On track yesterday, today and tomorrow in the new setup for my C5Z testing this box. It works great. Surprisingly well honestly. Fwiw the setup is a 2001 Corvette. 468 stroker with factory ECU. Dailey dry sump and and trans/diff coolers. This box was used to log temp data using these extra channels.

So I finally had a situation to use the VPW analyzer. Decided to use this instead of my python script. It's nice. One thing I noticed, it seems to really get back-logged with high-traffic on the bus. Not sure if you're updating the UI every time a message comes in and that's causing delay, but when ...

Well i finally connected it up to my bench ECU to start testing it. 3D printed a little box for it. Turns out the O2 signal and ground reference are isolated. So i need to ground the O2 low references to the output to get any data. Checked for any biasing circuit that might cause issues shorting low...

That's actually a very interesting idea. However I'm assuming that AD pins are NCed on the PCB and we would have to blue wire the MCU pins to the PCM connector, no? And then we would even need to figure out how to schedule the sampling in to the OS and assign a PID to it so it could be polled via OBD?

Good to know! Maybe I should scale this board up and support other forms of input.... EGR is something no one interested in this kind of thing would ever likely use. So then depending on the level of "race car" you could use: AC - Sometimes EGR - Almost always Secondary O2s (2 channels, al...

Oil Pressure is used. Thought EGR on the gen 3 was just an output to the solenoid. That's a good thought though. My ECU is powered off 3.3V but no reason i couldn't create some gain on the op amp to feed it. Up to 5. I want to say there's an op amp that biases the O2 sensor input to 450 mV. Not sure...

I am using 7603 but I'm more curious about the front end hardware. I can implement my own filtering if needed. I looked for other inputs that could be used to datalog a 0-5V signal and there is not much. 1) MAP 2) AC sensor I'm using these both which left my only open inputs as the down stream o2 se...

I'm aware they're not linear. Their temp curves are pretty easy to find online, so in the firmware I just have a LUT with 10C step resolution and it'll interpolate between that. I did not know that they switch RC networks to gain accuracy across temperatures, but it makes sense. When I was looking a...

Got the prototype boards in and assembled them. Realized that 0603 components might have been a mistake with your standard home soldering equipment lol. I do it all the time at work but don't have a great setup at home. c2543b5b13ac4dfcab2d37b3ab59fe72.jpeg . It's ugly but it's together. Here's a qu...

Hey there all, decided to use this as a place to put this tool development notes and what not. What does the tool do: This tool is designed to take 2 separate inputs for fluid thermistors (specifically GM/Delphi thermistors), and output an analog voltage to the ECU for datalogging over the unused se...