Super chargers + MAP

[Tom Sharpe]

Bruce Plecan wrote:

> 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

Don't do it,  Get the 2-3bar. At WOT as boost comes on, the MAP will see
vacuum at the compressor inlet that will increase with RPM. It will take a
really strange fuel curve to run right...... maybe a 1 bar map on both
sides with programming to identify boost.

Another thought.   How about someone building a air speed meter... measure
the speed of the air entering the engine/turbo/throttle body,etc. and
using that to determine flow.  or just build a non restricting air flow
measuring device. Is there something in the aircraft arena that will
work???