I was wondering if some one could tell me from experience how fast a p73 computer in an 01 type R will learn that I have changed intake and ehaust and hence richen the a\f mix

I heard someone say it takes like 150 miles or so. Does this sound correct?

and by how much does your ecu try to change your mixture and timing at what Rpms?

And if so does that mean if you use an Air Fuel computer to lean your mix out wont the ecu inevitably try to recompensate until it throws an error code?
Sorry to ask so much in one post but im confused
Thanks