snips...

I guess while we are on this subject, what would be an optimum termination
for a NA system?  If the tubes are the correct length, how would you avoid
making a dynamic chamber if you are using a single throttle body?  Or

would

you use multiple throttle bodies?

Dan--

The big difference between a plenum and a dynamic chamber is the
volume. If the volume is equal to or greater than the displacement
of an equivalent  four cycle engine it is a plenum. Rule of thumb.
Interaction between rotors should be minimal. The 13B two rotor pumps
roughly
the same amount of air as a 160 cubic inch four cycle piston engine.
Therefore the plenum should be 160 to 180 cubic inches.

The dynamic chamber is little larger than a section of the pipe.
Really it is just a T.

A single throttle body on an adequately large plenum should work but
perhaps not as well as a separate slide throttle for each runner as
used on the Lemans engine.

Paul Lamar

Dan Ruggirello wrote:

Oh I forgot,  Thanks for the information on the optimal termination.

Dan

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