most amps Novak HV esc can handle?

[sadclown]

whats the maximum number of amps i can run through the Novak esc? It says 400 amps on the specs sheet, but it seems very high.

and what about the MMM?

[HoovHartid]

there isnt really a strait answer to your question.
there are spikes that an esc sees for miliseconds that are upwards of 400+amps but neither ESC will sustain that load constantly.

if your just trying to compair between the two, then the MMM will hold a higher sustained amperage than the Novak. I want to say the MMM can hold a sustained amperage of 120A. Not sure what the True sustained amperage of the Novak is.

[sadclown]

well the reason i ask is cuz im looking for batteries to buy and i dont know how many amps is sufficient. for instance, im looking at the true rc 8000mah 2s2p 15c packs that claim 120A continuous and 160A bursts. i guess i want to know if i can go with more amps or if this is already too much?

[GMMWICKED]

Email Novak, just a thought... tech@teamnovak.com

[sadclown]

ok, i just emailed novak and already got a response. here is the response:



A common misconception is that the battery packs “Push the Amps”.

This is not true. The ESC and the Motor “draw” the amps from the pack. The more C rating you have, the easier it is for the ESC and motor to “get” the power they are asking for.

Better C rating means the pack gives up the power easier, and should stay cooler under heavy loads.

From our experience we like to use at “least” 20C battery packs. You will see spikes over 100 amps “all day long” with these systems.

[bmxdude]

so I cant use these batterys on the novak hv 5.5?

http://spcracing.com/index.php?productID=61

[sadclown]

so I cant use these batterys on the novak hv 5.5?

http://spcracing.com/index.php?productID=61

i mean, you can...

hes just recommending to use cells with a higher discharge rate if you wanna unleash every last bit of power

[bmxdude]

but i wont ruin the batterys right?

[sadclown]

i dont think so...

ill ask him...

[bmxdude]

alright thanks!!

[sadclown]

He responded with yes...

So i guess its better to invest in nice packs, or else your esc and motor will demand more than what is available and eventually ruin the cells.

interesting...

[asheck]

C ratings are directly related to the mah.To say 20c is misleading.For Novak I've been fine with anything that does 60 amps.I have talked to Tom from SPC and he runs the 5000 12c with a Novak ,racing Emaxx,and has no problem with them.I have been running SPC 8000's with all my systems ,since they were first released,and they do fine.I would imagine that the Novak 4.5 is less then an 80 amp constant system.

[bmxdude]

ok so is that a yes it'll be fine or yes it'll ruin your batterys?

[fmj40]

What they are saying is that you won't ruin your batts on either of these esc's, what'll happen is that you won't get the punch you'd expect because the batts can't keep up with the load. The lower the c rating, the less amps constant that the batt can deliver. To be honest the novak esc's and motors don't draw as much amps as the Neu systems or the larger ones for that matter so you won't have anything to worry about with 20c packs. Now, if you outgrow that novak and want the Neu, you would have to get higher c packs to keep up...
PS, have you consulted the FAQ concerning battery selection? There is so much info on here for batts its really not funny..

[BrianG]

ok, i just emailed novak and already got a response. here is the response:



A common misconception is that the battery packs “Push the Amps”.

This is not true. The ESC and the Motor “draw” the amps from the pack. The more C rating you have, the easier it is for the ESC and motor to “get” the power they are asking for.

Better C rating means the pack gives up the power easier, and should stay cooler under heavy loads.

From our experience we like to use at “least” 20C battery packs. You will see spikes over 100 amps “all day long” with these systems.

Hmm, sounds like he dodged the question to me. Reading between the lines, I would say he doesn't want to state an actual number but instead points out the misconception of "pushing amps", which is perfectly valid.

From experience, most companies overrate their ESCs, or rate them according to the specs of the individual FETs. Unfortunately, this is not correct since the current rating of a FET is at a certain temperature (usually 25*C) on the FET itself (not on the heatsink). Any temperature above that derates the current rating. When was the last time you read 77*F on an ESC heatsink, let alone on the FET component?

But how should companies rate their products? Company A may optimistically rate using pure datasheet specs and therefore come up with an unrealistic spec for the actual typical operating temperature. Company B has the same type of product but rates it realistically keeping in mind the temps we run things at. As a result, the published spec is lower, but correct/realistic. Sixpack Joe walks into the LHS looking at specs and which do you think he'll choose? Of course, the one with the higher published rating. Same thing happens all the time with audio (especially car audio).

I'm not saying Novak is doing this, so don't get me wrong. And he is right, current specs are over analyzed. If the ESC temps are ok, then you are operating fine for the most part.

[The Oracle]

You're far too polite sometimes man...

I noticed the question dodging too- from reading various forums for many years, and learning from GriffinRU (esc guru), it seems that the novak can only sustain a current of around 60-70 amps before it will thermal. One user with an eagletree reported spikes of 120 amps on his system, but the average current was much lower (Brian has a formular for working out the peak vs constant current I believe- factor of 4 or something like that?).

I think most good to top-end nimhs will be fine with a novak system, but you truelly do need at least low-end lipos to get the full potential from the system- 10c 8000mah packs work remarkably well and give the setup a new found awesomeness over nimh power. Trust me on that one...

[BrianG]

You're far too polite sometimes man...

I prefer the term "diplomatic".

[sadclown]

ok, what about when i switch to the MMM setup?

will the 8000mah 10C 2s2p pack still be ok?

or should i just get the 15C pack?

cuz ill have the MMM setup soon... hopefully...

[The Oracle]

I prefer the term "diplomatic".

Thats the word I wanted to use, but I couldnt remember it, lol.

If you havent bought the lipos yet, then go for the 15c items- they will yield better performance under load and cooler temps during the run. 120amps cont. vs 80amps cont. is always a good thing.

[Revo_Troop]

http://spcracing.com/index.php?productID=81

recently purchased these and have ran these

http://www.maxamps.com/proddetail.ph...O-Pair&cat=172