Kokam 3200 SHD Lipo
 

I was wondering if anyone has tried the new Kokam 3200 SHD lipo batteries yet. They seem to be very promising, with a 30c discharge rate (64 amps continuous) and should fit reasonably well, too (2s or 3s are a touch shorter than a six cell pack). I have been considering these in my truggy conversion. I can get these from one of my distributors (not cheap) and will likely try them soon. Anyone try them yet? anyone interested?

I'm interested - How much for a 4s pack?

I haven't tried them but was just checking them out the other day (towers site) when I was making a purchase. 20c sounds nice. I would try them if i didn't already have so many batteries already (6 lipos for 1/10th scale and 2 for my rc18t) not to mention the gp packs.

I just checked Tower. I can't match their price. I guess I have to talk to my distributor about a lower price or find another source. The 4s pack will cost me almost $200 shipped (can do better at Tower myself).

Just got two of the 3s 3200 packs. Sorry Mike - I got them from Tower for lower than my 3s 3100 12 C polyquest packs!!!! They had this 30 dollar discount on 199.99 or something so I had to try them. Based on numbers, they're slightly larger than the Polyquest. The Polyquest are at 7.5 oz per pack while the Kokam is at 10 oz per pack (more in comparison to 14.8 volt 3100 polyquest) so energy density is LOWER than polyquest, but discharge rate is higher. Will have to see it in my emaxx with eagle tree to see the voltage drop under discharge...

I'll be using 6s 3200 in my Emaxx... or try that 12000 kv Motor again in my TC4. Last time I used the 1515 5 turn with 11.1 volts, it was pulling over 100 amps and voltage drop was down to 5.0 volts!!!!!

I just picked them up at Tower myself (better deal than I could get through my dealer). I did it the same way you did. I got two of the 2s and just ordered 2 of the 3s packs (were out of stock when I ordered the 2s packs). They are about 1/2 the weight of a regular nimh pack. I haven't tried them yet and would be very interested in your eagletree results. I am thinking of an 18.5 volt setup in the e-maxx and possibly the HB Lightning conversion. Please post your test results here.

i was thinking about trying 18.5volts since i wanted a little more while the novak hv was in the truck (novak actually ran on 16 cells). Since dropping in the 8l i dont really think i will need anymore power then the 14.8 lipos have. Anyways looking forward to seeing how the cells work out since they seem to be a pretty good deal after there coupon codes.

Mike, when I get the batts, what setup do you want me to test? My motors are the Basic 2100, xl1600, Feigao 10L, basic 2700. I'll have to test at 22.2 volts though. In addition, what gear ratio are you looking at? I was thinking of just keeping it at 18/66 (stock ratios) for now.

Young, I was thinking of running the basic 2700 or xl3100 motor. You have the 2700, so lets start there. I ordered 2 2s packs and 2 3s packs, so I have some options. 22.2 volts will over rev the 3100 anyway. I would be interested in the 2700 in first gear with the stock gearing (2nd gear would be too fast for my needs- likely 50+mph even with the voltage drop) as well as a 19 or 20 tooth pinion. I usually gear to reach mid 30s for track racing and would be interested to know what these batteries can take and what kind of draw this speed/gearing yields. The 2100 with 15/66 gearing in second gear is close to what I am looking for as well. What the hell, try them all! I am interested in the 10L for the truggy (although 22.2 volts puts it at or over the rated 50000 rpm limit). I got the 2s packs already and may try them with an xl3100 this weekend (in series). Thanks in advance! I am looking forward to this information!

I think the xl2000 may be the perfect motor for 22.2 volts (or basic 2100). It has enough voltage to keep amp draw in check and enough rpms (mid 40k range) to get some speed without over revving the motors. They say curiousity killed the cat. Well, its a good thing cats have 9 lives! I am very curious!

Actually, I can tell you that the 2700 geared 18/66 with stock tires and 22.2 volts 3100 polyquest gets to about 33 mph in first gear. In first gear, the amp spike is at about 65 amps and voltage drop is about 18 volts - that's for a REAL short time though. In second gear, the voltage spike goes to 15 volts and amp spikes to 90 amps. I would say that any 6s brushless lipo setup with gearing set for low to mid 30's will only draw about 70 amps peak - so getting a slower motor geared taller, or faster motor geared shorter will all yield about 60-80 amp peaks. The Kokam can do 60 amps continuous so I believe with the Kokams, you'll be well under the limits of that battery pack. I'll post a graph soon - the first 4 big peaks are in first gear and the second two big peaks are at second gear.

I wonder how well the voltage holds up on the kokams compared to the 3100 PQ packs you tried. They should hold up a bit better and possibly yield more power. Maybe less amps, too. I am guessing you will get an extra mph or so out of the 20c kokams.

Oh, here's the graph.

The 3200 kokams could likely handle the 90 amp spikes without much trouble, too. What speed did she peak at in second gear? upper 40s would be my guess.

Actually, never got a good shot at measuring - the ONE attempt I had got 46.5 mph in second gear. One thing to keep in mind is that it's very difficult to control. Even in second gear, I have to accelerate slowly and smoothly or else it'll do back flips all day long. The Basic 2700 has GOBS of torque when it's pulling over 1200 watts!