Calculating boost pressure

[mtxpert]

From what I understand in order for me to get a boost pressure reading I need to calculate the boost reading from the MAP minus the Barometric pressure reading.
Does the script API recognize IF statements?
var AbsolutePSI = OBii.GetPidValueMetric("SAE.MAP") - 2.45 / .17 ###converts voltage to PSI above 0 PSI####
var Barometric = OBDii.GetPIDValueMetric("SAE.BARO") *.14504 ###converts Barometric KPA to PSI####
var BoostPSI= AbsolutePSI - Barometric

The key here is that the above will readout some weird readings when it's in vacuum.
I really need an if for when voltage is below 2.45V.

Any ideas?
Mike

[BrianP]

Yes, absolutely!

Since it is Javascript, you can use any valid Javascript code including if/else, for, while, etc. Here's an example:

Code:

var AbsolutePSI = Obdii.GetPidValueMetric("SAE.MAP") - 2.45 / 0.17;
var Barometric = Obdii.GetPidValueMetric("SAE.BARO") * 0.14504;
var BoostPSI= AbsolutePSI - Barometric;

if (BoostPSI >= 25.5)
{
     Obdii.ConsolePrint("Whoa there!");
}
else
{
     Obdii.ConsolePrint("Get more boost!");
}

[mtxpert]

Can the output be used for a the virtual gauges?

I'm ready to buy whatever I need to get this thing working!!!
LMK,
Mike

[BrianP]

When you add a new script parameter, it shows up just like any other parameter does. It will be displayed in the data view, and you can graph it, or hook it to a gauge, or whatever. There are no limitations to the script parameters. Anything you can do with a normal parameter, you can also do with a script parameter. There is nothing extra that you need to buy in order to get the script parameters working. It's all built in.

[mtxpert]

OK here's the next step:
I need the gauge to show in HG vs PSI so the if statement would be something like:

if (BoostPSI < 0)
{
var BoostPSI = AbsolutePSI - Barometic * 2.036
}
else
{
var BoostPSI = AbsolutePSI - Barometric
}


Will this still work?
If so we have a winner, I just need to make sure I can order the AutoTAP cheap cable and buy your software so I can have a functional boost gauge via my NAV screen.

[mtxpert]

Well I can now calculate boost effectively from my scans, the bad thing now is that I have to clamp the voltage in order to stop from getting fuel cut due to my bigger turbo. Looks like I'm back to needing an analog input from a pressure sender for an electronic boost gauge.

[nimikipod]

how about calculating the boost from the MAF  ?(for those of us with VAG'S)