Checked out the tuning bible and follow the tuning procedure.
Basically, the bible works fine, but I think the article pin point to buggy engine.
My onroad engine can run pretty after the tune, but there always a lean bog out from corner.

My question is,
- How u guys tune the .21 engine? Lean HSN and slightly rich LSN?
- Regarding lean bog out from corner, do i richen up the HSN or rich up the LSN? Richen up the HSN gave me headache on acceleration.
- How is the proper LSN tune for on road engine?
My engine is F.21 PT