Ok so I am new to datsun 1000s and I have just purchased Davids little red wagon which is supposed to arrive on Monday! (so excited!)     
 
I am also reasonably new to cars aswell, most of all my research has been here, online. I have a fair idea on the basics of how engines work and what parts do and all the internals etc etc etc I just lack hands on experience.
 
Anyways I thought I'd just prepare you with my limitations before I throw this possibly obvious-answered question out there...
 
Question is:     (ok it's not a question...)     I have heard people saying that turbocharging is somewhat more efficient over superchargers (Roots, Twin or Cent.) but in regards to where they source their energy to spin.... I've seen in discussions people say that 'Exhaust flow is wasted/free energy, that's why turbochargers use minimal energy to spin.'
 
And ofcourse the following, 'Superchargers are belt driven thus suck usable (more than turbo) energy from the engines rpm...'
 
Sorry if this makes no sense, best way I can explain it....
 
 
 
But with a turbo, I would have thought that the energy from the exhaust going through the exhaust turbine side of the turbo is still sucking energy from the engine as it's a restriction of flow... and technically the restriction of flow is equal to how much air is being compressed through the intake side? 
 
So with a supercharger, the same restriction to the engine is how much energy it takes to compress the intake air, plus the little energy to actually free spin the 'turbine' things...?
 
Is this making sense?
 
What I am trying to ask is, isn't the only REAL difference the efficiency of design in both turbo and sc?
 
 
Correct me if this isn't even an issue and people don't say these things and that I read their reply wrong??????
 
 
Thanks guys,
 
Matt

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