razorlab
Well-Known Member
- First Name
- Bryan / Briana
- Joined
- Oct 2, 2021
- Threads
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- 4,736
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- Location
- Your moms bedsheets
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- Not a Corvette.
- Thread starter
- #1
What this is:
A walkthrough of how I setup a system that data logs my lap times plus engine and chassis telemetry data, all in one nice file and also streams in real-time to an in-car display
Why:
Having disparate devices hooked up was a mess and creates too much work to combine files, not to mention too many devices to mount and manage.
I had a system like this in my last track car and I loved it for simplicity and the ability to see all data at a glance, while also having a data log file to study after. I was seeking something similar in my Supra.
Here is a video example from my last track car. The system was streaming to an android head unit so I could see lap times + telemetry data in real time. Also the added benefit to overlay all this data on my track videos:
Here is a video example of the same type of system running in my Supra, the difference currently is that all data is streaming to an android tablet:
So, what's the system?
Currently, the system consists of:
The RaceCapture device looks like this:
First off, you need to connect the device to the power, ground and CAN2 low/high.
The easiest location to tap into the CAN2 network on the Supra is the passenger side outer footwell. You pop off the plastic trim and you will find the harness to tape into. The CAN2 twisted pair wire colors are Yellow/Black and Yellow/White. I used Lockitt 20-22 AWG Posi-Taps for this.
For power, I used an Add-Circuit fuse tap at the fuse box DIRECTLY above the wire harness in the foot well. There is an empty slot at F47 you can use. This powers off 6 mins after shutting the car off.
I used this location for the ground (Thanks to another forum member for this reference photo)
If you wish to tap CAN at the ECU instead, you can use this for reference:
For connecting the OBD2 port, I ran the Can Extension cable through the passenger side firewall, across the engine bay and back into the cabin via the drivers side firewall. I then connected the extension cable to the supplied OBD2 cable and that cable into the Supras OBD2 port.
Okay, now you have the device connected to power/ground and the Supras data systems. Next you need to setup your phone or tablet so you can see things. Your phone/tablet acts as a display for the system and also saves the streaming data to a file. You also have the option of upgrading to the Racecapture Pro that has on-board datalogging onto an SD card. However, this write up is for the Racecapture Track that has no ability to save to a file on the device itself.
For your phone/tablet you have two options to connect to the Racecapture device, either wireless through wifi or bluetooth, or hardwired to the device via USB-C. For hard wiring android devices, you need an OTG adapter. I chose to hardwire the device to make it as solid as possible.
Next you need to connect the supplied GPS antenna to the Racecapture device and mount the antenna somewhere with a clear view of the sky. I chose to mount it on my tablet mount as this was the easiest solution for me currently. It also has the added benefit of being put away when you aren't using the system.
I mounted my Racecapture device under the glovebox, towards the firewall. I did this because it was the easiest place to route all the cables and such. You also get the added benefit of routing the USB-C cable + the GPS antenna through the side of the dash which makes it a neat install and gives you the ability to just tuck the cables away when not using the system.
Here is a photo referencing how I routed the cables. Of course, if you mount your phone or tablet somewhere else, you can route the cables differently.
Congratulations, you now have the hardware part of the system complete. However, if you stop now, all you would get are lap times.
In order to actually get all the data from the car flowing into the system, you have to set it up correctly in the Racecapture software. You need to setup both CAN and OBD2 data channels.
Another forum member, @TYRFRYR, did an awesome job of figuring out a good set of CAN data items. All credit for this goes to him, thank you!
Here is the current list of all CAN items we can datalog:
As you can see, for track use, there are some VERY handy data items here. In the Racecapture software, you can find @TYRFRYR's preset in the CAN Mapping tab:
Or, if you want to add them yourself, here is a spreadsheet with both CAN and OBD2 items for the Supra. I'm also happy to share my RaceCapture config file with anyone that wants it!
Here is the current list of OBD2 items:
Now, you have everything setup, awesome! You should see data something like this:
One important thing to note. The Supra will NOT stream data unless the car is on and running. I am used to cars streaming data in ACC mode, so I was stumped for a bit thinking I had wired things incorrectly. Then I turned the car on and magically things started working.
The above screen is the raw data view. The really cool part of the RaceCapture app is you can customize screens to your hearts content and have multiple screens you can move to as you wish.
Here are some examples from their website:
So, the real power here is that now you will have data logs of not only your lap times, but also vehicle dynamics like brake pressure, g-force, yaw, individual tire speed, etc AND engine data, all in one data log that you can look over after your laps.
Here is another video showing the data overlayed and the actual system at work:
I have some upgrades I am looking at doing to the system, so this will be updated as I go. If anyone is interested in doing a system like this themselves, please ask any questions you might have, happy to help!
A walkthrough of how I setup a system that data logs my lap times plus engine and chassis telemetry data, all in one nice file and also streams in real-time to an in-car display
Why:
Having disparate devices hooked up was a mess and creates too much work to combine files, not to mention too many devices to mount and manage.
