Cant keep in mind what the B is, but TDC is Leading Lifeless CENTRE for for timing. All 20V's, no matter if on the Coastline or highveld ought to have a btdc of ten deg. Meaning your inventory timing really should be set at 10.4AGE 20v ITB vacuum Guidelines on Intecracing.com can't help with all the rest of the pipeing as it's kind of baffling but