Lets talk caps

Im buying a R1PRO for racing, and some of the guys in the HK were saying there putting a 16V2200uf, and got more punch & response


So I was wondering, what cap should I use for racing thats on the small side? I need something pretty darn small, because its in a touring car, so rooms is very limited....

Can you guys help me out here? Or am I just wasting money by buying caps to race with? the speedo comes with a cap, and I will use this with a 10.5, and lipos....

[zeropointbug]

An easy one to find are some low-esr caps on ebay... find some 16v and less than 1000uF, that should be quite small enough.

I can a test to using caps for getting some more punch from your system... check my sig. for a link to pics of my modded Quark with 6 caps on a nice bank soldered directly to the Quark power board. I definitely felt a difference in smoothness, and driving power; it was also much harder to make the system cog as it became apparent when driving up steep embankments/big rocks. And it also ran VERY cool, but maybe, just maybe that was partly because of the massive heatsink (or heat-toilet) attached to the FETs.

I dont really need more punch, I like the punch, but with lipos, my LRP Tc sphere had more punch then I wanted in setting 1 (lowest) But that was because it was so cold out, traction was very low..... Never ran the set up in summer lol....

So punch is really something I dont really want to gain, just as you said the smoothness and less cogging... I have no idea what the stock cap is, but if theres something better out there, I will buy it!

You have a link to the caps?

[GriffinRU]

Originally Posted by BlackedOutREVO

Im buying a R1PRO for racing, and some of the guys in the HK were saying there putting a 16V2200uf, and got more punch & response


So I was wondering, what cap should I use for racing thats on the small side? I need something pretty darn small, because its in a touring car, so rooms is very limited....

Can you guys help me out here? Or am I just wasting money by buying caps to race with? the speedo comes with a cap, and I will use this with a 10.5, and lipos....

How many cell's are you planning to use?

Check this post.

Just 2s

I will go look at the link

[GriffinRU]

Originally Posted by BlackedOutREVO

Just 2s

I will go look at the link

This one would be sufficient.

Finially the dude emailed me back

He said the cap on the LRP Sphere TC is the cap he is using, and since I have a blow TC, shoild I steal its cap? Or would the cap be messed up after it let the smoke out?


Nice price on that cap though to lol... IDK which one to get!

[GriffinRU]

Originally Posted by BlackedOutREVO

Finially the dude emailed me back

He said the cap on the LRP Sphere TC is the cap he is using, and since I have a blow TC, shoild I steal its cap? Or would the cap be messed up after it let the smoke out?


Nice price on that cap though to lol... IDK which one to get!

It is all up to you. New cap is always better.
I would check how much room you have and find a better place for cap with short leads. Then measure available space and pick capacitor from Digikey (from the same FM family) which would fit the best from ~1000uF and up in 16V range, strictly for 2-3S LiPo.

Check datasheet for available sizes.

Well if you know how big the novak cap is

This one

http://www3.towerhobbies.com/cgi-bin...&I=LXMYJ6&P=SM

Thats about as big as I can go

[BP-Revo]

If I were you I would just use a single Novak HV cap. It can handle 25V so you have nothing to worry about, and its 2700uf, so its plenty big.

It is a pretty large cap though, about a 5/8 inch in diameter and a little less than an inch long.