Correct.
And I don't think it is when foot braking - loading the converter for launch - but the times I was doing that I wasn't looking at the vacuum gage.
But when leaving the line from idle or close to idle, then maybe there's some vac advance for a fraction of a second. But that would be the same fraction when the engine isn't fully loaded. Never paid attention to the vacuum when leaving that way either. LOL.
Some of the guys who do more racing can chime in on this.
