Also, one of the reasons your engine didn't blow up yet - this underscaled MAF actually makes your AFRs somewhat decent. If you fix the MAF without fixing the overboost first - you run a risk of leaning it out and melting or breaking something.

Maybe, but that isn't the problem. You don't seem to understand what we're saying

If your fueling is right (apparently by blind luck, it wasn't thanks to anything you did right), but MAF is underscaled, likely you have a leak of some kind or your krkte is wrong. You're damned lucky you have a WB car.

Not even close. It is entirely unrelated to your boost issues. That is a completely separate problem.

At this point you really need to step back from what you are doing and try to understand how the ECU works

Agreed. Boost first (get it sane - get it consistently below ps_w max), then fix MAF/fueling issues, then revisit boost, then revisit fuel, then timing.

Does your KRKTE match theoretical?

Why would you use stock KRKTE if you aren't using stock injectors?

Why would that fix KRKTE if you set it wrong for your injectors?


This can't be done w/o getting your MAF scaling right as well. In general, you start with KRKTE at theoretical, TVUB from injector specs, and scale the MAF until your trims are right (assuming you have no idea what your MAF curve is.)

If you do know what the MAF scaling is, and you leave it at theoretical, and your trims are WRONG there is something wrong with your assumptions.


Find out FOR SURE what your MAF diameter is compared to the file you intend to use. Don't guess.

Same with the MAF sensor.

I'm really puzzled as to your approach here. None of what you posted really makes any sense to me.