Off throttle gases - without engine maps

[Shrieker]

Not quite along the thread discourse, but on topic for the title=)

It seems that teams now play with engine blowing during downshifts. There were videos from Australia with a loud noise during downshifts from Ferrari, and now there's videos of recent pole lap of Nico Rosberg, and you can hear bursts of noise that coincide with his downshifts.
So I guess teams started to use throttle blips to maximize exhaust flow during braking.

That is interesting, David Croft was raving about Rosberg's late downshifts today.

[Cuky]

That is interesting, David Croft was raving about Rosberg's late downshifts today.

Well I have noticed that too on onboard shots from both Rosberg and Hamilton. They wait almost until they start to turn in to the corner and than quickly shift down to the preferred gear

[autogyro]

Perhaps they could employ a gardener to sit on the gearbox with a leaf blower and aim it at the diffucser?
Would that be against the regulations, or would there be yet another 'gap' in them?

[bhall]

Perhaps they could employ a gardener to sit on the gearbox with a leaf blower and aim it at the diffucser?
Would that be against the regulations, or would there be yet another 'gap' in them?

The regulations allow up to 50ms between driver input ("torque demand") and the resultant engine response (5.6.1), and they allow "ignition base offsets" to be applied when the engine is above 80% throttle and above 15,000 RPM (5.6.6), ostensibly to keep engines from bouncing off the limiter.

So, I think current off-throttle exhaust blowing means having a map that both retards ignition as permitted by 5.6.6 and uses the delay allowed by 5.6.1 to keep RPM up for as long as possible on corner entry. Combined with a Helmholtz chamber to tune the Kadenacy effect of the exhaust, there's still significant room for off-throttle sorcery. Or so my dime store logic tells me.