"Powell, Ken" wrote:

snip.............

Paul,

I believe this turbo-compound idea was the one that got me jazzed about the
ACRE website. I have since cooled off a little because I never got an answer
from you on how you will isolate all that heat from the PSRU and possibly
rear housing? Ceramic blanket?

Another question that Paul Carey or Lynn would probably know the answer to.
What is the maximum line speed the tooth belts that run the superchargers
operate at?  Assume engine rpm is around 10K

Thanks

Doug in Japan

It would add length to the engine anyway so a a thermal blanket of some sort is not
out of the question.

Paul Lamar

Doug and Paul,
This is a question more than an answer - how much HP do crank driven centrifugal superchargrs use/xmit in order to spin the impeller?  Do the HP and RPM ranges of these units fit the TC application?
  It would seem that the HP and rpm requirements would be similar.   All of these systems use an internal reduction drive in addition to the crankshaft belt reduction.The drive system for these is
well proven and might be applicable to this application.  The Vortech uses a gear drive, Paxton uses a gear drive but used to use a planetary ball drive, Powerdyne uses a belt drive, and ATI
Procharger uses a gear drive.
Here is an interesting quote from the Paxton web site: 'In 1956, McCulloch set up a special automotive division, Paxton Superchargers..., to handle the supercharger division. The same year the
company changed the name of the ball drive supercharger to the VS-57 and developed a new variable rate supercharger called the VR-57. The new supercharger incorporated a variable rate internal
planetary drive ratio that could alter the step up ratio from 3.5:1 to 5.5:1. The variable rate was achieved by a spring pack that would change the distance between the ball races based on RPM. The
supercharger experienced a one-year victory in NASCAR causing officials to ban superchargers in the sport. The supercharger was most notably used as the F-option on the 1957 Ford Thunderbird (211
produced).'

Ken Powell

Up to 30 HP or so.

We discussed this at length awhile back. Search the old messages.

Everything designed after 1930 is banned in NASCAR.

Paul Lamar
 
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