Yep, that is also the thing to do on a Impreza LInkECu,
THe map area need to be rich in the low load high rpm, then you will get rid if the liftoff jerk,
I worked alot on the with the NA Toyota 4age20 blacktop , when running Open ITB´s on speed density,it was really jerke, but found that the low load rpm need to be rich, that will make the difference, you look for.
/Skassa