This is about the way that this Hemi runs, not about all the cool things that have been done in the last 40 years to make the engine work more efficiently. In the October issue of Hemmings Muscle Machines, there is, in addition to the very cool article about the new Challenger, an excellent article about diagnosing problems on an engine. It is called: "The Lost Art of Diagnosing Engine Problems," and is written by the very knowledgeable and experienced Ray Bohacz. It describes the way to properly attack a running issue, and covers a lot of the basic things that many of us seem to forget to check. I cannot argue strongly enough for a careful and thorough diagnostic routine. This article says everything that I would like to say every time there is a running problem with a vehicle, and people call me for help. Often, the real problem is simple, and would have shown up within the parameters of a proper diagnostic routine. Fix the problem first, and then think about upgrading parts. I have no problem with my ignition system due to low voltage (I have checked, and it is indeed 6 V), and if the voltage to the coil needs to be increased for better performance, then there is a problem with the coil or another component of the secondary portion of the ignition system. I have never said that there are no improvements to the wheel, just that the wheel worked just fine without them. I have seen the results of the DUI testing on the 360, and was impressed. I am sure that the major improvements came from the closer tolerances and better quality control lavished on the DUI part, and not due to any greatly improved circuitry or technology applied to the rest of the system. The GM HEI is a fine setup, but is just that- a GM design. I will keep my MOPAR as MOPAR as I can, because of my principles, not because I am a stick in the mud. Where there are shortcomings in the stock system, I never just "deal with it," but try to figure out a solution that does not result in reinventing the wheel. The major improvement made to the HEI system, as done by DUI, is a better dwell control in the ignition module. Basically, the DUI on a MOPAR is just a neat way to package the best that GM or MOPAR could offer, for those of us that want a less cluttered engine bay. The aftermarket controllers are great, but unnecessary in a basically stock, or near-stock application. It then becomes a matter of personal preference.
