The best method to prevent / minimize bog is to feather the clutch. The alternative would be to set the 2-step extremely high, i.e. 6,000 rpm. Even this method would cause a bog but not significant.
It's also very important to set your 2-step activation switch so that it disables the 2-step at the nano-second you start lifting off the clutch. My setup uses the factory clutch switch (upper) to activate the 2-step, not a reed switch. I tried a series of spacers on my switch and finally got it to disengage at the instant my clutch pedal starts to move. I know mine is set up perfectly because I installed an LED which lights when the 2-step is enabled. This is my visual proof that as soon as I start releasing the clutch, the 2-step disables.
Has anyone datalogged while the two-step is enabled and working? My datalog does not show the rpms which the 2-step limits the engine to. My datalog looks like it shows what the rpm would be without the 2-step impeding the rpms..... Can anyone confirm this? I could test this now but my car is in the shop for clutch/tranny TSB work. Probably won't back it back for a week....
Willie