The voltage of the capacitor will not make a difference except if the voltage is too low. Lower voltage spec caps tends to be used only for cost purposes.

HOBBYWING XERUN Black V2 Brushless Motor 60A ESC SL963
 

HOBBYWING XERUN Black V2 Brushless Motor 60A ESC SL963

Does this ESC work with 1S Li-Po?

I want to use a 1S Li-Po in WGT-racing.

If not, any other very cheap ESC I could go for?

Actually just thinking Angelo, the cap is rated 16V but because we have 4 inline, does this mean that it is 4 x 16 = 64V ?? or it does not matter. it is still 16V through? What would happen if we had 5 in a row for example?

No, the capacitors don't have voltage they are just capable of handling a certain voltage and that is whats written on them. A 16volt capacitor charged with 8.4volts will have 8.4volts in it. A 16 volt capacitor with a 24 volts in it will explode or leak a lot of current because it beyond rating. What happens with capacitors in parallel is you increase the capacitance. 4X330uF = 1320uF 2x330uF = 660uF.

If a 10p capacitor(s) exceeds the used voltage, has enough capacity, it will do the job. some are slightly better than others but used for speed controllers you're not going to tell between them. Don't go speeding £10 -£15 on a 50p capacitor.

ok thanks, but they do accumulate some power (volts?) when in use?

Yes but only what's put into them. If you had a 1000v capacitor it might leak a bit of power at 2 cell lipo voltages and be a bit big but it would still do the same job.

Just to add, hobbywings 2 and 4 capacitor modules they do are very good quality and you would struggle to better them. Solid capacitors compared to the electrolytic type last for ages.

Thanks a mil, not trying to change for another type/make of capacitors, but it is true, that we take these little things for granted without knowing how they work and what they do.

So the frequency is more important than the voltage, but too much voltage is of no real use, so if we go up in uF, what would be the advantages? I guess that like everything, there is a maximum that does not need to be going over.

Basically the capacitor acts as a buffer to the FETs on the speed controller. It works a bit like a battery, delivering current in-between the pulses of current from the FETs and takes a lot of load spiking from the FETs. More capacity capacitors (uf) will help with this load but you get to a point were no more capacity is needed. Too smaller capacity you will find a lack of punch, some lack of efficiency and a lot more heat from the speed controller. You may even blow the controller.

Highly recommend getting the 120A 1S controller. It has a built-in Voltage booster/BEC, so you its easier to wire in. Supports turbo/boost etc.

Or, get the Xtreme stock, and use either a booster, or a receiver pack (recommend a booster). More wiring, but the ESC is lighter.


Shawn.

The only reason why i have recommended the original cap is the we have done the testing on higer voltage low esr caps and they have failed.

No just the capacity increasesas andy has stated

120A 1S should have smaller footprint to use it nicely in WGT... I am assembling CRC LE with 120A 1S and have trouble to place nicely ESC and cap... Although there is no placement problems with some smaller ESCs plus booster...

Thank you for all your explanations, I hope this profited other racers than me.
Regards,
Olly

Totally agree, It should fit fine behind the battery though, I got mine to git in my original GenX10 with the 1S batter fully forward, and the ESC at the back of the car (near the motor), the caps are shoe goo'ed along the side of the battery. Let me know if you want pics.

It would be nice if the ESC was lighter too, its pretty heavy unit for 13.5 racing.

Cheers,
Shawn.

Please, if possible post pics. Thank you!

ESC fits right behind battery, but there is no room for receiver. I am thinking about putting ESC behind the battery but at angle. In this manner I can put receiver and cap next to ESC. And if I grind top plate I can have battery connectors near ESC...

Do not want to put anything on side of the battery. My colleague put Tekin ESC on side, got punched in race and broke ESC badly... Other smashed receiver...