Two questions. First is a basic question about the xB ignition system. I know that it is a distributorless system that uses separate coils and ignitors for each cylinder. However, I have been looking into the MSD Stacker Ignition and there are two applications for distributorless ignition systems. One, the 7010, is "designed to work with DIS vehicles with coil packs" and the second, the 7020, is "for engines with non-integrated individual coils per cylinder". Sounds like the 7020 is the system that would work w/ the xB, but wanted to make sure as after doing a search about our ignition systems some have mentioned that we have "coil packs" in other threads. Anyone who can shed some light on this?

My second question has to do with any opinions about "piggy-back" ignition systems like the MSD stacker ignition. Anyone had any experience with this system for the xB or any other application? Below is a quote from the product description and a link to the MSD site:
http://www.msdignition.com/
From MSD web site"
"The MSD Stacker Ignition connects to your vehicle’s wiring without disconnecting anything! Actually, the factory ignition remains in place and the Stacker delivers a powerful CD spark to improve the initial ionization of the plug gap to improve combustion in the cylinder. The two spark profiles work together to give you a great boost in ignition power in an economical ignition control. The majority of stock ignition systems are inductive designs. This style is inexpensive to produce and is adequate for OEM vehicles. Inductive systems generally have fair spark intensity, but fall short when it comes to high rpm operation and high voltage for performance engines. The MSD Stacker Ignition produces a high powered CD spark on top of the factory inductive spark so essentially, you receive the benefits of both spark profiles! The Stacker Ignitions simply “piggyback” your factory ignition wiring. This is an advantage in that the factory ECU continues to see the factory ignition signals so there should be no check engine lights or tachometer problems. There are three versions of the Stacker offered depending on the application. Each Stacker is supplied with everything you need for installation."

 

Finally got in touch with a MSD tech. FYI, neither of the stacker ignitions will will work with the xB/xA. What the tech told me is that because the xB has an integrated coil and coil driver that they can not develop an application. Their piggyback ignition systems are designed to be wired in-line between the coil and the driver. So, no go. He basically said that aside from replacing the entire ignition system, which he did not recommend, that their is no real alternative for beefing up the stock ignition. However, he did say that if adding any kind of forced induction that requires managing the A/F then replacing the ignition system might make sense.