[cookiesowns]

What you feel is most likely the overboost coming in. It gives about a +3psi shove. The base car is tuned for about 11-12psi at 70F Ambients at about sea level. With overboost it hits about 13-15psi between 3000-5000rpm. There's usually a delay before it activates and that's what you're feeling.

On a 6MT there is anti-lag between shifts but you have to be "quick" enough. Having overboost also pronounces this if you aren't quick enough.

Many tuners out there because of the burble settings essentially disable this "antilag" feature to keep the turbos spooling. Between shifts without this disabled i can hold roughly 10-12psi and get instantly 12psi as soon as I'm back on the power.