How much the A/F should be when releasing throttle after hard acceleration?

How much the A/F should be when releasing throttle after hard acceleration?
I mean in Manual transmission cars between shifts the MAP goes to 15-25 kpa
so in this area how much the A/F ratio should be ?

Mine spikes to 20.0 AFR..DFCO..:grin:..http://forum.efilive.com/search.php?searchid=941785

so my car should be recalibrate because I'm seeing 12
but i want to know what is the ideal A/F for this area

Are you saying during shift (clutch-depressed) or after clutch released, but no throttle.

Neither needs to be tuned. DFCO turns off injectors on M6 during shift..http://forum.efilive.com/search.php?searchid=941790.

If you get a richer AFR after shift, but foot off throttle..thats momentary. Called rich decel..http://forum.efilive.com/search.php?searchid=941792..

DFCO you can turn on and off (see links). The other would have to be tuned via transient parameters. (see links)..:)

EDIT: Stoich would be ideal..but there is so little cylinder air, it is virtually impossible to decrease the injector pulse width below its minimum. Thats why most tuners don't chase it. But, if you are really curious 5.7ute has novel ways of tuning that area.

I meant when clutch-depressed and no throttle what is the ideal A/F ?

While technically 'stoich' is ideal..since there is no load on the engine, and very little cylinder air..no fuel is required.

I say on a M6 enable DFCO B3308. It momentarily cuts off the injectors..

I do not believe there is any other way to manipulate fueling during a M6 shift other than B3308..

i look in my tune it seems that the DFCO is not active since the B3308 DFCO enable temperature is 140C
i will try to enable it will i need to tune any thing else after decreasing the temperature ?
will the car go very lean ? its running in open loop sd

Its totally known as 'tuners option'. A lot of tuners when utilizing AUTOVE for SD Tuning, disable DFCO. That is to not have the brief interruption of the fuel injectors effect the RPM/MAP wideband readings while tuning AFR.

A number of tuners after completing AUTOVE leave DFCO disabled. Probably an equal number of tuners re-enable DFCO. Its true you go 'lean' for a moment. Its also considered no-load on the engine..a total waste of fuel to spray 1/2 second of fuel while shifting..and the engine does not need it.

The bottom line is its your option. Personally on my application, I leave DFCO enabled, including during shifts (M6 DFCO Temp: 50C). As soon as you hit the throttle Commanded AFR only takes 1/16 of a second to re-engage. If you stay rich during throttle shift, most likely you hear a quick 'pop' as any unburnt fuel during shift blows out the exhaust pipe.

The bottom line is that I have not heard of anyone who can alter the AFR during a M6 shift via any tuning method other than DFCO. I would just do a search on it and make up your own mind. If you are in the active process of AUTOVE..leave it disabled..

Good luck with your search..

Shawn i'm glad for you for that explanation
and thanks a lot for told me to leave it deactivated while i'm in the AutoVe tuning

so is it useful to try to lean those spots after making a log for the car ?