[TR] Building a 150 hp engine

Randall tr3driver at ca.rr.com
Thu Jul 19 20:22:01 MDT 2007


> Just ahead of the throttle plate is a large bypass valve controlled by
> intake manifold vacuum.

Ah, I thought it might be something like that.

> Another someday project is to incorporate a Hobbs vacuum switch and an
> electronic timer that would engage the supercharger like a 
> passing gear.
> What do you think?

Sounds like a great idea to me.

OTOH, I believe the power consumption of the blower with the bypass valve
open is minimal.  Might be simpler to just leave the blower turning all the
time, and let the bypass valve deal with kicking in when manifold vacuum
drops.  I believe that is how the Moss setup works (definitely the way their
setup for the Miata works).

Then I would probably want an override switch for the bypass ... <G>

Thanks for the explanation, Rick.
Randall


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