VMAP4 to Bosch PT graph confusion

[Dan Cordon]

> I am confused by these graphs for VMAP comparison to Bosch?
> 
> http://members.cox.net/urs6/VMAP4.features.htm
> 
> The are supposedly comparing to Bosch sensors. 
> 
> I would be expecting voltage vs. abs. pressure, but both axis show volttage.
> 
> Can some of the enlightened clue me in?
> 
> TIA
> 
> Ben

It looks to me that these charts are comparing the output of three 
common sensors to that of the VMAP4. So, say you already have a great 
fuel map based on a Bosch 2.5 bar sensor, and want to install a VMAP4 at 
3.1 bar. You'd have to adjust the values of your current map  by the 
difference noted in the yellow line on the bottom chart.

But for those of us who may start out with a VMAP4 from scratch, having 
the voltage output vs. abs pressure would be nice to have. I'm sure it's 
out there though.

Once I sort through my 200 20v, I may look at these instead of the now 
rare Bosch sensors.

-- 
Dan Cordon
Mechanical Engineer
University of Idaho - Engine Research Facility