GMC thingee - De-activation clutch - Enter MAD MAX setup....

[Todd....!!]

Hello Gary, makes sense to me....

In ONE of the Mad Max movies, he had his car setup to run on some sorta
econo engine(Lack of gas in the future and all, was a MUST) then,
whenever a bad guy came cruisin for a bruisin, he'd flick one switch and
the BIG motor woudl crank up, then, I believe he'd flip another switch
once he caught up to the bad guy, this second switch activated his
blower clutch, and whalaa, he'd catch the bad guy and run em over or
somethin....

They actually showed the vlower engage from a front view camera...

It was SO COOL!  If ya haven't seen it, I suggest ya check it out, I
believe it was one of the first 2 Mad Max's movies where this feature
was shown....

Later....

Todd....

----------

Gary Derian wrote:
> 
> Any supercharging device requires a reduction in compression ratio to limit
> detonation.  That also reduces the expansion ratio which is where all the
> power and economy comes from.  Crank driven superchargers are stuck with the
> low expansion.  Turbine driven superchargers increase the expansion ratio at
> the same time they increase the compression ratio.  This makes them
> inherently more efficient while running boost.  Crank driven is OK for short
> bursts of passing power if coupled with a de-activating clutch so parasitic
> losses can be eliminated during cruise conditions.
> 
> Gary Derian <gderian at oh.verio.com>
> 
> <snip>
> > Turbo and other devices still impose loss's on the system - you would be
> > amazed how much of a restrictive loss that turd up your tail pipe is.
> Unless
> > you sell Pogue carbs - TANSTAAFL  ( There Ain't No Such Thing as a Free
> Lunch
> > - Heinlein ) applies and granted overall its less than the roots pumping
> loss.
> >
> > But for fueling purposes, the roots tracks closely to a greatly increased
> > displacement NA engine.   Most OEM EFI stuff can be set right over the
> blower
> > and not even suspect its blown - if they can flow enough fuel to match the
> > air.  And the pulsing of a long duration cam is eliminated also - making
> it
> > easier.  And no sharply rising pressure curve to compensate for either.
> The
> > ease of fueling was part of the reason that turbos did not make major
> inroads
> > until the 80's.