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  1. ronnbot

    Just dropped my voltage, what will I notice?

    Slower acceleration and lower top speed. Range should roughly stay the same. I've dropped mine from 16s to 11s and tried any voltage in between but 13s. In my case, top speed went from 50kph to 38kph but big difference is felt when going up hills. As for range, it still does 30km easily as...
  2. ronnbot

    Your favorite Kit

    9C (72V) kit with the cool Cycle Analyst for me from ebikes.ca. As for batteries, got 8x 4S 5Ah hardpacks from HK. I'm an e-bike noob (but not new to brushless systems and lipos) so I found the CA to be really useful. Also, I liked dealing with a local supplier (ebikes.ca physical store is a few...
  3. ronnbot

    Launch Control

    Cycle Analyst V3 can do this though I haven't used it yet. I suppose I should start using it as it both safer and makes it easier on components. I really like this feature on my RC speed controllers (punch control and start power):
  4. ronnbot

    Local laws limiting power and speed

    Same. My commute is 30km (each way) through the greater Vancouver area and I've have no problems, not that I excessively speed or anything. It would be challenging to enforce these laws especially with stealthy e-bikes and the fact that it's not hard for a typical cyclist to exceed 32km/h (I can...
  5. ronnbot

    Modern boardtrack-inspired cruiser build

    Gorgeous bike! This will be a nice conversion indeed. LiPo would be the way to go because they're lighter/smaller, more flexible and typically cheaper. For your commute, I think 15Ah would suffice. To get 72V, you'd need 18S. So, you could get 6x 6S 8000mAh wired as 18S2P which will have a...
  6. ronnbot

    Building a beach cruiser/ board track bike

    That would be how you would wire to get 18S if you pretend each of those bricks is a 6S. If each of those bricks is a 8000mAh, you just need to duplicate it one more time so you can double your capacity to 16000mAh. Once you have two sets, wire them together in parallel using one of these: You...
  7. ronnbot

    WOW! Brain overload.

    No you don't need adapter at all, but you can buy them to make the harness. Here's what I mean (using Deans): Anyway, that's just another option to wire the packs.
  8. ronnbot

    Building a beach cruiser/ board track bike

    72v 15ah is definitely the minimum you need to get what you want or very close to it. Battery is always the tricky part. If it was me, I'd assemble 18S 15A LiPO battery from 9x 6S 5000mAh 20C packs or 6x 6S 8000mAh 30C pacs, with the later being a bit more expensive and simpler but either will...
  9. ronnbot

    WOW! Brain overload.

    Indeed very simple, and can be accomplished by using 1 series adapter + 2 parallel adapter.
  10. ronnbot

    My first conversion: Jamis X2

    The bike is reaching 3000km and it's been mostly problem free. I've done some work on the bike and here's how it looks now: Basically, I moved the CA, re-routed wires, installed a suspension seat post, added a better stand and light, and replaced the tires/fenders. Also, I'm currently running...
  11. ronnbot

    My first conversion: Jamis X2

    Last week, took the bike to work after being in storage since Oct. The motor wasn't as smooth as before so cracked it open: Living in the Northwest, should've expected this. So I cleaned it up: Also sprayed this after. Maybe it'll help?
  12. ronnbot

    WOW! Brain overload.

    12s2p (10 ah) is a good choice. I started with a 12s2p and that was enough for my commute, which is 30km each way (60km round trip) with quite a bit of elevation changes and charging the batteries before/after each way. Also, I'm heavier and my bike is too probably. So, charging once for your...
  13. ronnbot

    How does your ebike weight?

