Capacitors

[slumpinhonda 10+ year member]

So you don't think the 3v gain I got out of my "little" 1 farad cap was good

I think that if you are dipping to 10.5 with a 1k watts you have something SERIOUSLY wrong for a 1farad cap to make that much difference.....Try putting in a different battery or something.....shit i wasnt dropping that low with a 40.1 on a stock honda battery wired to .33 ohm. 3 40's and 3 Kinetik 2400s i drop to 11.3v Full tilt.

 

[Slim_Shady]

I think that if you are dipping to 10.5 with a 1k watts you have something SERIOUSLY wrong for a 1farad cap to make that much difference.....Try putting in a different battery or something.....shit i wasnt dropping that low with a 40.1 on a stock honda battery wired to .33 ohm. 3 40's and 3 Kinetik 2400s i drop to 11.3v Full tilt.

Dunno. Maybe that PR1.1000 was a current hog?

It is what it is and I had 3 out of 3 good experiences w/ them.

 

[Slim_Shady]

I've read where some people have said they had sucess w/ these 400+ farad caps, and also noted that they are quite a bit smaller than a car battery.

My question is how can 400+ farads be stored in such a small space yet a one farad cap is roughly the same size as a large Monster can..?

This leads me to believe that the whole 1 farad vs. 430 farad storage capacity is misleading.

Can anyone coment on this?

 

[Krazed4Bass 10+ year member]

I've read where some people have said they had sucess w/ these 400+ farad caps, and also noted that they are quite a bit smaller than a car battery.My question is how can 400+ farads be stored in such a small space yet a one farad cap is roughly the same size as a large Monster can..?

This leads me to believe that the whole 1 farad vs. 430 farad storage capacity is misleading.

Can anyone coment on this?

They have different material inside them.

http://www.mouser.com/Search/ProductDetail.aspx?qs=jDPlySmby27RraFMJRB5vw%3d%3d

http://www.mouser.com/Search/ProductDetail.aspx?qs=wuXwK9wHm9uLiI8cHCuFgQ%3d%3d

By the size of these, I can see how 400+ farads could be made in that small space.

 

[Slim_Shady]

Yeah 150 farads for 25 bucks...Something isn't adding up.

I'm just trying to clear the air about the capacitor issue.

There are a couple things I don't understand.

1. How there are so many manufacturers making these things if they aren't worth the money.

2. How a 150 farad cap can be had for $25 bux, but a 1 farad high end cap used in car audio retails for upward of $200 dollars. I mean, how many products are that highly overpriced and continue to sell?

 

[Linkz 10+ year member]

Yeah 150 farads for 25 bucks...Something isn't adding up.
I'm just trying to clear the air about the capacitor issue.

There are a couple things I don't understand.

1. How there are so many manufacturers making these things if they aren't worth the money.

2. How a 150 farad cap can be had for $25 bux, but a 1 farad high end cap used in car audio retails for upward of $200 dollars. I mean, how many products are that highly overpriced and continue to sell?

You are corect. That 1st cap is only rated to 2.5volts. You need around 20-30v to be safe.

 

[Slim_Shady]

You are corect. That 1st cap is only rated to 2.5volts. You need around 20-30v to be safe.

Yes.

Seems like there is more to caps than the farad rating. People are going by the capacitance value alone

Another misconception is that they discharge all of their energy in 1/ 12000 of a second. Although this is true with some types, it appears the larger ones that are used in car audio discharge at a much slower rate.

Also the way I understand it after a little research is that it also appears that while the capacitor is discharging, the battery is charging, and vice versa. This is where people twist things around and say that all a cap does is "smooth out" the voltage...When in fact it does exactly that, only the "smooth" voltage is at a higher peak, due to the fact that the capacitor and the battery each get a recovery cycle in which to recharge.

Someone please correct me if I'm wrong.

 

[JimJ 5,000+ posts]

This whole "capacitors don't work" thing needs to die, it's confusing too many people and letting this myth continue.

The point is about whether or not a small capacitor used for "power stiffening" purposes in a 12V electrical system is worthwhile or not. Let's be very specific about that. Anyone saying "capacitors don't work" is electrically clueless. Capacitor banks suitable for industrial or research use have been around for a while, and will continue to be...applications such as magnetizers or plasma generators require a lot of capacitance.

The reason you see the price differences is simple, it's the market where they're targeted - I can go to a surplus electronics swap meet and pick up a 1F electrolytic for ten bucks, but Rockford Fosgate is out to make a profit off these things, so they get packaged in a more presentable wrap and marked up.

 

[SPLluminator 10+ year member]

If it wasn't for that big *** in your avy I'd ask you to stop posting lol

Thanks, yea, vida guerra is fvcking hot

 

[Slim_Shady]

This whole "capacitors don't work" thing needs to die, it's confusing too many people and letting this myth continue.
The point is about whether or not a small capacitor used for "power stiffening" purposes in a 12V electrical system is worthwhile or not. Let's be very specific about that. Anyone saying "capacitors don't work" is electrically clueless. Capacitor banks suitable for industrial or research use have been around for a while, and will continue to be...applications such as magnetizers or plasma generators require a lot of capacitance.

The reason you see the price differences is simple, it's the market where they're targeted - I can go to a surplus electronics swap meet and pick up a 1F electrolytic for ten bucks, but Rockford Fosgate is out to make a profit off these things, so they get packaged in a more presentable wrap and marked up.

Thank you.

The poll results clearly show that the vast majority of people that don't believe in capacitors-are people that have never tried one, and basically say they don't work to be like everyone else.

How's that saying go...Ignorance is bliss...This forum must have some of the jolliest people in the internet.

 

[TurdFergueson2 5,000+ posts]

So you don't think the 3v gain I got out of my "little" 1 farad cap was good

So with the car running on your power, you should be around 13. You're saying that you went up to 16?

 

[Slim_Shady]

So with the car running on your power, you should be around 13. You're saying that you went up to 16?

?...

 

[TurdFergueson2 5,000+ posts]

?...

You said you went up 3 volts using a cap. Where was your voltage before? Should have at least been at 12.

 

[Slim_Shady]

No no no.

I know you have a brain. Use it.

Without the cap, at full tilt, my voltage was dropping to 10.5v.

Add the cap, voltage dropped no lower than about 13.5.

That gave me 3 additional volts to feed my amp.

 

[JimJ 5,000+ posts]

Thank you.The poll results clearly show that the vast majority of people that don't believe in capacitors-are people that have never tried one, and basically say they don't work to be like everyone else.

How's that saying go...Ignorance is bliss...This forum must have some of the jolliest people in the internet.

That wasn't exactly my point //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I wouldn't use a 1-2 farad capacitor in a "stiffening" application, either.