Need help with a F1 turbo debate.

[izybluffen]

I'm having a debate with a chap about the F1 turbo era and need some help.

Main points are:

Teams did/did not run full boost in race trim, which I say they didn't.
Drivers had a "boost button" to increase boost to help overtake and defend.

I'm pretty sure I'm right about this but want some extra evidence and assurance.

[MuseF1]

Teams didn't run full boost during the race, but they did have a button to occasionally take it to full boost for fast laps and overtaking. I think mainly that it was due to high fuel consumption at full boost, and i imagine there were reliability concerns too

[izybluffen]

Thanks.

[rjsa]

You can see the boost knob in the right edge of the pannel here: