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I hear you!

What's really unfortunate is that the Hobbywing ESC would be great for your setup. As much as I love the MGM stuff, it's expensive and getting things serviced is difficult. Don't get me wrong - great guys and a good product, but with the Hobbywing being 450 USD, it's tough to say no to it.

We're here to help. I'm a little touch and go right now building this new house here in Texas, but I'm turning my attentions back to the forum and all. Welcome!

That is really great stuff. WB - this is the guy I was referring to in the other thread...

Sorry for the delayed response - had an eventful two weeks driving down to Texas and dealing with things. Three flat tires and I now apparently own a dog. But to answer your question, from Battery Hookup.

I'm sorry to hear that. Another guy I'm talking with has had very good results with Castle and Hobbywing. Though I feel your financial pain...

I used Zeee batteries for my initial tests (including my first drag test). After much testing, they're not great batteries. They should work, but keep an eye on voltage drop. Here's a load test I did that included my best Zeee batteries:

That's kinda what I'm thinking. It might be an easy way to pick up 5% more hp.

Do you all think it might be worth trying something like these: https://amzn.to/3XYnqIM I don't think they'd make a lot of boost, but maybe stacking several together might actually be worth something; particularly relative to the low cost. Do you think it's worth exploring? It'd be very easy...

I like that motor mount design a lot. It's quite elegant. Would you be willing to share the files with us?

matnrach - do you have current draw and voltage under load data? Also, what do your batteries weigh? I'd like to see how much smaller/lighter a Lipo setup would be for your setup, especially since it's a low duty cycle application. GTHound - at the end of the day, working for your...

Here's a sample discharge curve, fwiw:

For lead/acid batteries, the shape of their discharge curve is terrible, as is the life. Plus they have a pretty poor internal resistance for their weight. Can they be made to work? Yes. Are they worth using? No, not in my opinion. Lithium battery types pros/cons: LTO cells are the...

I think you're spot on. Looking forward to your results. And as for the Stratus, well, why not? Besides, insurance is bound to be cheap.

Welcome!

Casting your own back plate is awesome. I love all the stuff you guys are trying. I'm not sure I would TIG that casting to the backplate for fear of warping it - maybe some sort of mechanical attachement method might avoid that issue and maybe give you room for a little adjustment?

I use fine sandpaper to clean the contacts before I bolt them on with noalox - something in the realm of 240-600 grit (usually whatever I can find first). There's about a half a volt difference between copper and aluminum on the galvanic scale, with copper being more noble than aluminum...

Awesome! I'm really impressed with the rpm you're able to hit. As for the battery, when you're internal resistance limited, it's better to have fewer cells in series. Do you have enough cells to do a 2p setup? That would in theory cut your voltage drop under load. LiFePo4 cells are a good...

I really like your crimp solution. I have a hydraulic crimper, but it's designed for metric wiring - so not all awg cables fit the dies well. You've given me a great idea on how to make the correct dies fairly easily. Thanks! Though the more I crimp heavy cables the more I like this...

Thanks for posting this - I wrote a long reply asking for this stuff in the battery thread, then I saw you were already doing it here. Can you post pics of the the car's engine and your surrent e-boost setup and your datalogs and stuff here? I feel they're getting lost in the battery thread...