[Diy_efi] Early Mitsubishi EFI tuning

[The AirHawk]

> Well, Interceptor is a generic term used by the Oz folks mostly -
> devices which intercept signals from car sensors, apply some logic to
> them and present the changed signals to the original car EMC. The one I
> designed is here: https://www.microvore.com/interceptor.jpg
>
> If the MAF does frequency output my board may well do the trick - it
> also has analog inputs but no analog outputs at present.

Yes, that's pretty-much what I thought it was. I saw your gizmo a while back when you posted about 
it. Clever.

The Mitsu Karmaan-Vortex MAS is a freq-output device; turndown range is a few-hundred hz to about 
3khz, low to high flow (depending on unit). Has an integral baro and temp sensor on the inlet side, 
for ambient air-density compensation.

There is a small company that makes an analog-to-freq box for using a GM MAF in place of the Mitsu 
Karmaan sensor, mostly for those who want to run the sensor close to the throttle-body, and dump the 
compressor discharge to atmosphere on closed-throttle (causes a bit of a richness problem with the 
stock Mitsu setup when you do that).