From: John Herrera
> Another difference between turbochargers and superchargers is that
> superchargers compress the intake air after it is mixed with the fuel,
> and turbochargers compress the air before it is mixed with fuel. On
airplanes anyway.
I've seen it done both ways on cars; in fact somewhere I have a book talking
about the advantages and disadvantages of using turbos in "blow through" or
"suck through" carburetor configurations. One problem with configuring a
turbo for "suck through" is that it must have seals capable of handling the
vacuum created when the throttle plates are closed (like at shifts & cruise
conditions). Apparently most turbos don't have such seals. And when they
do have the seals, the seals are troublesome. But that book was written a
long time ago, so that may no longer be true today.
Probably a different book, but I've also seen a photo of a Paxton
belt-driven supercharger (which used a turbine compressor) blowing into a
carb.
> Seems to me that superchargers on fuel-injected car engines would compress
the air before
> it is mixed with fuel, but what do I know?
Certainly for port or direct injection. But maybe not for TBI ?
Randall
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