turbo/supercharging

[FJB203 at aol.com]

In a message dated 97-03-21 19:32:09 EST, you write:

> Your engine has to work harder to get the exhaust out.  For ex: A 3.0L @
>  6000rpm w/ 1.0 bar boost and assuming 100%VE takes about 20-22kW of power
>  compress the air.  Neither a SC or TC is perfect (I seem to remember
60-80%
>  over a wide range) so your up to 25+kW.  This power comes from somewhere.
>  A SC takes it from the crank directly and a TC from the exhaust pressure.
>  Granted, the ~20 horses you lose will get you another 200+, so the net
gain
>  is worth it;)  

Right on... the same theory applies for supercharging, except instead of
restricting exhaust flow, the charger bolts directly to the crank via a belt,
robbing the horsepower from there, also making a huge gain overall.

Frederic Breitwieser