Chrysler 300S / Dodge Charger Electrical Ground Upgrade (Big 3) | AnthonyJ350

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We upgrade the electrical system in our 2018 Chrysler 300S with the Pentastar 3.6L V6. It's similar to doing the Big 3 upgrade except we're not upgrading the positive cable from the alternator to the battery as it's a very long run and we find the factory cable is adequate.
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Chrysler 300S / Dodge Charger Electrical Ground Upgrade (Big 3) | AnthonyJ350
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Опубликовано:

29 сен 2024

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Комментарии : 41

@BoOmBaMan Месяц назад

Yes that wire hooked up to the block looks to be a direct ground point. I had done an upgrade to an older lexus. The battery had serious draw when the ground terminal was weaker than positive. Always leaving the battery drained. Grounding placements actually matter like you said with adhesives or paint for conduction. Also not grounding too close to any positives I'm sure you know about feedback signals and loop prevention

@AnthonyJ350 Месяц назад

Ya it was a bit difficult to avoid the giant 2 gauge positive line that runs the length of the car. We'll see how it does over time.

@seanf6968 День назад

Was there a difference in performance or mpg

@AnthonyJ350 День назад

Smoother idle mainly and the sound system sounded more clear at high volume.

@janet53589 Месяц назад

For the information of readers here, a comment regarding the issue of electrical system noise on rear battery cars mentioned in the video. As an electrical engineer, I can say that yes, there could be a small problem with noise due to long wire lengths to the trunk causing increased AC impedance. However, it really should not need another battery in the front to fix it. A suitably sized largish Farad capacitor in the front would be sufficient and more durable. These are available I understand, particularly for audio system installation. The capacitor should be placed at the very high current sections of the electrical system (e.g. close to the alternator and battery junction) to firmly decouple the noise. Optionally, it may be useful to place a second smaller capacitor on the power input feed to an audio system if noise persists. That really should do it. It may not in fact need a capacitor that large in practice, they are very effective.

@janet53589 Месяц назад

(I meant to say the alternator and battery bus junction in the front, clearly the battery itself is in the rear.)

@AnthonyJ350 Месяц назад

Thanks for sharing your knowledge. It's very uncommon to see capacitors in any install, especially in higher end installs. Just saying not a common practice.

@janet53589 Месяц назад

It's hard to say if the AC impedance of the wires to the trunk would be high enough to cause a problem with noise. It also depends on the noise rejection capability of the equipment on the power bus. If problems occur, the first place to look would be grounds being sufficiently solid so as to prevent troublesome ground loops. Then second, the use of capacitor(s) placed suitably. I don't know if this is a common technique or not, you say not, but this is nevertheless the correct electrical engineering solution and is practiced universally across all equipment. An interesting fact is that capacitors have a lower (stiffer) AC impedance than batteries in the frequencies of interest by the way. Capacitors used correctly can also remedy a soft ground problem.

@AnthonyJ350 Месяц назад

@@janet53589 The capacitors used in car audio, I've never seen one mounted in the engine bay or closer to the front of the vehicle. Correct me if I'm wrong, but in order to filter. Wouldn't the connection require to pass through the cap in order to filter? Because the caps in car audio are setup like a battery and current flows on top at a terminal.

@janet53589 Месяц назад

@AnthonyJ350 For context, let me assure you that dealing with noise has caught out many a good electrical engineering designer! The term of art is called: "decoupling capacitor". It's purpose is to create a small independent island of clean power reservoir. i.e. it decouples the item from the effects of the rest of the equipment. There are two options for use. 1) Place a capacitor right across the power and ground feeds of the sensitive device right next to it, close. 2) Place the capacitor right across the power-ground connections of the source of the noise, e.g. alternator. Depending on the AC impedances involved either method 1 or 2 may be more effective, or even both. These techniques can also relieve the dependence on the ground, and thus can be used to remedy a soft (higher AC impedance) ground problem. If problems persist, it may be necessary to go hard core and put in an inductor-capacitor filter pair, where the inductor is in series, and the capacitor in parallel, but that is beyond the scope of this message. The overall goal is to use the smallest and lowest Farad capacitor that solves the problem. Hope this is somewhat clear and helpful!