How mcuh should be A/F between shifts ?

[wesam]

I want to know how much the A/F should be between shift ( when shifting in M6 car at 6800 rpm there is a short period of time the map goes to 15-20 kpa )
i want to know how much A/F should be in this area is it 12.8 like wot or is it 14.6 like cruise ?

[WeathermanShawn]

wesam:

I keep M6 DFCO Enabled, so my AFR briefly goes to ~20.9 AFR during WOT shifts.

If you are doing AUTOVE that is a tremendous Throttle Transient that should be filtered out.

I think it is nearly impossible to tune that area anyway. Without M6 DFCO Enabled, Fuel Dynamics (Wall-Wetting, Evaporation, etc) may ultimately determine the actual AFR. It may actually go richer as you let off the throttle, then briefly lean as you stomp.

Bottom line is I believe it is virtually impossible to 'tune'. I have been running M6 DFCO for over 30K, with no WOT problems. In essence you may not need any injector flow during a shift.

Or you trying to tune that area, or is this more of a hypothetical question?

[wesam]

I just want to know which will be better in this area as i can lean/rich the 15-20 kpa columns at high rpm
also my dfco is not enabled in this area maybe because speed shifting (0.3 sec)

[WeathermanShawn]

If you are trying to tune High Rpm/Low MAP (very difficult to do correctly)..then you are better off taking your vehicle up to 6800 Rpm in a slow deliberate fashion and then in the same gear let the throttle go to 0% (No DFCO).

Answering your question in that fashion you would maintain the same stoich value (14.7 AFR) as the the remainder of the 'no-load' portion of your VE Table.

I don't think you will ever be able to nail it on a .3 second shift, but 14.7 would be the answer.