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  1. Overclocker

    QS motor shaft wear

    akQ8VDYVp0o so my shaft wear is getting worse over time so i gotta do something about it asap. been mulling over a few options: 1) weld the sprocket :lol: 2) build up the splines w/ MIG. high heat settings and 0.6mm wire should deposit some tiny little drops of weld. shouldn't be too hard...
  2. Overclocker

    20mm thru-axle hub bearings are too weak...

    so my bearings went bad again after just a few months! these are 6805-2rs. 25 x 37 x 7mm. the bearing balls are just too small for heavy-duty ebike applications so now i'm thinking of upgrading these hubs to bigger bearings. 6904 (20 x 37 x 9mm). same 37mm O.D. but 2mm wider so would stick out...
  3. Overclocker

    Is it OK to float-charge a maintenance-free "sealed" car battery

    Is it OK to float-charge a maintenance-free "sealed" car battery lead-acid starter battery. typical 12v found on ICE cars just wondering if a continuous float charge (around 13.5v) is OK to maintain SOC and prevent sulfation
  4. Overclocker

    Kelly KLS throttle release delay

    i'm having this issue w/ my KLS7230S. when you suddenly release the throttle it continues to accelerate for a split second. my "Accel Rls Time" is already set to the lowest value. what other settings can influence this?
  5. Overclocker

    Running a 96v motor (HPM3000B) at 68v

    any downsides? i need a low-kv motor so i can get away w/ using a 1-stage reduction w/o the sprockets getting ridiculously big. the latter detail being important when riding in mud. large sprockets tend to get dipped in mud and cause problems
  6. Overclocker

    Battery box that doesn't trap heat

    we've all seen the typical ebike battery pack. some are even encased in (insulating) foam. heat gets trapped inside. a typical hailong pack doesn't have any effective heat path to the outside air. on the other extreme there's Tesla's liquid cooling. not really viable for ebike packs. so here...
  7. Overclocker

    A123 26650 low-resistance connections

    i built this jump starter pack last year. basically i spot-welded nickel strips then soldered 10ga copper wire on top. but is there a better way? this pack works btw, has saved my ass already that one time at the airport. i'm just asking because i need to build another one, hopefully w/ lower...
  8. Overclocker

    Non-overclocked Vector Light Build

    as the title suggests this will be a somewhat "low" power build but i'll still try to maximize the thermal capacity of the hub motor which would be the QS 205 35H 5T winding https://www.aliexpress.com/item/32816512376.html inspired by skeetab's build w/ the funny frame color :lol: also...
  9. Overclocker

    Active Balancer from IC gogogo

    https://www.aliexpress.com/item/32982883973.html anyone tried this yet?
  10. Overclocker

    Denzel D9000 motor any thoughts?

    http://www.eastgem.net/d9000.html seems to be simply a slightly longer version of the D7500 i.e. same diameter but D9000 is 170mm long, D7500 is 127mm any thoughts?
  11. Overclocker

    Suzuki kei truck at 50kph flat ground

    660cc engine (to be removed) 700kg (ish) curb weight i just need it to cruise at 50kph on flat roads. what's the smallest motor that could do this? a golden motor 5000w watercooled would do it?
  12. Overclocker

    Tata Nano, two small motors on a single shaft

    ETxw6cO6-k8 this guy put two small motors, kinda like the BHT i'm using or probably slightly bigger, on a single shaft to drive the "world's cheapest car" (600-ish kg curb weight WITH engine which he removed) would probably overheat the motors, right? also aren't there synchronization or load...
  13. Overclocker

    Zoom DB-680 dual-actuation mech calipers

    https://www.aliexpress.com/item/ZOOM-Aluminum-Alloy-Bicycle-Rear-Disc-Brake-Black-Mountain-Road-MTB-Bike-Mechanical-Caliper-Disc-Brakes/32841681729.html they're like cheaper TRP Spykes any thoughts?
  14. Overclocker

    MeanWell HLG vs ELG as charger

    ELG-240-54A vs HLG-240H-54A for charging 13s packs 13*4.2 = 54.6 they seem to have the same specs but ELG has the adj pots at the back. HLG has them in front. and their metal cases are different ELG is cheaper any other differences i've missed?
  15. Overclocker

    18650 pack to jump start a small car...

    ford ecosport 1.5 liter gasoline how many amps do i need to start this? i'm thinking Sony VTC5A or the cheaper LG HB6
  16. Overclocker

    6-channel independent charger / pseudo-balancer

    since these cells are a bit older i'm expecting to do a bit more balancing on them. the objective is to be able to simply plug in this gadget into the group that needs balancing. since each channel is independent it'll simply charge its channel up to 4.20v and stop. this is just a prototype so...
  17. Overclocker

    Old salvaged Panasonic NCR18650 still performing like new!

    i just got 4 samples from a local battery "recycler". these are Panasonic NCR18650. the OG NCR 2900mah w/ old-style gray wrapper (dotted) iCharger 2.9A discharge (1C) down to 2.5v one did 2933mah! :shock: the others aren't far behind what's going on? they're supposed to be performing much...
  18. Overclocker

    A sure way to check for fake cells

    Here's a good way to check by matching the discharge curves from here: http://lygte-info.dk/review/batteries2012/Common18650comparator.php Obviously this requires a way to graph the discharge curve of your test cell, in this case the Samsung 30Q. Shown here is the iCharger 106B+ via USB (to...
  19. Overclocker

    Hailong pack build, 13s4p Samsung 30Q

    This is a slim case but I'll be using this pack w/ a 45A controller which needs a bigger BMS than would normally fit. So some surgery is needed. I also decided not to use the 52-cell carrier to create more space Section removed to create a flat surface. That's white PVC bonded to the...
  20. Overclocker

    PPTC self-resetting fuses for the balance wires

    i believe em3ev uses them. we should too. any thoughts on component selection? how fast do they work?
  21. Overclocker

    New Samsung cell 33G

    interesting new cell but i can't find any solid info on this yet...
  22. Overclocker

    LG HG6 20650 cell

  23. Overclocker

    Sanyo GA cells temperature rise during charging

    even when charged at just 1.0A per cell they seem to get noticeably "warmer" than my other cells e.g. Samsung 26F by warmer i mean about ~5 degrees C over ambient my samsungs get only about ~1 degree over ambient, at the same 1.0A charging current anyone noticed this too?
  24. Overclocker

    Lishen 18650 cells and the death of disposables

    the wireless keyboard i'm typing this on requires 2x AA but instead it put in one lifepo4 14500 and a dummy. same w/ most of my AAA remotes, 10440 lifepo4 and a dummy. so we're already there 8)
  25. Overclocker

    Chain wear between BMX chain versus #35 chain

    everything else being equal, same tooth counts, same brand/grade KMC chain, etc to be used on a BHT motor mid-drive which chain is gonna wear out faster? i'm thinking the BMX is gonna wear out faster? coz it's bushingless i.e. smaller bearing surfaces
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