My old 4wd explorer... Knee deep whoops at 55 where no problem and the limitation was the rear suspension!!! The front end was capable of WAY more then that and I wasn't even on coilovers. I also ran the rubicon trail once in it and only bypassed the little sluice.
I honestly 100% think that the setup you have in mind will completely scare the crap out of you at what it's capable of speed wise.
You really think TTB setups can't run the hammers???
For the record, Robby Gordon blew up the motor in it last year, didn't break the suspension though and he qualified really really really well...
BTW, 4wd TTB will go easily 99% as fast thru the rough as a 2wd ibeam setup will which I've seen 120mph thru waist deep whoops on old class 8 trucks.
Want something a little more realistic for what I'm building and you're planning?
This expo is 4wd with TTB...
Steering needs to GO AWAY on this one though...
Pretty much, the limit of what this system will do is just like solid axle or a-arm ifs, it has more to do with your budget and willing to toss labor and parts into it then it does the limitation of the design. There's fullsize guys pulling 20+ inches of travel out of these things!
Need proof? Here's that torchmate KOH rig making everyone look like entry level rigs in the fast sections and then it's obviously more then capable of running the whole KOH course. (MAKE SURE YOU WATCH FROM 9:18-10:30!!! some of the most insane KOH incar I've seen!)
If all goes as planned, you'll probably be away but I'd say come wheeling with me in May!