Voltage stablizer is store the electric and stable it up to 14v, so any electric device in your car have enought energy to work well.
There is just only one wire for the current of electric return back to the negative point of the battery, so when you turn on all the electric device in your, the negative point will be traffic-jam, and the battery is hard to be charge back. Grounding wire can help to slove this problem.
And the spark amplifier that I mention before is boost the voltage to inigtion coil, from 12v to 16v, just think normal 12v enter the inigtion coil and output to 25,000v. If the voltage enter to inigtion coil is 16v, then the output is over 30,000v.
For regular engine, when try to rev it to high rpm, the voltage to the inigtion coil will begin drop, due to engine is very hot and rev too fast, the firing order will delay abit. After installing the spark amplifier, the voltage give to inigtion coil is more then enought, event rev it GAO GAO, the voltage also remain above 12v. So the engine respond is more SOLID