<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:<hr /><font size="1" face="Verdana, Helvetica, sans-serif">Originally posted by pyros:
<strong>If anyone can explain why a grounding kit would provide more power , then maybe i'm willing to believe . It looks neat , just like those computers with hot cables and lights inside but performance nope i don't think so .</strong><hr /></blockquote><font size="1" face="Verdana, Helvetica, sans-serif">Actually the grounding problem is an old one in cars. Its not a problem of factory ground cable quality or something. In an electric, or electronic circuit, the ground means this: A SINGLE point of ground, where all negative terminals of each element join together and the voltage at this specific point is considered 0 volts. This is critical for all calculations the electrical engineer makes when desinging the circuit.
In this case, measuring the impendance (or resistance) between two negative terminal of two elements, it should be 0 Ohms.
In the car, the grounding point, is not a point, its the chassis itself. But the chassis is not a solid single piece of metal, but its made by many metal parts joined together. This "join" is not electrically perfect, creating some electrical resistance between the chassis parts. This means if you measure the ground with a Ohm-meter from the boot to the front of the car, it may show 1 or 2 Ohms. This is very small resistance, but it creates ehmm whats the english word damn it. Anyway the electic or electronic devices or sensors that are spread around the car, do not have common ground as they were designed on paper. This creates problems of false sensor readings, or electronic units co-operation.
By installing a grounding kit, you join all chassis parts together, making the whole car a perfect grounding point, eliminating the phenomenon I mentioned above. If the ECU is affected that much by inproper grounding, maybe it could give 1bhp more since it will have more accurate sensor feed. But this depends on the car model. It could make difference on a Civic, and not on a Corolla for example.
Just my 2p
PS: Common grounding is CRITICAL to ICE installations too. This phenomenon degrades very much the sound quality. Head unit, cd-changer and amp, should be grounded AT THE SAME POINT, and this point should be connected with the battery's negative pole ( as a mini grounding kit ).