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Old 02-25-2008, 03:22 AM   #38 (permalink)
trebuchet03
MechE
 
Join Date: Dec 2007
Location: Bay Area
Posts: 1,151

The Miata - '01 Mazda MX-5 Miata
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Quote:
Originally Posted by DifferentPointofView View Post
I don't know about this. But has anyone thought of using a supercharger? From my "tuner car" knowledge, most turbo's make power at the higher end, while superchargers make power more at the lower end.

I could be wrong though, and I'm not much up on how superchargers have an effect on FE, so please correct me if I'm wrong.
Reiterating zjrog's post...

SC do not recycle power - the use power putting a load on the engine.
Exhaust driven TC recycles waste heat into usable work.

Variable geometry turbines solve some of the issues with operating range. But if all you want is low end boost - use a small turbo

Then... There's the Comprex supercharger... Which uses exhaust pressure to directly compress intake air... And synchronized by a pulley. The pulley isn't used to compress air, so you don't have the power consumption of a supercharger. Calling it a supercharger is a bit of a misnomer, but eh...



The only production car to ever have one was a Mazda Capella (think 626) Diesel.
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