    Bike (with rack, etc.) before conversion - 15.6kg/34.3lbs eBike (9C 2808, Infenion 72V ESC, CAv3) - 24.5kg/53.9lbs eBike with battery (14s 10Ah LiPos) - 27.5kg/60.6lbs +me - 111.3kg/244.9lbs Relatively heavy hardtail to start with but I like how it turned out. My commute (each way) is 30km...
  14. ronnbot

    My first conversion: Jamis X2

    ESC and LiPos in pannier Moved ESC under the rack for better air cooling. Busy handle bar Result of my ride home today. For comparison, it takes me about 40-45 mins by car with typical rush hour traffic. The bus/train would take longer. The other side of the pannier stores the charger...
  15. ronnbot

    My first conversion: Jamis X2

    Finished the bike last week. It would've been done sooner if the batteries didn't take too long. Also, business trips, moving and 1 month long vacation hindered it a bit. Anyway, here it is... Didn't initially plan on putting the battery and ESC in the pannier but couldn't find a triangle bag...
  16. ronnbot

    Your Creation's Before & After Pics

    bike - Jamis X2 2011 motor - 9C 2808 ESC - Infineon sensor/sensorless battery - 12S-15S 10Ah LiPo computer - CAv3 The battery and ESC are inside the MEC Audax Roll‑Up 28L Pannier
  17. ronnbot

    Which motor do i need for 30-40 km/h?

    30-40kph is a big range. Try this simulator: http://www.ebikes.ca/simulator/ With a 9C 2807 motor at 350W power from the battery, you can barely reach 30kph without pedalling provided that you and the bike weigh 200kg and the road is flat. To get to 40kph without pedalling, you'll need double...
  18. ronnbot

    My first conversion: Jamis X2

    Finally got around to making most of the soldering job done. I made the harness to be able to series 4 packs. Then got 4 parallel adapters. I made a shorting plug since I'll be only using 3 of the 4 slots of the harness. Will get 2 more packs later to add the 6. The harness with the plug...
  19. ronnbot

    Charging 44v 10ah lipo pack? 4x 22.2v HK batts

    True enough. Besides, the OP's charger probably can't charge a 6S at high enough current via the balance taps only to be an issue. A moot point on my part. At any rate, cajunjay doesn't need to buy an expensive charger to charge all 4 6s pack at once. All he needs to do is buy a balance board...
  20. ronnbot

    My first conversion: Jamis X2

    Thanks dogman for the reply. The bike was from craiglist but I saw the 2013 at a local store for $499 and 350 for the 2012. I was able to inspect the rear dropouts of the bike by looking at the newer version at the store. I agree with you that mounting the motor would be easy as pie. Actually...
  21. ronnbot

    Charging 44v 10ah lipo pack? 4x 22.2v HK batts

    Those seem like parallel boards for balance taps only. Its not ideal to charger through the balance taps only as you shouldn't run high current through those taps - around 1-2A only. Its better to balance charge with both main discharge leads and balance taps from the battery pack connected.
  22. ronnbot

    Charging 44v 10ah lipo pack? 4x 22.2v HK batts

    The cheapest way to charge all 4 is to use a balance board: http://hobbyking.com/hobbyking/store/__24230__Parallel_charging_Board_for_6_packs_2_6S_T_Connector_.html HK has other versions so get the one that matches your connectors. I have one of these to balance charge 6 x 4s lipos at once.
  23. ronnbot

    My first conversion: Jamis X2

    Based on ebikes.ca's simulator, it should hit 30km/h at around 57% throttle and reach 46km/h @ WOT. Anyone used their simulator and find it accurate?
  24. ronnbot

    My first conversion: Jamis X2

    Hi, it's my first post (but been on these forum a lot) and I'm about to convert a cheap mtb to an ebike. Got pretty much all the major parts and would greatly appreciate some suggestions on how to mount all the electronics and even some critiques on my component choices. The bike is a Jamis...
  25. ronnbot

    Anyone else accidently/stupidly shorting their connectors?

    First thing I do when I receive a battery pack from HK is cut those HXT connectors off and replace it with Deans/T-connector. I've been using Deans for a decade since I moved from Tamiya plugs on my RC stuff. Actually, I've been thinking of changing to EC5 or XT90 for a while now mainly for...
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