boostek9

iTrader: (1)

I have a new GM map sensor I bought 2 years ago and never used.
Part# 12569241
I found out that this is a 2 bar from GM

What scalar settings for the Hondata s300??? Is it the same as the 3 bar and motec 3 bar??

dreadcivicturbo

test the voltage of the map sensor pluged in with the ingition on. then select the one in hondata thats closest to your map sensor..... i think Neetronics is 2 bar

mrbsponge

the 2 bar you have looks just like the GM 3 bar but i dont think you can use the 2 bar. if its a 2 bar why not just use the stock unit, the stock one is a 2 bar as well. 1 br of vacuum 1 bar of boost.

Semnos

There you go.
I had one of them to.

Manifold Pressure
(relative sea level / absolute) 2 Bar
MAP Output
14.31psi / 29.01psi 4.90V
14.00psi / 28.70psi 4.84V
13.00psi / 27.70psi 4.67V
12.00psi / 26.70psi 4.50V
11.00psi / 25.70psi 4.33V
10.00psi / 24.70psi 4.16V
9.00psi / 23.70psi 3.99V
8.00psi / 22.70psi 3.82V
6.00psi / 20.70psi 3.47V
4.00psi / 18.70psi 3.13V
2.00psi / 16.70psi 2.79V
0.00psi / 14.70psi 2.45V
5.00inHg / 12.24psi 2.03V
10.00inHg / 9.78psi 1.61V
15.00inHg / 7.33psi 1.19V
20.00inHg / 4.87psi 0.77V
25.00inHg / 2.41psi 0.35V
29.10inHg / 0.40psi 0.02V

boostek9

iTrader: (1)

do you know what scalar to put in for the Hondata settings?

Spunkster

Here is how to calculate the scalar and offset for a MAP sensor.

1. Find the minimum and maximum voltage and absolute pressures.

2. Convert the pressures to mbar.

3. Subtract the minimum and maximum voltages to find the range, then do the same for the pressures.

4. Divide the pressure range by the voltage range to calculate the scalar.

5. Multiply the minimum voltage by the scalar to calculate the offset. Note that a positive voltage gives a negative offset.



Example for a 3.5 bar MAP sensor:

1. For a 3.5 bar data sheet:
0.5V @ 0 kPa (absolute)

4.5V @ 345 kPa (absolute)



2. 345 kPa = 3450 mbar.

3. Voltage range = 4.0V, pressure range = 3450 mbar.

4. 3450 / 4.0 = 862.5 = scalar

5. 862.5 x 0.5 x -1 = -431.25 = offset

So scalar = 862, offset = -431

Plug in the minimum and maximum voltages to check your work:
0.5V x 862.5 - 431.25 = 0 mbar @ 0.5v

4.5V x 862.5 - 431.25 = 3450 mbar @ 0.5v



If you have trouble then draw a graph and extrapolate the lines until they cross the pressure axis.

PrecisionH23a

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrbsponge &raquo;</TD></TR><TR><TD CLASS="quote">the 2 bar you have looks just like the GM 3 bar but i dont think you can use the 2 bar. if its a 2 bar why not just use the stock unit, the stock one is a 2 bar as well. 1 br of vacuum 1 bar of boost.</TD></TR></TABLE>