Which is why, of course, we see secondary butterflies in the induction side of race cars, funny cars, etc., etc.
I cannot tell if you are making a joke or not here Alex. Well, you are making a joke but I cannot tell if it is on purpose or not.... :-)
I know the camp out there that sells ecu- reflashes proports that leaving the 'flies in the bike somehow produces more power, and that is all fine and well, but not only does it not withstand the test of science (partially blocking a tube will not yield MORE fluid flowing in a that tube) but it also does not pass the simple test of logic.... if closing down the intake passages yields more power, why does the re- flash open them further / sooner in the first place? Sorry, it is just the usual sales speak about how an inferior [product / method] is really better than the superior product / method.
In the end, power is derived from how much air flows through an internal combustion engine. Things that allow or cause more airflow, such as less restrictive air filters, more free- flowing exhausts, etc., as well as changes in valve timing and opening, all combine to increase horsepower. All except for the magical 'flies of course, which increase horsepower by restricting airflow.
Re- flashing an ECU on a C-14 can have a positive effect on performance, and it certainly is easy for a C-14 owner to do this but in the end it will not equal removal of the 'flies and compensatory fuel adjustment (re- flash the ECU or add a separate fuel management device such as a Power Commander, etc.). But hey, whatever it takes to sell something has always been fair game.... back in the 50's, there were doctors (bona fide M.D.'s) hawking the best cigarette for health too.
Brian
News flash: most tuners including Ivan from NY produced more power with the flies in.
Even Area P received 20 hp gains with flies in.
Ivan tuned my 2013 ZX14-R. . .fastest bike on the planet