Why do they give us the option to change this? Seems to me I could make the WBO2 read what ever I want by changing this setting? See pic. How should the transform selector be set up?
for hpt wbo2 transform.png
Why do they give us the option to change this? Seems to me I could make the WBO2 read what ever I want by changing this setting? See pic. How should the transform selector be set up?
for hpt wbo2 transform.png
Yeah you can make it what you want, but put the formula that's the formula found in the manual.
Page 10 of the AEM 30-0300 manual gives the lambda formula as:
(0.1621*Volts)+0.4990.
For the formula in the transform it's Input/x. Input is volts to the Prolink A/D. Instead of multiply it's divide, so take the inverse. Input/(1/.1621)+0.4990 -> Input/6.169+.4990
As a way to double check the math look over at the table to the right in the manual. 4V is 1.15 lambda. (4/6.169)+.4990 = 1.147
Last edited by SiriusC1024; 10-05-2024 at 12:39 AM.
You can also adjust your ground offset with the formula. I find it much easier to adjust ground offset when in lambda. It is a important step to double check for offset and adjust if needed.
If there is an offset that means different voltage potentials. If there is an offset how can you be sure that it's the same offset for the whole range of operation? I'd say fix the offset or use a digital output of the wideband.
I have 2 afr500v2s, both have an offset with one being worse than the other(its marked). Both used with prolink+ cables. I have even tied the analog grounds to the power grounds and come out with the same offset. They are both consistent with certain model/years. I use the same formula on all 07-13 trucks, seperate formula for g5 camaro, 09-06 truck has a seperate formula. Swaps are a different story but i have a formula for 1 swap vehicle that nails it every time, different from other formulas. All assuming im using the same unit. Where is the offset?
I do verify my work watching the gauge during a pull or cruising condition. I use a tailpipe sniffer on the dyno mounted wb for somewhat of a verification.
The term offset is thrown around a lot. A lot of times people will see something like 15.3 AFR during CL and adjust the wideband formula. The only offset is a voltage offset, and this occurs when scanner doesn't match gauge.
Are you saying one gauge reads differently from the other? That's calibration.
Prolink is still analog. The only way to be sure of no voltage offset, and no mathematical cobbling, is to use serial or CAN.
One of the gauges has more offset scanner vs display than the other, very slight. I have purchased a v2 can unit from ballenger i use on can vehicles. Still using the old analog setups on older vehicles. I have not messed with the usb serial output yet. Either way, im getting the results i want.
Oh man guys, I believe I have this all effed up right now, can you help me understand this? When you look at the pic. in my first post, how in the heck am I getting a reading in HTP log that seems like it makes sense when compared to the NBO2's switching points?
I hate that I am a complete idiot with this part right now, but I assume I need to just set up the transform selector area again with the proper math? In the beginning I slightly remember trying to set it up with the output scaling formula in the AEM directions but couldn't get a lambda output that made sense and somehow ended up on the reason for this thread question by using the AFR stoich. number instead of the proper math equation in the function line.
Here is a pic of my directions and it's just as Sirius has stated.
aem.jpg
Sirius, how is someone supposed to know to enter the inverse of the formula or I don't enter the inverse in the function line but enter the exact formula that is stated in the directions and the output ends up being the inverse?
Why do they list two different formulas for AFR and Lambda? Right now in my logs, it appears the software is reading Lambda and coverts it to AFR in the other channel?
I'm sorry, but can you guys hold my hand here a little and walk me through this?
red rocket 66 added VE for corn.hpt
Last edited by abc; 10-06-2024 at 11:59 AM.
Why can you not use the predefined transform?
Now that you showed that pic, is it possible that is what I am using now? Can you tell that by the attachments I've added? In the PID list, that is what I have selected but when I open the transform tab, the formula does not show what you have.
I remember seeing that window when I was originally setting up the wide band.
Now that you showed that pic, is it possible that is what I am using now? Can you tell that by the attachments I've added? In the PID list, that is what I have selected but when I open the transform tab, the formula does not show what you have.
I remember seeing that window when I was originally setting up the wide band.
You can input the formula from my photo. The HPT predefined formula are not exact but should be close enough.
How did you get the formula to show up when the channel is selected? I thought I was able to see it at one point about a year ago but now I can't seem to figure out how to see the same thing you are seeing.Originally Posted by 04silverado6.0
I am using a prolink. Have the red a/d pid, transform.
Dividing is the same as multiplying by the inverse. 3 / 0.5 is the same as 3 * 2. 1 / 0.5 = 2
That's for if you're doing it like the pic in the first post. I don't do that. I make a user defined math for whatever voltage source. That way I also have a set for all the different wideband types. Same for wideband error.
This is starting to make some sense to me now. The com I'm on right now is not behaving like my lap top and I don't feel like figuring out why as I don't use it for tuning. When I get back to my lap top this evening I will start the testing with the formula.
Do you guys have any idea why the number I have input into the first pic allows something that appears normal for a lambda reading? Understanding why it's goofed up may help to understand a little more about how it is supposed to work, although I think I understand what is supposed to happen now.
.1621.hpl
6.169.hpl
TEST AFR check.Channels.xml
TEST 1 AFR check.Channels.xml
Well I tried both formulas and neither made any sense. Do you think it has something to do with me using a serial to usb connection? I still don't know why my original formula produces a normal looking output.
I don't know what you're doing. When you right click on the A/D>Transform this is what shows up. It's the same as what I have in bold at post #2.
aem eq transform.png
Oh you're going down to user-defined putting in AEM 30-0300 for parameter. That then goes into input then the math is performed double. Don't do that.
Last edited by SiriusC1024; 10-08-2024 at 08:46 PM.
It's clear that I'm not understanding the basic instructions on how to add this properly. In your pic. it is now clear to me that you are showing the steps for a MPVI 2 with a Pro Link. That is not how I have mine set up. I have my AEM 30-0310 wired to a serial to usb adapter which then the usb plugs into the lap top. I have been using the external inputs>serial port>AEM EQ. I guess that leads me back to my original question, do you think I have it set up correctly or can you help me figure this one out? Would it make sense that I would need to know what the input is coming from the AEM controller that gets wired to the serial to USB adapter?
afr aem.png
Last edited by abc; 10-09-2024 at 06:29 AM.
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