Lipo for e-maxx

[sracingcells]

Would 2 of these work for my emaxx with 9918/8L combo? Thanks

https://www.fmadirect.com/site/fma.h...roducts&cat=32

One on the bottom 2p2s

[starscream]

They would work but I don't believe you will be able to utilize the voltage cuttoff for both packs because of the way the wiring is configured (the receiver plugs into the battery and the battery plugs into the esc. So you wouldn't be able to the receiver into both packs successfully.

However, I've never used them but it seems that you could get two Balance Pro 3200 R/C Aircraft Packs ($153 each) and run them in series through the FMA Direct Automatic Cell Detect, Low Voltage Cutoff Device ($20). You'd also need the 2s Balance Pro charger. I believe these are the same batteries as the scorpians they just don't have the voltage cutoff built-in to the pack.
This would probably be one bad @$$ setup.

I'm going to wait for the FMA 6s packs and charger to come out.

[sracingcells]

how long should they run?

[starscream]

The 3200 Lipo's should have about the same runtime as gp3300's.

The 8L is 3000kv so I'd guestimate the runtime around 15 minutes.

What runtimes are you getting currently and with what?

[sracingcells]

Around 10 to 15 minutes with gp3300's depending on how I drive. What would be the cheapest lipo solution to get 20+ out of it?

[starscream]

I have not had any experience with Lipo batts yet so I am only speaking from things I've read etc. Mike would be the one to ask to get you info on Lipo details.

It doesn't seem that any Lipo setups are going to be cheap. To run Lipo's in your emaxx, you're going to want a high discharge battery so Thunder power pro lite's and FMA kokams seem to be the top dogs so far. FMA gets the nod from me because of the super high discharge and the safety features available with the new technology. You will need 6400 mAh to guarantee the 20+ minutes runtime. Two 6400mAh Kokams are $285 each plus $110 for the charger. Unfortunately you will only be able to charge one pack at a time, unless you spend another $110 for a second charger (although they do boast it charges the batts 90% in 20 minutes). Thunder power also has a setup that would work for you. The TP6000-2S3P look like they run around $150 each plus around $120 for a decent charger.

If you want a longer runtime, you should run a higher voltage system like 18-20+ cells. The higher voltage systems are more efficient so they get longer run times.

[supermaxx4190]

i was thinking about buliding some lipo packs a while back. there were some single cells on ebay for a resonable price. I could have built 2 12,000mah packs for around $250, but lipo is too dangerous IMO to be building yourself. I may look into the kokam packs that mike runs, but im looking for something over 4000mah. anyone got any ideas?

[lipomax]

Yeah, the Polyquest 4s 4400 packs are about 190 a pack. If you get two, it's 14.8 volts and 8800 mah. You'll be spending almost 400 bucks on lipo but those packs can deliver the amps and volts to that motor. It's rated at 12C continuous so we're talking about 100 amps continuous. Being 8800 mah, you'll get a lot of runtime too.

[supermaxx4190]

i would need more than 14.8 volts. I would buy one 2 cell pack and one 3 cell pack to run with my 10L. thunder power is a good deal...i could get these packs in 6000 mah for around 350. That way too much for batts if you ask me, i would rather buy a bunch of 3300s.

[RC-Monster Mike]

I have not run the polyquest (lipoomaxx has much more lipo experience than I do, so I trust his judgement on these). They do seem to be a nice option. I use the Kokams because they deliver the most power per ounce (amp draw capabilities). I only race for 5 minutes, so runtime is not my main concern. On my xl2400/5s Kokam setup, I am sure I could easily finish a 10 minute main, though. With 4400s, I would imagine 15 or so minutes would be pretty reasonable to achieve, depending on the track, the truck and the driver! 8800mah and 18.5 volts on a low Kv motor would run for quite a while, but you would need to keep the motor temps in check more and more as you increase runtime.