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Message: <blockquote data-quote="Rednaxs60" data-source="post: 231475" data-attributes="member: 4617">Follow-up on the above post.  The Injector Close Angle is ATDC.  It is recommended that this parameter be calibrated after the engine VE table is well calibrated.  As mentioned above, once the VE table is well calibrated and you decide to calibrate the fuel injector close angle, you may have to adjust the VE table calibration.  Will be doing research into this because it would make sense to do an initial calibration close to what is needed, then continue with calibrating the VE table.  Have a spare engine, don't ask, and I will be determine when #1 cylinder intake valve opens (use a degree wheel) so that an initial fuel injector close angle is determined and used.  I would expect it would be correct to have the fuel injector close angle such that fuel injection is finished before the intake VV opens, or as close as possible, knowing that fuel does not stop immediately once the fuel injector pulse width is finished.  The fuel injector close angle will change with varying engine power ranges.  The benefit of this parameter is at idle and low power levels.  The injector close angle at high powers/engine RPM its not as critical because the time between fuel injector pulse widths happens so quickly that the fuel injector is probably more open than closed.Cheers</blockquote>