5 or 6 years ago there was a couple of guys who put _3_ chinagirls on a trike. I had some pics, but redid my system recently, so they're not on-hand.
I dunno how the trike did in the end (details are scarce unless you're an insider), but I do know this immutable fact:
Double the chinagirl, double the probrems. Same with tripre. The chinagirl was designed over 50 years ago and it can be finicky if you get needy.
Over the years there's also been some poor dudes putting 2 chinagirl cylinders in one case, attempting to make a *******ized V-twin.
None have been successful outside of prototype stage that I know of, so far. (I try hard to keep up with all MaB stuff, and always open to corrections)
If you need that much power on a bicycle, most sane folks would tell you you need a motorcycle or something above a MaB.
My own opinion, not that you asked for it but here we are in a freegin forum, and me having done this thing since '06, and gone 40+ I spose I'm gonna say it lol