Fuel prices / efficiency

[Daniel Ciobota]

I have had a street type (1" tube size) bypass on a fairly low boost application
(10-11psi), and it solved a lot of driveability problems I had with the car.
Honestly, the s/c drag on the motor is vastly overrated, especially for centrifugal
blowers that measure 15lb of boost or less.  I ran the car with the belt attached to
the blower, and the belt off, and mileage wise it didn't seem to make any significant
difference.  This was on a car that registered approx. 480hp at the rear wheels, and
still managed around 22-23mpg on the highway.

 Caveat:  some of the older blower designs, like the paxton ball drive, take up a lot
of power to overcome the ball friction.  The blower I used was a powerdyne blower,
which has dry ceramic bearings.  If you spin it by hand, it feels like it has almost
no friction whatsoever.  YMMV.

Daniel


Aaron Willis wrote:

> At 04:28 PM 2/18/00 -0500, you wrote:
> >> -good excuse for installing a supercharger - payback is sooner at those
> >gas
> >> prices!
> >
> >Wrong charger, Turbocharger.  Supercharger is always a drag on the engine,
> >only at times does it's benefits outweight its drawbacks.
> >Grumpy
> >
>         Any opinion on S/C bypass valves?  Eaton claims that with the installation
> of one on their blower, parasitic drag is hugely reduced and IIRC something
> like a very few HP are actually consumed under non-boost conditions...?
>
>         Aaron Willis
>         Garage TE51 International  http://surf.to/garage-te51
>         ICQ # 27386985
>         AOL IM: hemiyota
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