ok, I’ve found this
that clears any doubts about all the blowing, and states there are three types
-> just blowing, perfectly legal, it won’t be banned before 2012, so it doesn’t matter
and 2 more types of blowing, both related with off-throttle:
-> cold-blowing, off-throttle “although fuel supply and ignition are cut, airflow through the exhaust (…) continues.(…) the exhaust is still ‘blowing’ into the diffuser, but that airflow is now ‘cold’ since no fuel or ignition is involved.”
-> more advanced hot-blowing, where “continue to inject some fuel through the engine’s valves into the exhaust. This fuel ignites on the hot exhaust, increasing the amount, speed and temperature of the airflow exiting towards the diffuser.”
so, what Itchyes had written, but with a reliable source.
What I still can’t find is somewhere that tells which teams are doing what (which are hot-blowing, which are cold-blowing, which are only blowing on-throttle and which don’t have blow at all, if such a monster exists), no sources besides the original wikipedia page that says the Cosworth teams, Sauber and Toro Rosso are neither cold nor hot-blowing.
What is missing also is the reliability of that 1 sec. difference the wikipedia page talks about; maybe it’s less, maybe it’s more (and of course depends on the track).
So, despite thinking like Ned, Itchyes, PM and Fixy that it won’t change very much, that’s only a gut feeling. The fact of the matter is that the sources we have gathered so far and connecting the dots, say otherwise.
So, finally, can someone please find some reliable source that says what kind of blown diffuser each team is using and what time advantage(in average) each kind of blowing has over the others? Please, so I can sleep more relaxed?