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how to reach 50-55 mph?

8458 Views 44 Replies 7 Participants Last post by  nickydlax
Hey guys im brand new, I need some help figuring out my first build
My goals are to have an electric kart that can get up to 50-55 mph at the most. Acceleration would be awesome too (anything more than a standard car) but id like to take this to work every day, it's not too long of a drive.
Anyways. Would a 72v motor get the job done? If I use a 72v, what should the gearing be? Im thinking about using motorcycle wheels fyi. Thanks in advance!
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A 72v system will be cheap and easy to build. As example, my 1900 lbs car reach over 60 mph with only 72v (but I've 5 ratios transmission).

Is your goal is performance or cheap build?
Do you need a reverse?
That sound like an interesting project!
If you want a fun buggy, 72v is correct..., but If you want a high performance buggy, I would suggest you to start with a 1000A controller (like Zilla 1K or Ziva MC1000C).
Like that, you will be able to increase performance or upgrade if you want.
Here is a friend with his kart with Zilla set at 100v and 800A (if I remember correctly):

Also, keep in mind that if you want high performance, you will need high performance battery ($$$$). No performant battery, no performant at the motor shaft...
....goldenmotor? They look like they have a lot of options, lots of power too.
No, 13 hp continuous and a peak power around 26 hp isn't what I call "a lot of power".
Especially with the low rating torque available from those motors (less than 25 lbs-ft). I can't find the peak torque of those motors with the HPC700H controller (their most powerful controller).

If you need to keep it simple and go with a 72v system, I suggest you to use an Alltrax controller. The SPM-72500 or the SPM-72650 coupled with a 8 or 9 inches motor should give you good performance. (

If you need high performance, a 1000A controller coupled with an 9 inches motor will give you between 180 lbs-ft and 250 lbs-ft of torque.
With proper battery pack and if you keep the overall weight low, you can expect to beat everything on the road at low speed (0-60 mph).

You can also keep an eye on those AC motor kit who can do a good work too.

About reverse, do you think about the idea to use a transmission coming from a small car (geo metro or other)?
And finally, please share picture if you have one!
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