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Which Lipo Will Fit?

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Ericke1 said:
Is there any reason I can't use my Superbrain with like an electric fly balancer from Tower for a 6000 or 8000 HV pack? If I buy this Hyperio, power supply the cost of my erevo would go through the roof

Here is the balancer-assuming I need the adaptors?

http://www3.towerhobbies.com/cgi-bin/wti0001p?&W=000553681&I=LXMGS7&P=K
Click to expand...

That balancer will work with any lipo charger. You'll need to specify having the equinox balancing taps asembled with your pack when you order from Maxamps.
 
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CharliesTheMan said:
How does it run without the ESC's being synched?
Click to expand...

That is my question also. The set-up will run poorly if at all if both motors were controlled by a single ESC. Even if each motor has its own ESC, and had their own pack, the voltage differences and throttle positions would be near impossible to keep in sync. I'm no crawler expert, but there are folks who have this type of set-up on their crawlers but those motors move much slower and are geared much lower and are on separate axles. On a monster truck with motors moving one spur I would expect to have each motor spinning 30K+ rpms. If one motor was running slightly faster than the other due to voltage and throttle differences, the slower motor's ESC should fry itself trying to maintain a constant rpm.

If tmaxxbeatings09 has run this successfully I want to see how it is wired.
 
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Yes I see super crawlers a good bit with a similar setup, but they are on seperate axles and unsensored motors. They are run together sometimes, but sometimes one axle will be pulling and one axle will be locked (dig) so they have to be controlled seperate. But like SD said, these are moving at slow speeds with unsensored motors usually. And also, sometimes the ESC's are wired into each other some how so that they run in unison, but I don't know how they wire them like that. Brushlesboy has been doing research on how to wire to VXL's together so they will run in unison without throwin each others sensors off, but there's still work to be done which is why he isn't running the setup yet. I would love to hear how yours runs, and how it's holding up after it's had 10 or 12 packs run through it.
 
One hobbyist suggested this setup to me:

For something exciting but risky (I have not tried it) -
1. Run a two motor system with a pair of EZ-RUN Brushless ESC 60A w/ Reverse programm.
2. Matched with two of these: KD36-50-06S 5900kv Brushless Inrunner Motors
3. Use two 3s lipos - ZIPPY-K 4300mAh 2S1P 20-30C

You will have to clip the BEC wire for both ESC's and run a separate receiver pack. You also need a Y connector to run both ESC's in parallel.
 
I'm just running both speed controls off a Y conecter into the reciver and two 4600 batts. It seems to be working fine. Any ideas on a way to make it better I'm open to hear.
 
Are you running one 4600mah nimh pack on each VXL? How many packs have you been run through them? Can you take a picture of your set-up?
 
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I just spoke to a buddy of mine and he has confirmed that there are quite a few people who have twin VXL set-ups on their e-revos and e-maxxes. What strikes me as odd though is that all of these folks are running at least 3S lipos and a parallel harness. If my math is right, your current set-up with single nimh packs running to each esc should be slower than stock.
 
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The stock Titan 550 motors turn approx. 31K rpms with 14-16 volts. The VXL motor is rated at 3500Kv, which will turn approx. 25K rpms with a 7.2 volt pack.
 
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will a 3cell 4800 be ok to run on this speed control???
 
Sweetdiesel. I think I can answer why it doesn't seem to run slower than stock...
Traxxas LIE. The rating on the VXL system is 3500kv, as you said but with all my setups I have done comparison runs with same model cars, tyre size, gearing, identical batteries etc where the only discrepancy can really be the actual amperage stored in the battery, and I believe the VXL actually pulls closer to 5000-5400kv. That might sound silly but I am convinced.
I have been told that the speed controllers can be synched the same as the Tamiya setup, (the same as the crawlers and Clods) but my I havent done it yet because I have the same concern as you. Whats fine at crawler speeds might be a little unstable at 50 000rpm. Still looking and would also like to see pics of the wiring.
 

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