Super chargers + MAP

[Gary Derian]

If you take the throttle as a variable orifice, and assume 1 atmosphere on
the air cleaner side, you could determine air flow by knowing the throttle
angle and vacuum, an alpha-density system.  Any VE changes in the engine
would affect vacuum at a given throttle angle and would be measured.  I
think this would even work with a compressor bypass for improved part
throttle efficiency.  MAP alone is not enough, you also need throttle angle.

Gary Derian <gderian at cybergate.net>


>If the supercharger is between the throttle body, and engine, wouldn't
>a 1 bar MAP work just fine if it picked up the signal at the base of
>the throttle body (reguardless of boost?).
>  Granted a 2-3bar MAP could have better resolution.
>Anybody see any downsides to the first sentence
>Bruce