Capacitors DON'T reduce strain on the electrical system! The Amp is still sucking the same amount of power from the alternator/battery. They merely are a small pool of electricity. If your going into the red with that amp, your alternator is dying, or almost dead. It'* merely a patch. If you have a good power system, a Cap is there just to keep the big hits from dimming the lights IMO.

Both of you need new alternators, as Don said, Go AC delco, or go to the store a lot. I was able to get my 140amp beast for $12 more then the standard 105.

yes I think that I was the first to put the AC Delco 140 in. and trust me I am testing that thing to the fullest......... with an underbody kit, 15 interior neons, grille neons, and the amps, with the A/C on im at about 12 on the battery gague and 12.X on my cap. with everything off except tha amps I show 14.8 on the cap

By the time I buy a 1/2 farad cap I would be 1/2 way to the cost of a new alt. and the cap (IMO) is a poor bandaid for a weak alt.

I am pretty positive it is the alt because when I first installed my subs nothing dimmed. Now almost everything dims when I turn it up.

I'm still trying to decide 140 or 160 amp.

I got my 140 amp for $120 bux or so, AC reman. 160 will have to come from Mr Alternator (where some members have them from).

I would say that go with the AC Delco 140 with a lifetime warrenty, not sure on the warrenty on the Mr. Alternator