Coincidentally, Holley also owns one of MSD's direct competitors in terms of performance ignition coils. You are right, though, about not needing to get rid of the stock coil. This is why you see them gain popularity ahead of competitors: Taming your expectations: MSD ignition coil vs stock performance. Ignition systems have come a long way in the last two decades.
Currently, several companies produce these elements for the same motor. Even though our Vortech supercharger was installed 20, 000 miles ago and the plugs have yet to be changed (it's important to note they're one step colder than stock), the car baselined within a few horsepower of our original best pulls done at the time of the supercharger installation. Specializing in ignition parts, Performance Distributors has developed coils, distributors and many other parts for a wide range of vehicles over the years. The key is to maintain coil voltage under load -the acceleration phase, with little or no drop-off. The traditional high performance ignition coil is one that has a different windings turn ratio than stock. In an ignition system, it is one of the key components, since it creates voltage. Supercharged or naturally aspirated, the coil packs can be used in either variation! 2 coils and it may have not even been a coil problem just a coil pack housing problem. Nope, does it matter? Folks don't seem to understand that the factory ignition module monitors current through the coil in order to bring it to saturation, then the module limits current until spark is generated. The SS helps run a hotter spark, is more durable due to the improved brass terminals, and the Rynite housing keeps it intact for longer. Are the housings cracked or windings shorted? As long as you run performance boosts, it's worth it for the few extra ~8-11 HP and better throttle response. Many times we've had customers install our Performance Software and come back with, "I'm now getting a misfire code. "
All of MSD's replacement coil packs accept the factory wiring harness to make installation a breeze and keep the OEM controls happy and functioning to specifications. You'd be surprised at the number of people who have asked me this exact question: Is it worth it to go for MSD ignition coils over stock? Autolite Spark Plug Swap. I totally understand bumpin's POV on the coils however, I have them (the ZZP ones) and theyve been great. Even if we had the code given to us, the time required to learn and modify it is prohibitive. If you are going to replace your coil anyway though, might as well make it a good one. It is the sole responsibility of the customer to determine that this item will work for the application they are intending. Assume the stock coil is fully fuctional. Its just, if you're gonna use of the MSD interfaces, then its better than not to have all MSD stuff. Peak current is 220 mA. Even then, I still wouldn't bother with these over JY coils or stock replacements. There was a post about a couple people having trouble before and everyone jumped in to condem all coils msd has fixed their problems. Spark plug wires deliver high voltage electricity to each spark plug. The coils feature encased windings in an injection molded housing that bolts directly in place of the original coils.
To the OP if u get a new coil keep the stocker just in case. That must be for the LD9 coils, as my OHV still is running on the factory OEM coils after 13-yrs & 190, 000mi. 7 Hemi Engine Spark Plug Gap. Why So Much Voltage? What do you mean they're on their way out? Most coils have time to convert the electric to high voltage before the next spark. Naturally, this is also a good time to replace the spark plugs (we recommend factory spark plugs ONLY) as they are likely aging also. So while yes, they're expensive, for such setups the MSD coil packs can be a viable performance boost. Manufacturer: MSD Ignition. The stock coil is more than adequate. Full DME control of ignition coils: Yes. The fewer the windings and the larger the wire in the primary side causes more current and the more wraps of thinner wire there are in the secondary side of the coil causes higher voltage output to your plug which in turn gives you a stronger spark!!!!
Depending on the coil, this can be 20, 000 or 60, 000 volts and beyond. With respect to power at peak output, at 6, 000 RPM these coils really had everything coming on strong with increases of 20 HP and 18 lb-ft. Driving. Oh Slowolej, My IAC or the driver for it in my MS-II is really @! The Hemi employs a coil-on-plug ignition system, so any performance changes would be a direct result of an aftermarket 5.