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  1. Braddudya

    Free Daymak Beast - Going to max this "Beast" out

    I got this Daymak Beast for free. It has the 60v lead acid and some genius zip tied a 60v lithium ion battery under the seat as well. I'm am guessing the SLA battery is dead so they just added another lithium battery and kept lugging around all the lead haha. The wheel motor says "500w" which...
  2. Braddudya

    Gas Generator Hybrid Conversion

    I am building an art car for burning man. The vehicle is a 20ft long "sightseeing tour bus" (2015 Marshell DN-23). It would be great to be EV all the time but I am thinking we may need an onboard generator to be able to cruise around most of the day. What considerations do I need to consider...
  3. Braddudya

    Grade B Cells

    In real world terms can any explain what a "grade b" cell means? I understand that these cells are not a good choice if you are going to try to push their amp draw limit but for mild, let's say 1/2C use, what will be lost with grade B cells? Half the cycle life? More heat? I guess I am just...
  4. Braddudya

    LiFePO4 or Lead Acid for 15 Person Golf Cart for Burning Man

    I bought 6 15 person golf carts that we are going to refurb and possibly rent out to events. Some of these carts will also be turned into mutant vehicle art cars for burning man. These vehicles already have all of the parts to function as lead acid. For burning man you can't drive over 5mph so...
  5. Braddudya

    Is the site down for everyone? I cannot open any threads

    is it down for everyone else?
  6. Braddudya

    Budget Motors - MY1020 Upgrade

    I know everyone loves the QS 138 motors and the ME series motors as well as the golden motor 5-10kW but the prices for all the models I am aware of are $500+. I have a budget Pitbike build I am working on and I chose a "3kW" my1020 only because it seemed like the only option under $200 that...
  7. Braddudya

    Kelly KLS-N vs KLS-S

    I am looking to upgrade a controller for a 3-5kW pitbike project. Kelly has a good reputation and seem quite usable as well as affordable. I am leaning toward the sinusoidal controllers as they promise to run smoother and are similarly priced. I'm looking at the KLS-N 72V 80A continuous $129...
  8. Braddudya

    Stuttering Pulsing On Initial Start

    I have noticed this on one of my fat tire ebikes as well as my just finished electric pit bike. What can be done to prevent stuttering on initial takeoff? My diy battery RadRover does this sometimes when I am putting a particularly heavy load on it at startup (full throttle, no pedel, uphill). I...
  9. Braddudya

    My1020 3000W Pitbike - budget build

    I bought a couple of ktm 65sx dirt bikes for next to nothing. I am converting them to electric. One of the bikes is significantly smaller. It's bigger than those Razor toy bikes but it's small even for a Pitbike! For the small bike I don't want to spend tons of money. I picked up one of these...
  10. Braddudya

    Used 12s4p Packs Combined For 12s16p

    I have some 36v LiFePO4 packs that are 12s4p. I am trying to combine them for a solar adventure van project (the van will still be gas). I could add a BMS to each pack and then wire them in parallel with each other. Or I could wire each parallel set together to make one battery with one BMS. Is...
  11. Braddudya

    24V Giant Forklift Battery - Lead Acid Care

    My company just took delivery on a heavily used crown walkie stacker forklift. It has a ridiculously huge 24V lead acid battery. It arrived fairly dead but I have charged it up to fill and it seems to work great and have plenty of capacity for our limited needs. I want this to last AS LONG AS...
  12. Braddudya

    Just Bought a Nissan Leaf With a Pretty Bad Battery

    Just picked up a 2011 Nissan Leaf with 70K for $2700! It's in good shape inside and out and seems very mechanically sound. Only big problem I see is that it only gets about 35 miles per charge. I live very close to where I work so 35 miles will get me to and from work for nearly a week. So it's...
  13. Braddudya

    Updates for the Controller Information Links Sticky?

    The Controller Information Links sticky seems like it was a really great resource in 2013 but a lot has changed! I am currently trying to research controller options and I thought, "Ill just checkout that controller sticky!". Unfortunately I don't see anything about phaserunner, sabvoton...
  14. Braddudya

    True 1500W+ DD Fat Hub With Fast Shipping?

