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  1. F

    large road legal electric go kart build. need help!

    torker , thank you! my dad loved the trip, we would both just love if it was a bit quieter, its a work in progress. I will see if i can use my infrared thermometer in a video hillhater:i wish i could read my RPM from the motor i dont really know how to go about that. my gear ratio in the diff i...
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    large road legal electric go kart build. need help!

    sorry ive been gone a few days! ok let me answer these questions as well as i can. latest update: i decided to insulate the rear motor area a bit more for noise. with carpet foam. we shall see tomorrow how it does. also add a VERY high CFM fan to my motor radiator and it seems to be cooling a...
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    large road legal electric go kart build. need help!

    i think i need to learn to be more clear. and understand gearing terms! haha. the buggy is geared low. so the motor has currently a small 10 tooth pinion gear. the input to the differential box has a large gear of 31t . differential gear is welded and cannot be changed. so i was stuck either...
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    large road legal electric go kart build. need help!

    i mean cooler, and keeps the amps lower?
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    large road legal electric go kart build. need help!

    so harder to push actually keeps it cooler? so i should be looking at making it tougher on the motor?
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    large road legal electric go kart build. need help!

    i will see if i can find a jack to get this tested. but yes, now that my gearing is 3:1 vs 2:1 my amps are insanely high, and draw is much more watt hour per mile wise. my question is what could be the issue shouldnt it be that if a vehicle is easier to push then then the amps should be low? it...
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    large road legal electric go kart build. need help!

    so i wasnt so happy with the acceleration even with the 12tooth. . i learned and noticed a feew things tonight. my thought process was , if i drop to a smaller gear i might draw fewer amps. and run the motor and controller cooler. hopefully giving me more range and a more efficient vehicle. i...
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    large road legal electric go kart build. need help!

    also as a further uodate, i insulated the rear hatch with carpet foam pad. and i will soon insulate the the new bottom floor i put in to keep things quieter im hoping that this stuff will quiet down the vehicle and help improve the aero dynamics
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    large road legal electric go kart build. need help!

    the controller i am hoping to get is a 96v controller. but from my understanding a controller basically ramps up the voltage from 0 to 96 to get rpm out of the motor. so if the controller is ramping up the voltage, my question is can i set it to simply stop ramping at around 60v. the controller...
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    large road legal electric go kart build. need help!

    this is what i thought, but i also have to swap the corresponding hall sensors correct? how would i go about doing this?
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    large road legal electric go kart build. need help!

    new update. cant get accurate figures of energy consumption due to wonky BMS. thats in the works. however today i went ahead and started on aero dynamics. it may not seem like much , but i sealed up the complete bottom of the vehicle. which hopefully means less swirling off air in the cabin, and...
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    large road legal electric go kart build. need help!

    SO i tried the new 12 tooth gear. and it has confused me a bit more... it accelerates better for sure. topped ouit on a down hill at 48 mph. vs 51 before, and on a ormal area about 45mph. so this was promising. however the consumption has significantly increased it went from 212-220, to roughly...
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    large road legal electric go kart build. need help!

    another update. the controller seems to be working again, it may have just been a fluke. but it got me a round trip of nearly 38 miles today around town,i always charge when i get to work of course. it seems i do need more volts and a stronger battery pack, so i will be doing a 96v conversion at...
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    Tomberlin 48v 5hp LTO data

    This makes me feel so much better about my build. 130farenheit motor when run for miles. 212 wh per mile average. 50mph top speed. And 32 mile range. How's your speed after midway through pack?
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    Preppers talk electric cars...

    ive actually been considering this alot, ive decided that burying an insulated shipping container and storing anything electrical i could see myself needing, such as a fridge, electric car, things like that, people dont realize how much we need electricity and the "comforts" it brings with it.
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    large road legal electric go kart build. need help!

    another update, i think the controller may have just failed? i tried a reprogramming and it works again, but it works either throttle full on or full off, which means i am at a loss, i dont know why this would happen and ive tried two throttles. and nothing, just full on or full off. also golden...
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    large road legal electric go kart build. need help!

    So after checking the car. I tried a new throttle and its responding again but only at full on or full off. And the BMS is no longer reading watt hours. On becoming quite concerned as to what this could be. I'm going to see if a reflashing helps?
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    large road legal electric go kart build. need help!

    I'm going to check this out. Doesnt the BMS system just balance everything on its own? I'm sure the controller was dead cool since it had only done a quarter mile. I'm going to check what you've just reccomended right now and see what happens s
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    large road legal electric go kart build. need help!

    so good news ans bad news. Solar works swimmingly, it was charging me up at between 3.2 amps and 5 amps, amps would stay at 5 if the car had been moving and cooling the panels off.. bad news... on the way to work she started to cut out then finally just stopped moving.. my thoughts are a loose...
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    large road legal electric go kart build. need help!

    i didnt even realize that i could just wire it to do two relays, however my vicor should manage to charge both just fine as they do seem to be independent, as long as my outlet can handle it. another update, my battery is now charging to over 7200Wh to me this is simply amazing, i am so happy to...
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    large road legal electric go kart build. need help!

    i need to see if they are isolated, i believe they are. it is a vicor charger at 48v, im going to go look up the specs and model number, how does this bms handle two chargers? i only had one relay shut off lead?
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    large road legal electric go kart build. need help!

    OK so my charger can charge two 48v batteries at the same time as it has two charge ports. Are you saying I can do that still? Also my batteries charge up to 4 50.4 volts. So that would be 44v nominal? Sorry for the confusion! This would mean a 96v controller couldn't work for me?
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    large road legal electric go kart build. need help!

    So my little car that could successfully took me from home to work to home today. I charged up at work just in case. But I think its clear voltage is my enemy. Or the lack thereof.so I'm going to overvolt my motor while keeping an eye on amps etc. I think running my motor at 12 or even 15 kW is...
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    large road legal electric go kart build. need help!

    They were supposedly broken in I believe they had quite a few thousand miles on them. But this is awesome they increased almost a full 1000wh from when I first bought them from 5800 to 6900wh!
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    large road legal electric go kart build. need help!

    weird thing ive noticed... so every time i do a fairly good drive cycle, say 15 miles. when i got o recharge it, its been able to charge a bit higher up it used to top out at 6100 wh, now shes currently charging up to 6780 wh, and at an efficiency of around 200ish wh per mile... thats an extra 4...
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