The whole concept was basically an extension of using gold plated fuses to improve the sound quality in hi-fi stereo systems. (A Google search under "Fuse Tuning" will show a bunch of links on this.) The claim was that gold plated car fuses would enable the car's stereo to sound better, and the ECU to operate more accurately, etc.
However this concept seems to be a gimmick that quickly ran its course... still, the logic seems to be undeniable, we all see those gold plated stereo wires...
The leading company was called Ritz (which apparently now is out of business, surprise surprise) and had these types as well other types of these fuses:
On this website that sold the Ritz fuses, they even have a dyno chart showing the before and after, and even better the car used was an R33 Skyline which shows a 0.5kg/m increase in torque, plus 18.7ps increase in HP!!
|Apparently changing 10 fuses is all it takes!!|
|These aren't made anymore... and are listed as out of production on Amon's website here|
|Before I switched the fuse for the RIGHT headlight|
|After: See the difference? Not really, yeah me too...|
|After...I tried to stand in the same spot...a very slight difference? LOL|