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-   -   what is this? (https://www.rc-monster.com/forum/showthread.php?t=12376)

Revracer 05.26.2008 06:45 PM

what is this?
 
ok so what is this and is it worth getting? im using a mamba max in a revo and a little more punch could always be used. thanks in advance

http://cgi.ebay.com/Ultra-low-ESR-Hi...QQcmdZViewItem

MetalMan 05.26.2008 07:39 PM

It's a simple capacitor bank, with a huge price. You could buy some capacitors and wire yourself, and make something similar for only $5. It might not end up looking as pretty, but honestly $20 is way too much for something so simple.

lutach 05.26.2008 07:39 PM

Quote:

Originally Posted by Revracer (Post 176837)
ok so what is this and is it worth getting? im using a mamba max in a revo and a little more punch could always be used. thanks in advance

http://cgi.ebay.com/Ultra-low-ESR-Hi...QQcmdZViewItem

They are good. You could make your own as well and save a few bucks. Thos are the same that comes with the Hobbywing, Speed Passion GT and Venom 120A controllers.

Revracer 05.26.2008 07:55 PM

could yall give me some links to everything i would need to make one? would it be worth having if im going to have a mamba max in a revo? thanks again

brushlessboy16 05.26.2008 08:01 PM

if you own some wire, and a soldering iron, all u need is the capacitors,
http://cgi.ebay.com/330uf-100v-Radia...QQcmdZViewItem
i made one, really easy to do...

Revracer 05.26.2008 08:04 PM

how much will it help? if at all. and yeh i have some wire but its 12awg... and where would i attatch it to my esc?

brushlessboy16 05.26.2008 08:20 PM

u can either solder it onto the power leads or do like me, run it inline with deans.

Desmo 05.26.2008 09:09 PM

Quote:

Originally Posted by brushlessboy16 (Post 176863)
u can either solder it onto the power leads or do like me, run it inline with deans.

Do you have pictures?

The caps do need to be as close as posiable to the esc. I have 2 on these on my Novak 4.5 HV set up and it runs cooler than it did on just one.

http://www3.towerhobbies.com/cgi-bin...&I=LXKKN3&P=SM

jhautz 05.26.2008 09:26 PM

Quote:

Originally Posted by lutach (Post 176850)
They are good. You could make your own as well and save a few bucks. Thos are the same that comes with the Hobbywing, Speed Passion GT and Venom 120A controllers.

So you have tried these? What is the voltage on the capacitors? 25V, 35V?

lutach 05.26.2008 09:40 PM

Quote:

Originally Posted by jhautz (Post 176878)
So you have tried these? What is the voltage on the capacitors? 25V, 35V?

No, the actual capacitor that came with my Hobbywing is the old single capacitor that later got replaced by that capacitor bank http://www.hobbywing.com/english/Art...?ArticleID=417. The caps are rated for 16V and it is meant for 11.1 volts which is what Revracer will be using with his MM and Mega. Like I said in my previous post, it will actually be cheaper to make your own. I will be making my own using axial capacitors to have them lay flat instead of making them tall with the radial caps. I'll be using big 1000uF, 50V caps just because I have them here with me.

Revracer 05.27.2008 03:34 PM

so what all would i need? just some caps and wire? if i have a spare 470uf 16v cap(pulled it off an old esc when the esc crapped out. dont know if its still good...) would that be fine? what about the novak mega that is like 8200uf? or the 4700uf one. if i could make one for like $10 or so should i? and what do you mean run it in line with your deans? like solder it onto your battery connector?

Fkyx 05.27.2008 04:14 PM

Inline means solder the appropriate connectors onto it so you can put it between your ESC and battery without replacing the connectors already on the battery and ESC.

http://img129.imageshack.us/img129/3...lineloltg9.jpg

lol

brushlessboy16 05.27.2008 04:18 PM

http://i152.photobucket.com/albums/s...andom009-1.jpg
http://i152.photobucket.com/albums/s...andom008-2.jpg

lutach 05.27.2008 04:27 PM

1 Attachment(s)
Actually all he needs to do is solder the cap leads together and if needed add some 12 or 14GA wire use some shrik wrap and from the caps to the ESC and the battery plugs where it originally goes. Please get a laugh at my crappy drawing.

lutach 05.27.2008 04:27 PM

Yes, great example right there.

Revracer 05.27.2008 04:36 PM

seems simple enough. again what caps should i use to do it and where can i pick some up? i will probably make it like either lutach's or Fkyx's drawings. something easy to remove if i ever want to put it onto a different truck or esc or anything.

brushlessboy16 05.27.2008 04:49 PM

the principal is the same, i just did mine differently, or he can do like the ebay person did and mount it on a board

Revracer 05.27.2008 04:53 PM

i still have not had an answer. what caps should i use? would the really high Uf Novaks be ok? the like 8200 and 4700 ones? that be really simple wouldnt it?

brushlessboy16 05.27.2008 05:05 PM

Yeah Novaks will work, there will just be a big spark when u plug it in to charge the caps

suicideneil 05.27.2008 05:26 PM

Low esr, 25v, 105*C caps- capacity isnt too important so long as there is a fair bit, say between 1000-5000uf in total. I added another 4700uf cap to my hvmaxx and it runs much cooler, and smoother towards the end of the run.

Fkyx 05.27.2008 06:00 PM

If I were to run one of these with the CCBEC, would I throw them inline before or after the BEC going from battery to ESC.

Revracer 05.27.2008 06:04 PM

so adding a 4700 cap to a mamba max will probably be a good idea? just one should be fine? or should i get more smaller ones? and i probably wont be runnign a CCBEC

suicideneil 05.27.2008 06:05 PM

Flyx- Before, if you start at the esc end of things looking at it. The Bec can be wired anywhere on the power wires really, but the caps need to be close to the esc as possible.

suicideneil 05.27.2008 06:06 PM

Quote:

Originally Posted by Revracer (Post 177151)
so adding a 4700 cap to a mamba max will probably be a good idea? just one should be fine? or should i get more smaller ones? and i probably wont be runnign a CCBEC

Just one will be fine- exactly the same as GriffinRU's stage one mod uses.

Revracer 05.27.2008 06:35 PM

and adding 2 will be better or is there a point where you cant get any better? and if i add 2 i will be spending almost as much as that deck....

lutach 05.27.2008 07:42 PM

I'm planning on adding around 4-5 axial 1000uF 50v caps in parallel to give me around 4000-5000uF. It should make a nice little spark, but I'm fine with that. I got used to 10 and 12S sparks.

Revracer 05.27.2008 08:31 PM

spark? so adding a cap or two will make it spark? either way one 4700 will be plenty enough for a MM on 3s lipo?

lutach 05.27.2008 08:34 PM

Quote:

Originally Posted by Revracer (Post 177214)
spark? so adding a cap or two will make it spark? either way one 4700 will be plenty enough for a MM on 3s lipo?

You should be fine with that one big cap.

Revracer 05.27.2008 08:35 PM

alright so less than half the price of the one on ebay for something that will be just as good if not better... will there be a noticeable difference in the truck? or is it something that just kinda helps smooth everything out? worth $10?

lincpimp 05.27.2008 09:10 PM

Should help temps by 10 to 20 deg. I would run a ccbec and disable the mm internal bec. That will drop temps on the esc quite a bit, and is definately worth 20bucks. Plus the ccbec is adjustable via the castle link. Out of the two, the bec will be the better mod for 3s use.


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