@Gimpy Pimp: I posted this in layitlow.coms forums awhile back cause someone had a similar thought on caps being crap and to go with a new alternator. This is what I had to say about it.
What if you can’t afford the alternator? I can get a 2 farad cap for 50 bucks. An alternator is not always the best choice. Everyone is different. Just because you feel this is the best choice doesn’t make it right for everyone. In my case my car does not have an option for a higher alternator that I can see. Its 105Amps standard and there is nothing higher. Even if there is they are in the $150.00 price range and then I would have to pay someone to put it in. Labor is about 135 an hour now. Just guessing it’s only an hour which I doubt it is then you’re already in the 200 -300 price range maybe more depending on time. I agree with you that a battery is good option but not if the battery in the car barley fits now. I got a die hard gold not too long ago and works good for me. I also looked into a gel cell and was told it would not fit. There are many factors involved in making the choice to get a cap. Also saying a cap will cause voltage drops to the amp is not entirely true. All you have to do is get a cap that exceeds the voltage running in the car and make sure the amps ESR and ESL (indicates the amount of voltage drop
That occurs when a capacitor is delivering current) values are less than 0.002 ohms. If they are higher than this then yes your statement is true. Which on the market today is allot of the capacitors? Also on the battery an alternator topic, if your system is just shy of having the required power, a cap works perfect to fix this problem. Also helps voltage ripples, minimizing both the dips and the peaks in your systems voltage.