Hondata

Version 2.8.7.0 Build 3996

I forgot to mention that I moved the fuel pressure sensor signal wires from AN0 to AN5 to see if that had anything to do with my issue, but it did not.

Sorry for the delay in getting back to this. Instead of recording AN5 voltages, I tried something different. I did two datalogs, just driving around my home. No changes to my setup from before. To clarify, these were on-board datalogs, not directly recorded on my laptop while driving. After ...

I was able to install it. Your comment about saying you want to "Keep" the file was the key. Thanks.

FWIW, I just downloaded a driver for my Epson printer and that worked fine.

It doesn't give me any warnings along the way. It just downloads the .crdownload file and that's it.

I just got a new laptop running Windows 11 pro. I have downloaded the latest version of SManager and get a message as follows "SManagerV2-8-7 isn't commonly downloaded. Make sure you trust SManagerV2-8-7.exe before you open it."

The file that my laptop has downloaded is named "Unconfirmed 82058 ...

Nevermind. I figured out how to change AN0 back to volts.

Thanks for looking at this. Unfortunately, my car is in pieces right now, so I will not be able to try on-board datalogging of the fuel pressure sensor voltages for probably a couple of weeks. When I do get back to it, how do I get SManager to let me change AN0 from a pressure value back to voltage ...

I have an issue with datalogging fuel pressures. I have been running an S300 for several years and have my system setup to do on-board datalogging when the AC button is pressed. It has generally worked well.

More recently, I have had some fuel starvation issues under cornering (autocross) and ...

Thanks for straightening that out. I was making it more complicated than it needed to be.

So, now the math is:

map (from datalog) - 1.013 = relative pressure. 1.013 is 1 standard atmosphere

If that amount is less than zero, multiply by 29.53 to get inches of vacuum.

If that amount is greater ...

FWIW, I have been able to convert Wideband voltages from the datalog into lambdas and get reasonable agreement (my calc vs what SManager reports). I'm using an AEM wideband (30-0300).

Here is the Datalog. Frame 1224 contains the data for the example I put in my post yesterday.

I have SManager set to display pressure as vac/boost. Relative inches of vacuum below atmospheric and psi of boost above it.

There's nothing I've found in the help file or elsewhere that says what the math is, so I tried to come up with something that I thought made sense.

Here's an example:

The SManager Sensor display (and the Graph) for a particular frame says I have 18.4 psi of boost. PA for that frame is 97.3 kPA ...

Does anyone know how SManager converts MAP signal voltages into pressures? I am using a Hondata 4 bar MAP and I see the quick select input values of 838 mbar/volt with an offset of 31 mbar.

I take the voltage x 838 and add 31, which should give me the mbar of pressure, but it doesn't agree with the ...