Well stupid rich or not the stock housing doesn't have the motor pull timing at 4200+ rpm's like this housing does. As far as I know there is still no data that says the truck runs in closed loop any better either. I think all of this data should have existed at the creation of the housing before someone turns around and sells it to the community. If Landtank wants to pay me plus the $75 an hour for the dyno time to go back to the dyno and try and drive within the parameters of closed loop and try and duplicate two exact dyno runs (which is why they go full throttle so that you can actually make meaningful comparisons) I will. But as far as I am concerned I am done with the Landtank housing. If I have my foot to the floor that is when I need power and the very last thing I need is for it to be pulling timing and power.
Thanks for posting the pics and info on the parts. Was the AFR at the tailpipe for the first two runs of 14.7 checked or was that a default value? It looks like the AFR on the first two runs is 14.7 though out. I really don't think this is correct maybe it was a default value? The third run is 10.1 (expected) in open loop.
From memory, open loop in the OBDII trucks has always been stupid rich with or without the housing. Your right that maxing out the TPS will send you into open loop. Nothing but adding forced induction or NOS will help the AFR in open loop with the OBDII trucks. I recall most benefit from the housing and sensor being in closed loop. Closed loop is where most people drive these trucks. Air flow data back to the ecu was higher throughout the closed loop range compared to the original sensor with STFT and LTFT in correct range too. Hence no emissions codes being thrown.
Enjoy the truck, it looks great! Should run near forever.