turning up the boost, need to compensate?

[MyBeatGSX]

Um yea, exactly what the title says. I've heard two opinions on this. Some people say you need to retune, others say the ECU sees the extra airflow and compenstates because everything is basically liniar/proportional with an SAFC (plus the extra fuel pressure).

Which is true? I've heard both sides of this from reputable people so I don't know who to believe. I'm only going up 1-3psi.

 

[GVR4592]

It would most likely be ok depending on your current boost level, but you need to datalog and find out for yourself.

 

[CanadianTSi]

I highly doubt you will have to retune.

Turn up the boost, log a pull and then you will know

 

[Kevin Jewer]

Both are correct.

-If raising the boost puts you on another load level, AFR and timing will change, but in the safer direction.

-If you already have the ECU maxed out on the highest load map raising boost will have no effect on the tune.