> Yeah, turbochargers run at much higher RPMs than superchargers, so
> most of it's noise is above the normal human hearing threshold. They
> bug dogs more than humans... ;-)
>
> The idea is the same - use a turbine to pump more fuel / air mix into
> the engine at higher speed. The supercharger runs off the crankshaft,
> and the turbocharger runs off exhaust pressure. Superchargers are less
> fuel efficient, but they provide more power and provide it faster than
> turbochargers (turbochargers always have a "lag time" while the
> pressure builds up, superchargers come up to speed as soon as the
> engine does).
>
> On Sat, May 30, 2009 at 10:53 AM, Paul Bowers <[hidden email]> wrote:
>> I'm a relative newbie to superchargers, but you can hear the whine quite
>> easily. It's quite impressive, I saw/heard it in Montreal during trials.
>>
>> Amazing sound.
>