I also found this:
I did some math (for my application, anyway) - looks like about a 2.8 volt drop at 400 amps across 4 cells - I would need 16 cells, which would give me 11.2 volts drop at 400 amps - I need 1.75x as much current, so if the relationship is linear, that would net me a 19.6 volt drop; to match my drop with 1 set of LTOs, I'd need to run 2p16s; and to cut it in half, I'd need 4p16s. On the bright side that would also give 80ah capacity - which is crazy. It would also weigh a bit more than the 1s26p LTOs that I'm running now - I'm at around 60 lbs; 4s16 would weigh about 80lbs (well, 73 lbs in cells, and whatever the case, bus bars and balancer would weigh); on the flip side, to match my current performance, it'd weigh about 15lbs less - 36.6 lbs for the cells, bus bars and case, etc. The amp-hour capacity on the 4p16s would be more than double what I have now.
In a nutshell, I think you made a good choice, and since you have machining chops you should have no issues making a case and bus bar system. I'd suggest you do the bus bars in aluminum - cheaper, lighter and no galvanic corrosion issues with those cell's tabs (my bus bars are aluminum for the same reason - I also use noalox on the terminals). You can certainly over build the bus bars - I did - I used 1/8" thick by 1" wide aluminum bar stock. For your application, drawing less current but having similar amp hour capacity, you should be able to enjoy boost on the street for a good long time before needing to recharge. But for me, I'm not seeing enough advantage to switch over - esp. since I have enough cells to make a 2p26s pack; and on the bright side, I paid $1,250 for 60 cells. Lol - this stuff ain't cheap.
FWIW, I think somewhere I saw plastic carriers for those things. Or you could always 3d print plastic carriers from ABS or nylon (if you have access to a 3d printer - if not, good excuse to buy one!
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