|
It’s not just guessing, it’s constantly adjusting. And a lot of GM fuel injected vehicles don’t have a fuel pressure sensor at all. If the fuel pressure drops on those, it will see that it’s running lean when in closed loop, part throttle mode, and fuel trims will adjust. Long term trims will carry over and wot/enrichment will be guessed at, but the ECM has no way of knowing what the actual AFR is. You really need to read up on how GM oem systems work.
Your formula will be more accurate than one that doesn’t have a fuel pressure sensor measurement, but it still will be a guess. If it wasn’t just guessing, then there wouldn’t be any reason to tune a modified car.
But yes it really does this from pressure and airflow table look ups. There is a lot of math that also goes into it as it decides how much of each table to use.
Again, you think you have thought of something that no one else has, but none of this is new and if it was easy as you think, everyone would do if your way. I’m not getting a kickback from the wideband gauge people.
But if your car is stock, you can monitor your calculation and never know the difference. At that point it’s just a fun exercise. If you increase your boost level by more than a little bit, then it will matter.
|