polywave,

I appreciate input from ANYONE with more real world experience than me.

I've been 'dabbling' in electronics and automotive customizing for years. No professional experience at all.

I would have to agree with everything you said on the performance of the capacitor and the grounding system and the way I know automotive electrical systems to function.

A grounding kit will do one thing for sure on most production vehicles. It will almost eliminate that 'stop-light-idle-flicker of interior/dash lights under heavy load of the electrical system. It will also make your headlights brighter under that same heavy load at idle (and in gear, if you have an automatic). It may not completely get rid of it, but it will help a lot. Most of the chassis grounding systems I've seen over the years (new and old cars) were far from being able to handle the maximum amperage that the electrical system (chassis side) could draw from the alternator/battery.

Almost always the 'ground strap' is about half the size it needs to be and is not properly soldered copper to terminals. It's usually a crimped braided steel strap or some such.

As to the HP gain claim. If there is any, it will be so small as to be undetectable unless you get a REALLY precise dyno and consistent runs (yeah, right).

I will probably do this mod eventually.

Cheers!