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From: klein@ucbcad.UUCP
Newsgroups: net.auto
Subject: Re: Re: superturbochargers
Message-ID: <188@ucbcad.UUCP>
Date: Wed, 17-Apr-85 13:16:25 EST
Article-I.D.: ucbcad.188
Posted: Wed Apr 17 13:16:25 1985
Date-Received: Sat, 20-Apr-85 03:27:51 EST
References: <541@hou2e.UUCP> <2494@drutx.UUCP> <2505@drutx.UUCP>
Organization: UC Berkeley CAD Group, Berkeley, CA
Lines: 19

> Since a supercharger is belt driven, they take engine power to run.
> A supercharger works well at idle speeds, unlike a turbo. I turbo is
> driven by exaust gases, using only wasted engine power, not usefull
> engine power like a supercharger. (there was an article in one of
> the car mags. this month, I forget which one. If there is enough
> intrest, I'll post the which one.)
> 
Careful here.  A turbocharger, unlike what the above seems to imply,
does not get you something for nothing.  BOTH take engine power.
They just take it from different places.  A turbocharger reduces the
power by interfering with exhaust flow and increasing exhaust pressure.
A supercharger reduces the power by mechanically loading the engine.
But in both cases the power is boosted by the action of the charger, so
hopefully the benefits outweigh the penalties.
-- 

		-Mike Klein
		...!ucbvax!ucbmerlin:klein	(UUCP)
		klein%ucbmerlin@berkeley	(ARPA)