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  1. D

    Need Advice on Price... Enduro SL

    Local Bike Shop has a demo they are selling... a 2007 Specialized Enduro SL Expert some upgrades with a bit of use for $2200... it was originally higher (listed at $4600 back in '07) they wanted $2500, however, I fought and got the price down to $2200. I think this is still a little high for an...
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    A123 vs Headway

    I too am interested in seeing this though if anything I think the cylindrical ones may do better??? 20aH of the cylinder ones rated at 30C continuous would mean 600amps continuous with burst up to 1000amps or so. Burst at 0 volts would make no sense and so I would expect them to perform better...
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    Crystalyte 5305- Just How Well Does It Climb Hills?

    What I would do just to start out is put the batteries in series and get a controller which will pull the max number of amps the batteries can handle for now. (I didn't read what batteries you have now but I would keep it below 2C continuous for the smaller aH pack assuming they are the...
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    magic pie ??

    Sound like a lot of the issues you are having are due to the size of your wheel. If you ran a 26" then top speed would probably be around 25 or so on the flats although regen sounds like it would still be too strong from what I have heard elsewhere too. I would wait personally for the next...
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    Dewalt 36v Packs, are they worth using?

    It wouldn't be a problem , however, just know it is going to take a while unless you have a decent sized array of panels. I don't know a lot about solar as I live in a fairly cloudy valley however I will try to help :-) There are a few ways of charging off of a solar array... or so I believe...
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    LiFePo4 Batteries: Care and Feeding For Beginners

    Ehhh as long as you have a good BMS which watches each parallel group you should be fine. Cells are formed in the factory and are ready to go when you get them, however, taking it easy for the first few charges is my rule of thumb too... If you need at or above 80% right off the bat chances...
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    A123 vs Headway

    Incredible how long the A123 technology has been around (comparatively) and yet it still stands so strong :-) Very interesting how the headways have such a linear relationship between I and V vs the A123 curve
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    Dewalt 36v Packs, are they worth using?

    If you only need 15-20 amps continuous I would go with a 15 amp ping battery... cheaper and much easier to work with. The DeWalts I believe use A123 batteries which most people pull out and use to build custom packs. The ping batteries are rated at 2C so even a 15aH battery would not be taxed...
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    Fastest HUB motor

    Best chance for crazy acceleration is going to be dual drive, A123 or Li-Poly batteries, and two controllers capable of 100amps each at 80+ volts :-P Even then think about what you want and whether it would make more sense to just go with a motorcycle. Speed is easy with a lot of voltage...
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    LiFePo4 Batteries: Care and Feeding For Beginners

    I was under the impression leaving it on the charger should be fine as long as you have a BMS capable of bleeding away any sort of trickle charge being applied. Most chargers meant for LifePO4 will cut current completely I believe, however, other chargers people have built should not be left...
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    The catch-22 of ebikes...

    I agree with what has been posted so far. All ebikes can climb... its just a matter of how well then can. Some can climb so quickly they can throw you off the back while others will probably stall if you don't help them up. If you want a decent climber you should look at a rear wheel. The...
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    Rear Wheel Drive vs Front Wheel Drive

    Cool, welcome (soon) to the club of dual drives :-P Right now I have only a rear, however, until a few days ago was riding with only a front with a day of dual drive in the middle :-P Here are my thoughts on the matter: -I like front a lot better for powering into turn and also for...
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    Need Help with Battery Purchase

    Good to know :_) I'm PM'ing Stevo asking about the possibility of having a pack built for me using his used A123's... If I have a 6 or 8 aH pack even 50 amps peak would be less than 10C for it which should be fine as long as they are all genuine cells. Going to get a price from him although...
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    Need Help with Battery Purchase

    Yea, I have a single right now but it's still in a dorm so yea... I talked to a University Rep about Li-Poly and he said it's fine... no issues so that's back on the table too I guess (though they would have to be hard cases for impact resistance) Still, even with approval, it looks like an...
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    Need Help with Battery Purchase

    Thanks for the reply :-) In regards to selling my existing battery, if I should figure for a lot less than its worth more keeping the battery and using it as it is with the controller I have... everything stock still (because I still have a warranty on it and if I keep everything stock I know I...
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    Need Help with Battery Purchase

    Looking for help with the purchase of a new battery pack. Love the one I have now 36v 10ah lifepo4, however, the cells inside are 2C and I would rather rebuild than try to make this work. Want 35mph + on flats with 9C 2807 plus good acceleration (and thus a high C battery is required)(This...
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    Studded bike tires, selection and first ride impressions

    Same here although I took them off for now as we haven't gotten any snow since I put them on :-/ At first I felt like they would slide out on me fairly easily... until I took them on a frozen pond... that erased all doubts I had :-) If you lock the rear wheel on pure ice it leaves a cool track...
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    soooo cold

    Rode around in State College, PA yesterday testing out my dual 9C setup. By the end my LifePO4 was still running fine but the SLA's in my backpack weren't giving out anything even though voltage was fine... chemical delivery systems gets sooooo much slower at low temps for SLA technology. Now...
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    Spring '10 Battery Build

    Yes it should be a very interesting build :twisted: (Working with a local metal shop to custom engineer supports for the rear dropouts... even if they are stronger rear ones I don't want to be flying off :-P So yes, right now looks like I'll stick with one 9C in the back although I don't...
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    Strange performance from new ebike kit

    At rest after use a 36V SLA pack will read around 38-39 volts. 40 is a bit high unless you just too them off the charger. Fully charged the pack should be 40.5 volts. 13.5 volts is the ideal standby/float charge for good reason... ideal voltage between sulfation (too low voltage) and positive...
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    Spring '10 Battery Build

    Pics to come in a bit but the rough idea is matching 9C's front and back... kinda like ??Methods?? dual burnout bike. Huffy frame solid as a rock after 850 miles... weighs almost 35 lbs without electronics but I'll trade weight for safety anyday ;-) The rear wheel I grabbed used and worked on...
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    Weird Problem :-(

    In regards to the colors not matching but the wires matching...that was how it came :-P I don't know why but it's just a cosmetic thing so I don't think its a big deal. If I wanted to make it look better I would switch the plastic connectors, however, being as the connectors are hidden most of...
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    Weird Problem :-(

    I would normally edit but I found the problem... not a Hall cable, not the controller...not the throttle... see if you can spot what is wrong :-P can't find it... neither could I hence the trouble How about now? Yup... wire making intermittent contact = phases not all firing = trouble...
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    Weird Problem :-(

    Ok, have 850 miles on kit everything fine till yesterday. Motor started cogging when power applied kinda like phases out of sequence... immediately though hall sensor problem. Checked wires and everything looked ok (no open breaks or bad pinches), no problems. However, I had another...
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    My first BUDGET e-bike attempt, please help

    Glad you were able to purchase beyond the SLA's... they are a pain :-P Before I went LifePO4 I had SLA 18aH ones on my rack... I broke two racks that way :-P Also, while a Cycle Analyst is a good investment, it's all up to what you want to use the bike for. I'm in college right now and use...
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