I had a system like this in my last track car and I loved it for simplicity and the ability to see all data at a glance, while also having a data log file to study after. I was seeking something similar in my Supra.
Here is a video example from my last track car. The system was streaming to an android head unit so I could see lap times + telemetry data in real time. Also the added benefit to overlay all this data on my track videos:
Here is a video example of the same type of system running in my Supra, the difference currently is that all data is streaming to an android tablet:
So, what's the system?
Currently, the system consists of:
- Autosport Labs RaceCapture Track Mk3 hardware device
- The above device connected to the Supras OBD2 port + CAN network
- Some additional cables:
- Autosport Labs Power + CAN pigtail
- Autosport Labs Can1/Can2 Splitter (to combine the separate CAN and OBD2 cables into one input)
- Autosport labs Can Extension cable (it was easier for me to use an extension cable through the engine bay than take apart more interior panels)
- Samsung Android tablet (You can also use your android or iOS phone that you already have)
- RAM tablet mount
The RaceCapture device looks like this:
First off, you need to connect the device to the power, ground and CAN2 low/high.
The easiest location to tap into the CAN2 network on the Supra is the passenger side outer footwell. You pop off the plastic trim and you will find the harness to tape into. The CAN2 twisted pair wire colors are Yellow/Black and Yellow/White. I used Lockitt 20-22 AWG Posi-Taps for this.
For power, I used an Add-Circuit fuse tap at the fuse box DIRECTLY above the wire harness in the foot well. There is an empty slot at F47 you can use. This powers off 6 mins after shutting the car off.
I used this location for the ground (Thanks to another forum member for this reference photo)
If you wish to tap CAN at the ECU instead, you can use this for reference:
For connecting the OBD2 port, I ran the Can Extension cable through the passenger side firewall, across the engine bay and back into the cabin via the drivers side firewall. I then connected the extension cable to the supplied OBD2 cable and that cable into the Supras OBD2 port.
Okay, now you have the device connected to power/ground and the Supras data systems. Next you need to setup your phone or tablet so you can see things. Your phone/tablet acts as a display for the system and also saves the streaming data to a file. You also have the option of upgrading to the Racecapture Pro that has on-board datalogging onto an SD card. However, this write up is for the Racecapture Track that has no ability to save to a file on the device itself.
For your phone/tablet you have two options to connect to the Racecapture device, either wireless through wifi or bluetooth, or hardwired to the device via USB-C. For hard wiring android devices, you need an OTG adapter. I chose to hardwire the device to make it as solid as possible.
Next you need to connect the supplied GPS antenna to the Racecapture device and mount the antenna somewhere with a clear view of the sky. I chose to mount it on my tablet mount as this was the easiest solution for me currently. It also has the added benefit of being put away when you aren't using the system.
I mounted my Racecapture device under the glovebox, towards the firewall. I did this because it was the easiest place to route all the cables and such. You also get the added benefit of routing the USB-C cable + the GPS antenna through the side of the dash which makes it a neat install and gives you the ability to just tuck the cables away when not using the system.
Here is a photo referencing how I routed the cables. Of course, if you mount your phone or tablet somewhere else, you can route the cables differently.
Congratulations, you now have the hardware part of the system complete. However, if you stop now, all you would get are lap times.
In order to actually get all the data from the car flowing into the system, you have to set it up correctly in the Racecapture software. You need to setup both CAN and OBD2 data channels.
Another forum member, @TYRFRYR, did an awesome job of figuring out a good set of CAN data items. All credit for this goes to him, thank you!
Here is the current list of all CAN items we can datalog:
As you can see, for track use, there are some VERY handy data items here. In the Racecapture software, you can find @TYRFRYR's preset in the CAN Mapping tab:
Or, if you want to add them yourself, here is a spreadsheet with both CAN and OBD2 items for the Supra. I'm also happy to share my RaceCapture config file with anyone that wants it!
Here is the current list of OBD2 items:
Now, you have everything setup, awesome! You should see data something like this:
One important thing to note. The Supra will NOT stream data unless the car is on and running. I am used to cars streaming data in ACC mode, so I was stumped for a bit thinking I had wired things incorrectly. Then I turned the car on and magically things started working.
The above screen is the raw data view. The really cool part of the RaceCapture app is you can customize screens to your hearts content and have multiple screens you can move to as you wish.
Here are some examples from their website:
So, the real power here is that now you will have data logs of not only your lap times, but also vehicle dynamics like brake pressure, g-force, yaw, individual tire speed, etc AND engine data, all in one data log that you can look over after your laps.
Here is another video showing the data overlayed and the actual system at work:
I have some upgrades I am looking at doing to the system, so this will be updated as I go. If anyone is interested in doing a system like this themselves, please ask any questions you might have, happy to help!
Sponsored
I wish you lived closer. I'd pay someone to set up my Harry's laptimer 
I just did a Apple Watch "session" on how I can use the new scuba diving model. I'm sooooooo non tech friendly 
. Track Addict was a complete failure (for me), so I'm going back to Harry's. I found a way to record the video down to 720p and my GPS can do 10Hz. So I was pretty happy about that for my next time out.
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