VCM Scanner 2.25 Beta Now Available

[MeentSS02]

Roger that...I'll figure something out.

[sssnake]

Quote Originally Posted by sssnake View Post
Fuel Cyl Air = =([PID.2126.KEL]*[PID.6210.MET]*[PID.6200]*[PID.6001])/[SENS.30.MET]
Can you confirm the function is correct, and also describe to me each unit these variables are using?

I plugged it in but was not getting accurate results.

I have added your VE cyl air for tomorrows beta. THe MAF cyl air already exists.

Keith,

MANY APOLOGIES. I grabbed the formula for GMVE based on fuel measurements (and to make things worse I did it twice). The formula for Fuel Cyl Air is IFR*IPW/1000*AFR or 6210*6200/1000*6001. Again, sorry to screw the pooch on that one.

This assumes IFR in g/s and IPW in ms.

[Keith@HPTuners]

Please post the actual math string that would be entered into VCM Scanner

[Keith@HPTuners]

Roger that...I'll figure something out.

Well, if you're using a 10% ethanol fuel, your stoich is actually around 14.1

I'd imagine if your calibrated stoich in the PCM doesn't match the actual stoich of your fuel, you should always have a small +/- fuel trim adjustment.

[sssnake]

Not sure what you mean but I'll take a shot...

Fuel Cylinder Airmass = Injector Flow Rate * Injector Pulsewidth Average Bank 1 / 1000 * Air Fuel Ratio Commanded Hi Res. IFR in g/s, IPW in ms and AFR is unitless.

[6210.71]*[50151.248]*[6001]

[gofastwclass]

Not sure what you mean but I'll take a shot...

Fuel Cylinder Airmass = Injector Flow Rate * Injector Pulsewidth Average Bank 1 / 1000 * Air Fuel Ratio Commanded Hi Res. IFR in g/s, IPW in ms and AFR is unitless.

[6210.71]*[50151.248]*[6001]

What is the .71 and .248?

Wouldn't something like ([6210]*[50151])/1000*[6001] be what you're looking for?
In my head, you want to divide the result of Injector Flow Rate * Injector Pulsewidth Average Bank 1, thus the formula above.
If you are trying to divide the Injector Pulsewidth first, the soft brackets need to be moved accordingly.

[Keith@HPTuners]

Not sure what you mean but I'll take a shot...

Fuel Cylinder Airmass = Injector Flow Rate * Injector Pulsewidth Average Bank 1 / 1000 * Air Fuel Ratio Commanded Hi Res. IFR in g/s, IPW in ms and AFR is unitless.

[6210.71]*[50151.248]*[6001]

Just create the parameter as a user math and then export it, and attach the XML file here as a reply.

[gofastwclass]

Keith, did you see the two suggestions I posted on page 53? You never commented like you usually do.

[Keith@HPTuners]

Keith, did you see the two suggestions I posted on page 53? You never commented like you usually do.

You guys are getting spoiled.

I already added both to the todo list.

[OldFartC6]

The new "Open Layout" list box is great but we need a way to delete obsolete layouts.
Here is an example: Only the first four layouts are actually saved.

Untitled.jpg

[gofastwclass]

You guys are getting spoiled.

I already added both to the todo list.

No, we just have the best software / hardware and an awesome team involved in making it better.

Thanks for all the hard work, it is much appreciated.

[schpenxel]

What is the .71 and .248?

Wouldn't something like ([6210]*[50151])/1000*[6001] be what you're looking for?

Apparently you aren't very familiar with 2.25.

[schpenxel]

Make what you'd like to see as a user defined one. Then save it, and post the .xml file here.

I've done it two ways. Usually just take MAP in kpa minus 100kpa, then put it in units of PSI when showing in charts/graphs.

Or you can do MAP minus barometric pressure for it to adjust for barometric pressure changes.. but then you have to be logging baro pressure all the time.

First way is easier, second way seems like it would be more accurate. I usually use first way so I don't have to log baro pressure.

Boost.MathParameter.xml

Boost2.MathParameter.xml

[sssnake]

XML file attached.

Fuel Cyl AIr.MathParameter.xml

[OldFartC6]

Anybody know how many Channels you can have open? I currently have 74 and it seems to be working in the garage. Can't actually drive because of terrible weather.

[gofastwclass]

Apparently you aren't very familiar with 2.25.

I'm experimenting with it but I hadn't seen (or noticed) that before. What does it do and how did you figure it out? The weather here is crap and work has been insane so I haven't had much free time to play with the cars. Datalogs with the max speed of 45MPH on snow and ice is great for drivability but not very fun.

Edit: Well crap. I see where that came from, I had looked it before the Math Parameters were even available and hadn't touched it since. Between the stress at my job and lack of sleep it was so long ago that I completely forgot what it was for. Please disregard my comment on this subject. It's 01:20 here, I'm going to bed. Good thing I have the next several days off.

OldFartC6, I've had a bunch of channels open and the only time I had problems was immediately after some Microsoft updates. I think it was more coincidence than the software, but initially it seemed to be software related dying four or five times in a row - even after a reboot. An uninstall / reboot / reinstall and I haven't been able to duplicate the problem since.

[Auto-Hentzschel]

Keith
please can you add the serial connection Zeitronix ZT-3 Widenband.
thanks!

[OldFartC6]

[I]
OldFartC6, I've had a bunch of channels open and the only time I had problems was immediately after some Microsoft updates. I think it was more coincidence than the software, but initially it seemed to be software related dying four or five times in a row - even after a reboot. An uninstall / reboot / reinstall and I haven't been able to duplicate the problem since.

You would think there is some kind of bandwidth limit but until I reach it I will keep adding channels. Might as well log everything! Haha Again all I have done is idled the engine in the garage.

[ElecTech]

You would think there is some kind of bandwidth limit but until I reach it I will keep adding channels. Might as well log everything! Haha Again all I have done is idled the engine in the garage.

It's ECU dependent. You won't get away with it on earlier LS stuff or some other platforms. I would still be worried about dropping packets or a decrease in resolution the more you log.

[OldFartC6]

It's ECU dependent. You won't get away with it on earlier LS stuff or some other platforms. I would still be worried about dropping packets or a decrease in resolution the more you log.

Common since says there has to be a limit. I have 84 channels open so far and haven't noticed anything bad yet. It may become more apparent when I actually drive the car.