Macribs, it's simply too much load for 2 motors run in-wheel. The factory has most recently been running them on scooters that weigh 150-175kg depending on the model with a max suggested load of, I believe, 100-120kg. Call it 500lbs all up load typical or 600lbs max, and those big loads for them to run 50A battery limit for each half of the motor, for 100A total and the all-to-common phase limit relationship of 2.5:1 to get some semblance of acceleration on takeoff.
Even at that modest 7kw peak power level the load causes longer durations of higher phase current, so the controller has to monitor motor temp and cut back when it gets too high. Compare that to the 380-400lb all up load I pushed for a year with my stock motor at running 16kw peak at the same voltage giving me great performance with no temp monitoring other than the knowledge and experience of the highest stress situations to avoid like low throttle up long hills and inescapable bumper-to-bumper stop-n-go traffic that can happen downtown. Somewhere right around 400lb of total load is the limit for going for high performance. Ventilation and/or a lighter load at in-wheel gearing is what enables going to truly awesome performance.
Joe needs to push 2300lbs, which is likely to end up at 2400-2500lbs, and there's no way a pair of HubMonsters can push that load well in-wheel. Gear that down at 2.5:1 and split it between 2 motors and each motor is still looking down the barrel at conservatively a load of 500lbs per motor, but Joe wants more top speed putting the load more like the high range of the factory scooter. To top it off Joe wants more than double the thrust, so even effective ventilation leaves him with the motor running at high stress.
The route to success with high performance is having plenty of motor, not running one at the margins. Look at the monster size motor LFP runs on his Deathbike, and that's geared to only 110mph max and pushing an all up load of 300lbs or so.
Joe, you should check with Zero Motorcycles. At least for a while they were selling their drive system, and a pair of those would be up to your task, though you still might be fairly close to the margins unless theirs can handle higher voltage well. 4 of our MidMonsters will probably suffice using 118V nominal, but 4 motors and 8 controllers is getting complex enough that I'd be hard pressed to recommend.
How about starting with a much lighter electric car kit like Kiwiev did?
https://endless-sphere.com/forums/viewtopic.php?f=7&t=69603