019, 15:37
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

Well give or take a 1/4", this where it's going to go.
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  #7  
Old November 8th, 2019, 09:10
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

I received my Screamin Demon coil. It feels heavier at 3lbs3oz but I need to check the JK coil when I take it of. The resistance is lower at .6 ohms vs the JK at 1.0 ohms. I'm still waiting for all the new connectors plus the 2 wiring harness's.

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  #8  
Old November 8th, 2019, 09:21
Ralph77 Ralph77 is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

Some I am wondering about a couple things.

Is the MSD a coil?
Guessing that is going to require you to get creative with wiring?

The Screamin' Demon is for a JK with the 3.8?
I am guessing you are trying to figure out if it will work with an '00?
Does the harness from Ksuspensions plug onto the Screamin' Demon coil?
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  #9  
Old November 8th, 2019, 09:35
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

The MSD is just a Multiple spark dis-charge for a distributorless system.

The wiring won't be bad, it's going to be plug-n-play. If you look at the one pic the MSD comes with a by-pass plug in it were to become in-operable.

The Screamin Demon coil is for a JK as is the stock JK coil I just installed.

The K fab is is a direct fit for the conversion.
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  #10  
Old November 8th, 2019, 09:42
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

Here's the MSD instructions........ https://documents.holley.com/62152.pdf
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  #11  
Old November 8th, 2019, 09:45
Ralph77 Ralph77 is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

OK. Thanks for that.

There is no way I am spending that much money for the MSD but was curious.

Cause I was wondering if I should maybe upgrade.

A Caravan aftermarket coil is what comes with the Ksuspension set up.
Or you can buy the Mopar one for the same vehicle.
Or you can go with the Viper/V10 Ram coil in either an aftermarket or Mopar one.
Then there is the Screamin' Demon JK.

Going to be curious as to what you figure out with the resistance you were talking about above and if it is a suitable part.

Not going to lie. All this goes over my head.
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  #12  
Old November 8th, 2019, 10:01
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

Couple of points:
I wanted spark plug wires, that's where this started, the MSD was a after thought to get better HP/MPG.

You could do the MSD unit with the factory coil rail.

The Screamin Demon coil is the "JK/Viper" coil.

The resistance is critical because the increased amperage on the PCM driver(might burn out), in my set-up the MSD powers the coils.
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  #13  
Old November 8th, 2019, 10:06
Ralph77 Ralph77 is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

I did not understand at first that the MSD was not a coil but an add on feature for the coil.

Also did not realize that the resistance you were concerned about was for when used in conjunction with the MSD.

Thinking it might have been a problem with the Screamin' Demon coil when used alone in an '00 XJ.

In my defense as I stated above this all goes over my head. LOL.

So thinking if and when I do this just go with the Screamin' Demon coil, the Ksuspension harness, their bracket or fabricate my own to do what you did, get some quality spark plug wires, and call it a day.

By the way thank you for taking a deep dive into this and figuring all this out.
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  #14  
Old November 8th, 2019, 10:14
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

I am also concerned that using the Screamin Demon coil in the "bypass" mode will be a problem for the PCM.

As far as I know the K fab kit only comes with the standard JK/Viper coil not a Screamin Demon (aftermarket) coil.
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  #15  
Old November 8th, 2019, 10:26
RCP Phx RCP Phx is offline
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Re: 2000/4.6/Screamin-Demon/Holley MSD

Quote:
Originally Posted by Ralph77 View Post
Also did not realize that the resistance you were concerned about was for when used in conjunction with the MSD..
It's not when used in conjunction with the MSD.

Because the MSD powers the coils separately is why I'm using the MSD.

If you do a Screamin Demon coil using the factory system your PCM will see high driver currents.
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