Re: Pressure Sensor Curve

[Dave Lawson <dlawson@ball.com>]

> Has anyone characterized the pressure sensor
> voltage-pressure curve for the MAC-01 computer.
> This would save me about a half hour work.  If
> not I will do it this weekend and post the results.

I have finally found my notes from 3 years ago when we
characterized the TQC pressure sensor output voltages.
We wired up a DVM to the ECU and 3 of us went for a ride.
The driver watched the boost gauge, co-pilot watched the
DVM and back seat recorded the data. We recorded  a
couple of readings for each pressure step. The car was
an 83 TQC with adjustable boost regulator and stock
MAC-02 V1 ECU.

Pressure      Voltage
(psi)
 -18 inHg        0.005
 -12 inHg        .18-.2
0                      1.2   1.3
1                       1.5  1.52
2                       1.78  1.75  1.67
3                       1.9  1.88
4                       2.15  2.15
5                      2.38  2.33  2.26  2.3
6                      2.6  2.5
7                      2.7  2.68  2.75
8                      2.9  2.91  3.0  2.87
9                      3.12  3.05
10                    3.25
11                    3.56  3.45
12                    3.7  3.65
13                    3.9
13.5                4.0  3.97  3.9  3.87

 -
Dave Lawson  dlawson@ball.com