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- From: v058l789@ubvmsb.cc.buffalo.edu (Ethan A Bowerman)
- Newsgroups: rec.autos.tech
- Subject: Re: Supercharged vehicles
- Message-ID: <BuDG3L.E52@acsu.buffalo.edu>
- Date: 10 Sep 92 16:50:00 GMT
- References: <1992Sep8.161221.28786@athena.cs.uga.edu> <1992Sep09.220337.4671@lobo.rmhs.colorado.edu>
- Sender: nntp@acsu.buffalo.edu
- Distribution: rec.autos, rec.autos.tech, rec.autos.sport
- Organization: University at Buffalo
- Lines: 45
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-
- In article <1992Sep09.220337.4671@lobo.rmhs.colorado.edu>, seanr@lobo.rmhs.colorado.edu (Sean Reifschneider) writes...
- >In article <1992Sep8.161221.28786@athena.cs.uga.edu> dug@athena.cs.uga.edu (Douglas Brown) writes:
- >>Does anyone out there have any comments on these. Are they good? Are they
- >>bad? Compared with a turbo charger? What does everyone think?
- >
- >They're not new... A turbocharger is just an exhaust driven supercharger
- >as opposed to an engine driven one. In fact some literature associated with
- >the Ford Probe is kind of hard to read because it said 'turbocharged/super
- >charged'. I finally found they were just repeating themselves.
-
- Agreed- a supercharger is anything that put the intake charge into
- the intake at a higher than atmospheric pressure. Ram-air is supercharging
- of a sort.
-
- >Since a Turbo runs off of the exhaust, it's esentially running off of waste
- >energy. It costs nothing, but takes a while for it to come online when the
- >exhaust pressure builds up.
-
- Wrong- it does cost something- it constricts the flow of outgoing
- exhaust gases. As a result, it makes less power on the top end as
- opposed to a "traditional" (belt/gear driven) suppercharged engine running
- as the same boost as fuel economy.
-
- >An engine driven supercharger is driven by the engine, hence it's always
- >online. There is no supercharger lag like there is turbo lag. But it's
- >always drawing power from the engine, and so it uses up more gas. I always
- >thought they should use a clutch on it so that when you don't want it on,
- >it isn't. Ot just have the clutch engage when the throttle is open a
- >cartain percent...
- >
- >Would an electronic clutch work for this?
-
- Yes, an electronic clutch would work- but it would be prohibitivly
- expensive. You can't have JUST a clutch- the clearances within the
- supercharger are not adequate for much air/fuel mixture flow. You would need
- a seperate intake path for when the 'charger isn't running.
-
- All in all- a turbo is the best supercharger for a street aplication.
- For a drag strip- it is "traditional" superchargers all the way...
-
-
-
- Ethan
-
- >Sean
-