Re: YJ coil replacement
A.B. is just plain wrong.
The MSD 6 series module will do more for your ignition than all of the other aftermarket gadgets combined.
You will see the same performance upgrades with the new Jeep that you do with every other new fuel injected vehicle.
It's basic Physics. It works the same way all the time....
Until factories start using Capacitive Discharge Ignitions, and Multiple Spark Discharge Ignitions, the MSD 6 series modules will continue to be the single most cost effective upgrade anyone can do.
Don't forget about getting the more useable spark energy to the plugs...
1. That means a good coil,
The MSD Blaster II is a good coil, and it's wound correctly, and it will work fine with your stock ignition.
It probably will only marginally out preform you stock coil in your stock application.
If you are going to use a MSD 6 series module, use your stock coil.
The MSD module will make your stock coil out preform any of the aftermarket coils by 100 to 1,000%.
Your stock coil, and the MSD Blaster II will run almost exactly the same output if you power them with the MSD module.
2. That means a good cap and rotor...
Use a premium cap and rotor, no matter what coil or module you use.
Your cap and rotor is the place where the most ignition energy is lost.
Don't use cheap aluminum terminals, and rotors made cheap, they bleed energy.
Using a good quality cap will get the spark energy to the rotor first, then to plug wire with a minimum of parasitic loss.
Premium distributor caps will have correct terminal placement, so the spark energy goes where it's supposed to.
A good quality rotor will have a brass blade, and the blade will reach out far enough to keep the air gap to the plug tower to a minimum.
A good rotor will have precise distributor shaft alignment guides to insure correct timing.
3. That means a good plug wire set...
Once the spark energy is created in the coil, it's up to a good set of plug wires with coil wire to get it where it needs to go.
NEVER USE SOLID CORE WIRES WITH AN ELECTRONIC IGNITION...
Your best bet is a set of low resistance MSD helically wound wires and coil wire...
If you are considering using a MSD 6 series module to upgrade to Multiple Spark and Capacitive Discharge, let me know, and I'll send you a wiring diagram for the MSD module that keeps you emissions legal, doesn't defeat the computer controls and will still give you full benefit of the CDI and MSD upgrades...
Good luck, and hope you are not confused,
"I Have The Body Of A God... Buddha"