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Hello people!
Reposting this since it didn't get too much attention in the member introduction section.


I recently acquired the first component for my future EV conversion. I'm still not sure where I'll install it but I'm interested in slowly gathering the whole kit and figure out which vehicle later.

So, as many of you might know, I fell into the trap of buying a re-labeled HPEVS AC-31 motor, now labeled an AC-41. Bought the motor through Offerup from a guy named Greg in Georgia, apparently he had a bunch of them and I payed $300 plus $250 shipping. After looking at what all other HPEVS motors run for, I thought this was an opportunity I couldn't let pass.

I knew nothing about the motor, and I could barely find any information online or on the HPEVS website, I know I should've done my due diligence before buying, but I was too excited. So I did all the researching right after the motor was home.

I decide to call Brian at HPEVS since they're local to me and I thought I could just go chat with him about the motor. Surprisingly it was not a welcoming call, he immediately denies HPEVS ever made an AC-41 and turns me down, I get confused and explain where I got it from and answered it's probably an AC-31 from a Wheego, and that is all he could help me with; since the Ontario facility is only for Manufacturing I should go to one of their dealers for any questions.

OK, at least there is still a little bit more info on the AC-31.

My next idea is to go visit EVwest, maybe they could help me figure out my plan for the motor. So I go ahead and write them an e-mail asking if I could stop by, explaining the situation and how I'd like to maybe potentially install it in my Porsche 914.

I get a reply from Michael at EVwest basically saying that the AC-31/41 is not a good motor for the 914 and it is known to have heat issues, along with a quote for their complete AC-50 914 kit ($$$$$$).

Well crap, thankfully my 914 is running great at the moment so I'm in no rush to remove the ICE from it, but it got me thinking, maybe I could use the motor for something else, maybe a UTV or Motorcycle where it will not be forced into pushing a lot of weight and hopefully prevent overheating.

So, after saying all this, my intention is to slowly gather all the components like batteries, controller, etc.., so that I don't break the bank all at once.
I've been eyeballing the LGchem batteries, I know EVwest uses them in their M3, and I could easily buy them one by one until I get the amount I need.

I know the AC-31 is rated for 96v but I read that it could perform better and cooler if ran at higher voltage. That way I could start with just 2 LGchems(60vdc ea) in series at 120vdc and add to that in parallel if I ever need more range.

I'm a 28y/o mechanical engineer, so I have a very general understanding of how all this works, I've never been into electrical so forgive me if something doesn't make sense I'm still trying to learn/understand. My skills are fair, I've never rebuilt an engine, but I've replace mechanical components here and there. My everyday job includes Solidworks CAD and I also have access to a machine shop with CNC mills and Plasma owned by my father, but I'd like to use it as little as possible since it's 2.5 hours away from me.

Is there anything else I should be aware of?
Will the LGchem batteries not work with my motor? should I get something else?

I know it's common practice to base builds around range/performance requirements, but since it'll be hard for me to get rid of this motor I'm thinking I might as well keep it and design my project around it, I don't have anything set in stone, but a road legal vehicle would be nice so I can do my 15mi commute. One other possibility would be to install it it a honda F350r oddissey or some other lightweight UTV to have as a toy.

Any insight/opinions are welcome!
 

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Maybe there's a way to buy a second ac31 and siamese the two to run cooler. It could also work for a tractor conversion, to run hydraulics. Maybe you could make a cooling system for it.
 

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Hi Mendi,

A few years ago there was an unscrupulous character out of California selling surplus AC41?31 motors and likely the reason for response from HPEVS.

My advice is limit your exposure on a "deal" and not put in any more money and limited time until you can get a motor controller which is compatible with that motor. Other system components will be dependent on the controller. Get it first. Get a guarantee that the controller will work with your motor from the seller. I suspect that will be expensive or impossible unless it is a Wheego and you can find a Wheego controller, made by Curtis, I think.

Good luck,

major
 
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