For me, when floored, the throttle stays open and boost does all the work. Originally, however, the throttle would close too. It was difficult to figure out if the tranny was closing the throttle, or the ECU, but from what I could gather after watching it and tinkering, the ECU only closed it "if" the boost control wasn't limiting it enough. The boost control is too slow so boost often gets out of hand and throttle kicked in.
When I floor it in 4th gear, so the tranny won't bother me, the throttle was 100% open and it was all boost control. Things are happening slow enough in 4th that boost control actually works. Now if I forced more boost than it liked, then it would close the throttle. I recall one time it closing and holding the throttle at ~25%. I forget why but I was experimenting and that was the result.
All my limiters are out of the way, and not just because they are annoying. Imo the limiters kick in too late, then as a result, respond by too much. So you overboost, then no boost, then have to recover from that. So I mainly use Torque to Load but also have it set to ramp power down more slowly as I get closer to mid-range, so the slow responding boost control can work and not overreact. The pix shows it better than I could explain. It's not an issue unless at max load, so max load is where it's modded.
What's your Optimum Torque now? I really think it should be at 100. Imo it's easier to set Optimum to 100 and use Torque to Load to control boost/power. If you have Optimum at 90 or something, then it's simply less on the Torque to Load because it is not hitting the bottom row in the map. It just makes it more complicated is all.
If going right to 100 makes you nervous, and it should to be safe, I'd still make it 100 but lower Torque to Load instead. You can math it out so 100 Optimum ends up netting ~stock power, then adjust from there. If not then you spend time trying to figure out how much of each equals your net power. Max out Opt and you can forget about it from then on.
On mine you see I don't go to 100, that's because the input of my Torque to Load is 80. So really my Optimum of 86 exceeds 100% command, which is simply to ensure it does hit 100% because the map feeding Optimum may not be feeding it 100%. Say the value feeding Opt is 95%, the 86 value is making up for it. If that makes sense. If 95% was coming into Opt, and it max value was 80 instead of 86, then the output into Torque to Load would likely be 75 or so, falling short of the bottom row in the map.
OptTq.jpgTq2Ld.jpg
Link to stock M178:
https://forum.hptuners.com/showthrea...l=1#post693653