In modern motorcycle engines they use big "pre-chambers" before the
   intake tubes. Such a chamber in a 1200cc Motorcycle can have a
   volume up
   to 4500 cc. And this is really only for tuning (not for air
   filtering) and helps a lot getting out 175HP from a 1200cc
   production bike.

   Reiner Nikulski

   Unfortunately it confuses the heck out of the carburetor.
   I am about to give up on any kind of venturi sensor.
   The automotive industry did it years ago.

   Paul Lamar ...No rotor no motor.




This is also one of the reasons that even a low pressure version of the
direct injection has merit. If we want better economy we need to avoid
spraying the surrounding environs with fuel! This is also the reason that
most modern cars/bikes/boats use large air boxes to contain the
reversion mist if carburetated.


Bill Jepson

Well I had fully intended to do that but I don't think it will
stop the mixture instability of the air flowing  back and fourth through
a venturi. I could be wrong.

Paul Lamar ...No rotor no motor.

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