[Diy_efi] Early Mitsubishi EFI tuning

[Steven P. Donegan]

GM MAF frequencies are different than what you describe for the vehicle
you are working on - they go to 10k HZ on the really large ones used on
current year Corvettes. My unit I believe tops out sub 8k HZ - haven't
the car that wide open yet :-) The hardware I designed could likely be
used for your application - the programming would be up to you - it's a
20 MIPS microcontroller with adequate performance for you to do whatever
you'd want to.

On Sun, 2006-10-08 at 11:42 -0500, The AirHawk wrote:
> > 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). 
> 
> 
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