Keeping the build thread going.

Bus bars for the LTO cells showed up. Cleaned those up and fired up the EBC to top balance the cells. Wonder how long the three lead acids batteries in the truck will power this :D

IMG_20251121_220251908_HDR.jpg



Likely won't be until January that the first set ...

Do you have a picture of what the rear axle looks like currently?
I can't really see it in the picture of the back. May help think of different ideas. I was thinking 2 motors if it's split..


I don't have much interest in making modifications to the current drive axle unless doing so costs much ...

What about looking at truck e-axles? I'm not sure theres much of a market yet but i think this may be your best bet to having something strong and reliable. The LDUs are powerful but not what I'd consider to be reliable. You may be able to adapt their inverter or another inverter to the eaxle ...

Right now, the LDU is probably the most powerful option available at a reasonable price. Any of the newer EVs making more power are doing it with multiple motors, and more complex gearboxes.

I think it's just a matter of sorting out the right drivetrain/gearing selection for your use case ...

This is a maybe -

https://evwest.com/tesla-large-drive-unit-4-51-reduction-gear-set

480 peak ft. lbs x 4.5:1 LDU ratio x 6:1 Oshkosh TAK-4 ratio makes for 12,960 peak ft. lbs.



With those ratios, 70 mph at 15,013 rpm, 65 mph at 13.940 rpm, and 55 mph at 11,796 rpm. For the most part, I never ...

Got somewhere with the data on the transmission, today.

Torque converter ratio is 2.44:1 and 1st gear is 3.49:1. With the diesel peak torque and axle ratio, it peaks at 15,313ft.lbs. to the wheels.

As far as weight goes, the Tesla LDU and Winston traction pack come in at a approximately half the ...

I've done the math. The simplest thing to do is to keep the LDU and your axles, as Mangelsdorf suggested. That will give you a top speed of 60 mph and a torque of 15,000 ft-lbs.


Yeah, dang, I noticed this eve that I missed the decimal in the tire diameter last night. 423" tire was a bit off ...

Some goodies came in a couple days ago.

Yinlong 40Ah LTO cells to make an 80Ah 12v battery. This will be for LED lighting, radio, maybe the air compressors, etc.

IMG_20251110_014809169_HDR.jpg


Set of four Viair 380C compressors to operate the air brakes and horn.

IMG_20251110_014632995_HDR ...

For some reason, I was thinking the stock Tesla LDU final ratio was around 12:1. Looking it up, it's actually 9.73:1?


Edit: sat down to runs some numbers with data in front of me -

Current DT466E peaks at approximately 215hp and 540ft.lbs.
MD3060 has a 5.17:1 1st gear. I don't know the torque ...

Update: Kiwi got me working. Just one setting had to be changed.

I have seen one instance of the rotor shaft stripping out, but I assume that must have been a fluke metallurgical issue, because I have not heard of other reports of that happening. I have seen stories of gears failing.

I do wonder if maybe you should consider keeping the stock gear reduction ...

I'll email Kiwi to see what she has to say. If it won't start balancing unless all cells are above something like 3v, then the user adjustments aren't as useful.

I think you activate balancer in can and set its limit. See jk bms protocol i posted in link above


Hmm. I'm not sure that would work, but I'll look in to it. These have Bluetooth. Kiwi at Enerkey told me that CAN has a bug at moment. Some folks have tried to get CAN to communicate with no luck ...

No need for CAN or coms at the moment.

I'm currently attempting to get them to activate balancing while the cells are at lower voltages (2.7-2.8v). I've been adjusting equalization settings this eve and balancing still will not active. I can take screenshots of what it has.

Anyone use these? - https://www.enerkeybms.com/sale-53556662-enerkey-bms-protection-electric-vehicles-smart-bms-16s-17s-18s-19s-20s-21s-22s-23s-24s-100a-200a-300.html

I have four of them for my car conversion I'm working on. Their brand is also known as Neey, and now PowerDog, but Enerkey is the ...

I think HP-wise, you'll have enough, but the durability/strength of the gearing components is a question.


Exactly that. The torque of the sport version motor is nearly the same is my engine. Horsepower is is a touch over 3x as my engine. I have an Oshkosh 55000 transfer case that I would ...

If I had the budget for Cascadia products and adapting their motors to what I would need for a transmission, I'd go for a 425 - https://legacyev.com/products/cascadia-motion-im-425dz-d-kit

Initially, I considered installing a twin Tesla sport LDU setup, but one looked to be plenty. I'll run some ...

Meant to mention here that I read through all 33 pages of the LDU support thread. Somewhere in there, I think, someone said that somebody out a Tesla LDU in a 19-ton bus and it moved fine. I haven't found said bus yet.


I also intend to make moulds of the hood (bonnet) and doors so that I can ...

jrbe wrote: ↑Tue Nov 04, 2025 10:45 pm The subscribe to topic visual is opposite my expectations, checked means not watching, unchecked means watching.

Don't quite know yet. This forum is a very different animal, compared to all others I'm on. Ay take me a while to get acclimated to it.

Huh. I didn't get any of today's notifications. Looks like the picture I posted with Imgur worked, but I just searched and saw mentions of using the attachment button that I haven't seen yet. I may be too new on here to attach images yet.

As far as I can tell, the Tesla sport LDU can run at ...

Holy moly. Cool to see you on here as well, Zerobalance. Gonna follow your progress here.

Trying out image posting. Looks like I need to use third-party image hosting. Haven't done that in years.

johu wrote: ↑Tue Nov 04, 2025 7:15 am thats serious
Yes ldu boards are still sold as before here in the shop

Right on. Looks like West Side EV has the stuff I need

Hey, all. Quite new here. Decided to join and continue my progress with OI.

In the works is my 2002 International 4900 dump truck - formerly a MODOT salt truck. I'll post pictures as soon as I figure out how to.


Currently, it runs a DT466E that peaks at somewhere around 90kW, I believe.

Plans ...