Đây là một bài ở diễn đàn khác nè các bác, thử đọc tham khảo thêm về grounding kit :
What if poor grounding?
Your stock car has complete grounding system but it may not be GOOD. Poor grounding means there are RESISTANCE between, if there are resistance, electrons that are trying to pass your electrical appliance will be slowed down or blocked and thus lower the amount of current supplying to those appliances. So what? those appliance doesn't get full current and of course not operating in optimum state.
In old car, the body metal is degraded and not so electrical conductible and thus resistance is even high.
How to know if your car has poor grounding?
All you need is a VoltMeter to measure the electron flow. Normally when you touch the red measuring point of Voltmeter to positive terminal of battery and same for black/negative point, you will get a voltage reading because electrons flow from negative terminal of the batttery through the circuit of voltmeter and then flow out to battery's positive terminal.
For example, we measure how good is alternator's grounding:
First, start your car, then touch voltmeter's red stick to negative terminal of battery and black stick to outter metal of the alternator. If the original grounding is not good, then electron will tend to follow your voltmeter stick to battery's negative terminal and you will see a certain voltage reading.
Well now don't move the voltmeter sticks, use a thick grounding cable to touch the alternator's outter metal and battery's negative terminal and you will notice the voltage dropped, this is because those electrons rather flow through the grounding cable instead because it's better in conductivity. If no voltage drop after you apply the grounding cable, it means that your existing grounding system is good. However don't be so happy about this, you are measuring this while your car is not moving/reving, if you move your car, electron flowing rate is higher (Because alternator is spinning faster) and your existing grounding may not be enough anymore. Not last, you're only measuring the grounding between alternator and battery's negative terminal, there are many points still.
Các bác xem thêm pic các ví dụ ở đây
http://forum.lowyat.net/topic/1495749
và kiểu chạy thế nào nữa... mỗi loại nó có điểm tối ưu hoạt động, kid xem ở phần spec của bugi!
