I have a 90mm MAF housing with a Hitachi sensor. In theory, at 5v the maximum airflow I can measure (without under scaling) is ~560g/sec. When I initially did the fueling, I looked at the few logs I could find and estimated that they were well over 600g/sec based on injector size, idc and afr. So, I under scaled my MAF by ~25% to give me a little bit of breathing room. Based on some of my logs at 32psi in cold weather, it looks like I have hit ~590g/sec. I am at 5,200ft, so I am limited to ~35psi (PR limit is 4) and I could probably reduce the under scaling, but when I go to sea level I don't want to hit any limits, either. I don't like that I have to under scale the MAF, I just don't see an alternative.
Where does this "560g/sec" limit come from?
If you're out of MAF then underscaling doesn't help you in any way, it'll still max out all the same. Explain your reasoning.
KFDLULS is FF. I'll give it another try, but in the logs I have posted I am fairly sure I am still seeing throttle cut due to pvdk (no codes, however).
Ok, let me say this a third time, so it gets through to you - the ECU will never cut throttle due to pvdk > plsol EVER. Apart from overboost related limp mode.
Which you are hitting because your models are screwed up.
Or maybe something is just broken. It is all 20 years old and I haven't replaced any of it. It seems like the signal line on the DV's isn't seeing positive pressure (only vacuum/near ambient) and the pressure differential is just pushing the valve open. Not sure if this is by design or if a check-valve is stuck or whatever. I'll take a look. Regardless, I don't really care. As long as I can get actual filling to meet requested filling without the throttle cutting I am happy.
It must see positive pressure, your stuff is plumbed wrong then. The only time it it doesn't is when the N249 is actuated.
