Primatic LTO vs cylinder or yinglong cell

[L1ttlet]

So currently I have a high output alternator 320amp charging @14.8. It's charging a single bank of 40ah yinglong bank, yes it has a balancer. I habe been running this setup for 3 yrs now without ever single issue. Couple things I've noticed is it nvr gets to maybe 13.5 volts(I think I'm bassing to hard) I also have oem alternator belt and brand x alternator. I'm running 5k rms right now I'd predict after all the drops.
I know I need a smaller belt and to charge @15.2 (how do I bump the charging output up of alternator?)
NEWAYS, sorry for the long intro. I'm about to go with a ruthless 10k and theyre mids amp as well. I am wondering should I just add to the yinglong bank? another 80ah added. or switch to an 80ah of prismatic lto 20ah cells?
I'm really needing the space saved with the smaller prismatic cells and weight as well.
What would u do? can the prismatic hold up as well as the yinglongs?
any help is greatly appreciated.

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[hispls 5,000+ posts]

You're really redlining the YingLong 40s charging at 7-8C and discharging at potentially 12C.

I believe you're pretty hard limited by the energy density of the cell chemistry. Or put another way, the 208 cubic inches of any other sort of LTO cell likely won't store much more or less energy. You can trade off between discharge/charge rate and reserve but there's no free lunch until you get into a different (less stable) cell chemistries which have higher energy density.

If you're dropping voltage hard on burp you might look into switching over Lishen or Toshiba with the higher C rating, if you need more reserve to play for 10 minutes hard another bank of what you've got would probably be best.