    I have a friend who wants to convert a 26" fat tire to a 1500W rear hub (dropout measure 180mm). The key is he would like it relatively soon. I've been looking at Amazon and eBay but it seems like they are almost all heavily exaggerating the specs. "1500W 48v"...but then "17a controller". I...
  15. Braddudya

    T8F 8mm Chain to Freewheel? Mini Moto Kit on Bike

    How can I go from t8f (8mm) chain to the freewheel on a bike? I bought one of those 72V "3000W" motor kits and I would like to put it on a fat tire bike. I know I need a big rear sprocket but I can't seem to find anyway to adapt a sprocket.
  16. Braddudya

    Embarrassingly Simple questions - Choosing a Voltage

    So I have decent electrical knowledge but I am realizing that I may be thinking about some topics too simply. How does one go about determining the best voltage for a project? Is it simply speed calculations for your motor? Like what voltage is required to attain a certain speed, or avoid the...
  17. Braddudya

    Mystery eBay 48v 40ah Pack

    I got this for free with an abandoned e motorcycle project. Should I run from this thing or use it? I will probably cut it open and see what the cells are and what the construction looks like. I am posting here because I am sure some of you have experience with these.
  18. Braddudya

    Golden Motor 48V vs 72V

    I may be acquiring a Golden Motor 5KW 48V motor. https://goldenmotor.bike/product/48-volt-5kw-bldc-motor-air-cooled/ Is there any difference between the 48V and the 72V variants? They are the same price and I would think that any 48V motor can handle 72V as well just maybe not the additional...
  19. Braddudya

    Running 1000W Controller on 350W Hub

    I have been offered an old Nakto Super Cruiser fat tire 350w. I have gotten accustomed to 750W+ bikes so 350 seems quite boring but I think I can get it for like $50 due to it's condition. If I throw a new battery and a 1000W controller on there what is likely to happen? I know you can over...
  20. Braddudya

    Any 3D Printed Parts Needed? - I Have a Small Print Farm

    Just curious if there are any parts missing in this hobby that can be 3D printed? Backets? Housings? Accessories? I have a small print farm (6 FDM + 3 SLA) and am trying to find some products that I could produce between jobs. I would be happy to solve some problems for builders! :bigthumb:
  21. Braddudya

    Estimating maximum amperage of mystery BMS?

    I just took apart these batteries that are for an aventon Sinch ebike (500w I believe). I am going to harvest the cells and build a 14S 6p pack with them. I was curious though how much the stock BMS can output. Anyway to tell? I tried googling the model number but didn't find anything. I have...
  22. Braddudya

    Aventon Sinch Battery for DIY Ebike

    I bought 2 14ah 48v used packs from jag35. Apparently they contain Samsung 35e 3500mah cells in 13s3p config I believe. https://jag35.com/products/r8-r-series-48v-14ah-672wh-ebike-battery?_pos=1&_sid=a63f43733&_ss=r I was planning to harvest the cells and build a 52V pack. But the batteries...
  23. Braddudya

    Variable Power Supply With OVP as a Charger

    Hello, I want to buy a charger that can be adjusted for different voltages. That way if I decide to increase voltage I can use the same charger. Even more importantly I want to be able to easily charge to lower voltages regularly so I avoid keeping the batteries at max for my daily commute...
  24. Braddudya

    Hardtail EMTB - A Mistake?

    I have a 2012ish Trek/Gary Fischer 29er with hydraulic disk brakes. I bought it new for $900ish (I think) back in the day. Haven't used it much and it's in tip top shape. It's also a 19" down tube so it actually fits me compared to most bikes I have owned. (6'2" - 215lbs) I have been planning...
  25. Braddudya

    How to Build a Safer Battery - Looking to Collect Knowledge

    Been reading all that I can here. I want to build a 52V battery for BBSHD emtb conversion. I have assembled packs before using 60 LG cells for a mobile power station. This was before I could find affordable spot welding equipment so it was the "work as fast as possible with a very hot soldering...
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