Search results

Date Relevance Most replies

  1. J

    300hp single seat off road buggy project

    Here's what 65Kw can do in a 1240 lb vehicle: https://www.youtube.com/watch?v=W7qHHbTEPa0 That's scary enough winding out 2nd gear doing over 80 mph on the highway. I can't imagine having 300 Kw of electric in a smaller frame.
  2. J

    Crazy "knee" scooter.

    Awesome. FWD it is. It was an older "Pride Victory" scooter. The stock controller was 70A model. The old scooter probably weighed 80 pounds and supported 350+ lb people in stock format, able to climb slight hills. This knee scooter probably weighs about 30 pounds. The Kelly does have a ramp...
  3. J

    Crazy "knee" scooter.

    Ok, so modified a mobility scooter a while back: https://www.youtube.com/watch?v=Ib5SEWjYTJ0 I machined out the wheel hubs to fit larger wheels and slight over-volted it with a 8S LIPO setup. It lasted for years, but the controller finally died the other day after hours of kids off-road...
  4. J

    Runaway Throttle, Interlocks, and Regulation

    Story time: I recently had a bad throttle situation on my dune buggy. When driving around the previous day, my controller cutoff... so I knew something wasn't right. I pulled over safely, checked things out and couldn't find anything obvious, so I restarted the controller and everything seemed...
  5. J

    My electric Volkswagen Sandrail (Dune Buggy).

    The driveshaft is facing toward the front of the car (side with the fan is in the back). You can kind of see it in the pic above, attached to the rear transaxle. I realize the fan is designed to pull the air through the motor, then redirect it over the case. I'm not sure how great the air...
  6. J

    My electric Volkswagen Sandrail (Dune Buggy).

    Ever since I downgraded from the 650A to the 550A model controller, it hasn't been able to keep up the continuous power handling with no water cooling. I happened to have some PC liquid cooling parts lying around, so I thought I'd give them a whirl. The radiator is hilariously small, but it's...
  7. J

    Crazy idea: Wheelchair motor mid drive.

    I had some wheelchair motors. These are insanely heavy duty brushed motors made for pushing fat people around town. The motor is 24v, and can be over-volted. It has a gear down reduction, and the shaft goes perpendicular (off the side) of the gearbox. It also has an indention that easily makes...
  8. J

    KiwiEVs next project fast EV

    I would love to see some acceleration runs on that thing :mrgreen:
  9. J

    Building a sporty EV. Need some help estimating performance.

    I honestly didn't open the box that far to check. Is there an easy way to differentiate between the two? I thought they were all kind of mounted near the back by the aux shaft. I read about yours going and taking out a controller with it. I couldn't afford another controller at this point, so...
  10. J

    Building a sporty EV. Need some help estimating performance.

    Look what came in the mail! :mrgreen: Got a 1000A continuous Gigavac maintenance switch, automotive grade adjustable temp fan & pump switch, dual wiring harness with potted opto isolator, curtis connector covers for a nice look, water chill plates, and two 1238-7601 controllers are...
  11. J

    Building a sporty EV. Need some help estimating performance.

    I don't believe so; they have that in order as of yesterday, and it's finally ready to ship. Shouldn't be too much longer until I get all the goodies in the mail. I think the only thing I'm missing is the main pack fuse and one more individual controller fuse. I'll be able to do motor testing...
  12. J

    KiwiEVs next project fast EV

    As long as you're using a charge controller to limit the amps being fed between the two packs, I wouldn't see a problem with it. It would be the worst idea ever if you didn't use a charge controller though, because the only thing that would dictate the charge rate would be the voltage...
  13. J

    Building a sporty EV. Need some help estimating performance.

    Ok, so here's the story: I bought the AC35x2 /w rear aux shaft second hand without the controllers, never used. I was hoping to quickly rig my own two controllers on it: 1238-7601 (650A) & 1238-7501 (550A) I then discovered that motor required a special wiring harness with opto-isolator to...
  14. J

    KiwiEVs next project fast EV

    I'm not sure what you mean by "one more cell" being enough. For a fast charger? Of what? By the way, the rear cover looks great. It's nice to be able to tell if mods like that make a difference just by monitoring cruising power consumption.
  15. J

    KiwiEVs next project fast EV

    So correct me if I'm wrong here. You're running 48S1P 160A Winston LiFePO4 cells. Going uphill you've got sag to 132v pack voltage, which equates to 2.75v per cell under max load. Total pack weight, 282 kg (620 lb) for ~24.5 kWh at 100% DOD. If you were to swap to Tesla modules, you could do...
  16. J

    KiwiEVs next project fast EV

    Could you tell me what your current nominal voltage is and how much it sags under full ~1000A load? Thanks!
  17. J

    Building a sporty EV. Need some help estimating performance.

    I suppose I should mention that this was always a budget build. I paid about half of what the kit costs & already had the programmer. It's admittedly not ideal because money. I know that once the motor is on, it's a pretty decent platform for an upgrade in the future as cheaper A/C induction...
  18. J

    Building a sporty EV. Need some help estimating performance.

    Just to clarify, are you saying that there is more than one winding for the same model of motor? Acceleration forces are dependent on time, and I'm more than willing to add a few tenths of a second by programming in parameters to ease drivetrain strain. I've already got the OEM Curtis...
  19. J

    Building a sporty EV. Need some help estimating performance.

    If you read their section on the AC-35 motor, it was definitely designed to run on the 650A controller too: http://hpevs.com/hpevs-ac-electric-motors-ac34-ac35-for-automotive-mining-utility-ground-support-vehicles%20.htm That's why they bothered to do the tests at 108v & 650A with the...
  20. J

    Building a sporty EV. Need some help estimating performance.

    Missed this earlier. Portsmouth, VA.
  21. J

    Building a sporty EV. Need some help estimating performance.

    No offense taken. Glad to be speaking to someone with experience using the motor. My motor is definitely the AC-35x2. New in box: The motor says 144v, but I purchased this second hand (unused). I've got the higher amp, lower volt controllers for it. I'll be working with ~260 ft lbs of torque...
  22. J

    Building a sporty EV. Need some help estimating performance.

    Just to clarify, I already own the motor (which is really two 3-phase motors built into one). I had 1 controller already, so I ordered a second to match. I couldn't afford to buy two of their 144v controllers now. However, the difference isn't THAT huge. The Curtis "96v" controller can safely...
  23. J

    Building a sporty EV. Need some help estimating performance.

    Sporty is relative, true. Well, Here's my AC20 build weighing about half what the 240z will weigh, running ~103v nominal: https://www.youtube.com/watch?v=W7qHHbTEPa0 That's working with about 80 ft-lbs of torque according to the company's graphs. The AC-35x2 has 3.2x the torque, so I was...
  24. J

    Building a sporty EV. Need some help estimating performance.

    I've been piecing together parts for a while now, and I'm in the market for a Datsun 240z as the donor car. It will be manual transmission with a curb weight of 2300 lbs (ICE equipped). It will likely not exceed 2500 lb post conversion. EV Parts going in: HPEVS AC35x2 motor Dual Curtis...
  25. J

    My electric Volkswagen Sandrail (Dune Buggy).

    I've seen your build before I was building mine; yours is awesome with nice fab work - better skills than me. I just put mine on the scale at a scrap metal yard the other week, and it was 1240 lbs. Check the comments in this thread earlier on for the build thread, it's on the DIYelectriccar...
Back
Top