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  1. st35326

    Leaf / leafmotor / leafbike high efficiency 1500w motor

    Good little medium sized hub motors but he fact that Greif-Motor charges you $125 for shipping and then adds a service charge is blatant thievery if you ask me,
  2. st35326

    E-S Stealth Electric Bike Owners

    It's been awhile but just wanted to post up that I found B-52 #273 at a yard sale in SF two weeks ago. I was told by the sister of the original owner that he (Steven), really loved that bike but had passed away unfortunately while at an amusement park. I promised I would honor her brothers...
  3. st35326

    E-S Stealth Electric Bike Owners

    21s x5p they way to go for my money.
  4. st35326

    E-S Stealth Electric Bike Owners

    If I was your son I'd off both of those things and buy a Model S Plaid. In a bone stock car Jay Leno just laid down a quarter mile run of 9.23 155mph at Fomosa Raceway. https://www.thedrive.com/news/40921/jay-leno-confirms-tesla-model-s-plaid-set-a-production-car-quarter-mile-record
  5. st35326

    First Battery Build 21700 Molicel P42A

    I had that same one. Grab 3-5 volts off the first series group and run either the positive or negative to a momentary switch. press for 2 seconds (beep) should wake up the Bluetooth in the BMS. Holding for 5 seconds (beep) will depower the charge and output leads. Essentially putting the BMS...
  6. st35326

    First Battery Build 21700 Molicel P42A

    For B+ and B- Ive welded to the nickel strip then soldered the wire on as well as welding a 3rd layer of nickel then soldering. Both worked fine. If it's a really high output pack I'll lay down copper strip on main B+ or B- with my Miller Dynasty 210 Tig set to single pulse with no background...
  7. st35326

    Wire bonding for high powered packs?

    Here's the one I use. Around $75k and works very well. https://www.youtube.com/watch?v=2l4rB4igFG4
  8. st35326

    Sabvoton 72v running on 12s

    Yes every bump in batt voltage equals more top speed. Ive never been in "limp mode" but the 72150 does limit cold throttle application for the first minute or so of riding as well as the initial throttle application ramp to limit front wheel lift. I run 80-100 battery and 300 phase amps set in...
  9. st35326

    Sabvoton 72v running on 12s

    Ive run 20, 21 and 22s through the 72150 and the mid range torque is pretty incredible. assuming your running 2x6s packs in series? Why not add another 6s series group for 18s? I bet on full charge 75V it'll rip.
  10. st35326

    jonescg's cylindrical cell build thread

    13s modules with various size P groups?
  11. st35326

    "Copper/nickel sandwich" buses for series connections

    Wow this thread is a potential game changer. I have some nickel coated copper strip but the Kweld doesn't seem to weld it. So the two strips need to start life as different pieces correct? People have had luck with .10 Copper and .15 nickel with Weld set to 50 joules?
  12. st35326

    Why no 240v off grid?

    Yep Im running the EVTV 240v 6kW inverter hooked to some Tesla Model S modules, charged daily by a few kilowatts of solar.
  13. st35326

    Surron Motor tuning with datalogs! FOC experts needed

    I believe the drop off is from back EMF countering pack voltage. I've found the easiest way to tune, if your interested in performance, is to run from a stop to full throttle 0-30mph, 0-40mph and 100 meter elapsed time via the Dragy. What I do is make a change, then go out and log all three in...
  14. st35326

    Best power to weight hub motor..?

    T-Motor is who you are looking for. http://uav-en.tmotor.com I am not currently sponsored by T-Motor, nor use their products at tier 1 MultiGP races. Although they likely make the highest precision propulsion units for quadcopter of virtually any size.
  15. st35326

    Lion Smart BMS any similar solution an market?

    You want to use can bus on a bike? Ive had good luck with the 300 amp ANT bluetooth bms. But it is Chinese.
  16. st35326

    LMX BIKE in distress: crack on the main frame

    Gross. I'd part ways with that frame ASAP.
  17. st35326

    E-S Stealth Electric Bike Owners

    For anyone reading this and thinking "oh dang, I better hurry up and get muh Chinese battery on order...." Stop. If you are reading this it's likely that your bike requires at least 72v 80 amp output battery which requires different design diligence, than say a 48v 20 amp battery. First and...
  18. st35326

    15S1P configuration.

    Is this a skateboard or some other space constraints that limits the P-group to 1?
  19. st35326

    E-S Stealth Electric Bike Owners

    For Sure :thumb: The Bomber still does 80% of all my around town joy riding for this very reason. Pedals are a factor.
  20. st35326

    Looking for BMS suggestions

    Did you get the module here : http://edisonmotors.net/shop/product/12s-converted-model-s-module-5-4-kwh-50-4-v-max-140?category=7 Cool project. I was actually considering doing this as well but running the Ant Bluetooth BMS so I can monitor cell groups on the fly. I just built an Ebike pack...
  21. st35326

    E-S Stealth Electric Bike Owners

    Looks like we've got a little ways to go to catch up with ICE bikes though. https://www.michigan.gov/documents/msp/Motorcycle_Top_Speed__Acceleration_Preliminary_Results_537497_7.pdf
  22. st35326

    E-S Stealth Electric Bike Owners

    Well since I have the testing data to prove it, I can absolutely confirm that more amps especially PHASE AMPS (up to saturation) = a faster accelerating Bomber #305. I have two Bombers in the garage right now and the modified one wins by about 15 bike lengths in 100m. Dragy runs were...
  23. st35326

    2cycle to electric conversion

    This is a great story and needs to have a dedicated thread, didn't they refuse to award a trophy to an electric? I was on the other side of this back in 2013 with a friend who had built what we all deemed was going to be a sure winner gas bike. Boy were we wrong, I was converted from that...
  24. st35326

    E-S Stealth Electric Bike Owners

    Are they? I have no frame of reference because nobody seems to use such short distances for a performance metric :lol: TV phase amps are like the cocaine of Ebikes. They are addictive and will surely be the reason for my packs early demise! :twisted: Some good reading in this thread...
  25. st35326

    A reminder to be careful

    Chinese battery explodes in a Chinese house. In most Chinese neighborhoods it a bad omen if you don't have a lithium fire very often.
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