Yes, it IS possible!
In a different thread about wheel upgrades, I talked about whether or not it would be possible to change the overall diameter of the wheels & tires while maintaining a relatively accurate speedometer. To recap, my 2020 Venue SE comes with 185/65R15 (24.5 inch total diameter), but SEL and Denim trims come with 205/55R17 (25.9 inch total diameter). This is not just an instance of increasing the amount of wheel while decreasing the amount of sidewall. It's almost an inch and half difference in overall diameter, which makes a noticeable difference in the amount of empty space in the wheel wells. Some may think that the speedometer is just calibrated somewhere in the middle of the two sizes, but that doesn't appear to be the case here. My speedometer is more or less dead-on accurate compared to GPS speed measurements, and there are different configurations of ECU for the Venue depending on wheel sizes. So it's a pretty safe bet that a different revolutions-per-km value is programmed into the car depending on the wheel size.
Based on info from the Hyundai shop manual and electrical diagrams, the speedometer info comes from the 4 wheel sensors, goes to the ESC system (ABS & traction control), and from there is sent over the CAN bus where the instrument cluster picks up the data and displays the speed.
Knowing that the speed data was traveling on an actual data network instead of just a wire making electrical pulses, I had kind of given up on swapping wheels. Then one day I stumbled across Canny Logic, a company that makes programmable CAN bus devices (https://cannylogic.com/).
I sent an email asking if it was possible to use one of their devices to intercept and rewrite CAN bus data. I got an email back from Konstantin (who has been very helpful in this entire process) saying that yes, it was possible. I would need their Canny Duo device, which has two CAN network interfaces on it.
After playing around with the device for a few weeks, I am happy to report that I have SUCCESSFULLY implemented this device as a speedometer ratio calibrator within my Venue's CAN bus.
In a different thread about wheel upgrades, I talked about whether or not it would be possible to change the overall diameter of the wheels & tires while maintaining a relatively accurate speedometer. To recap, my 2020 Venue SE comes with 185/65R15 (24.5 inch total diameter), but SEL and Denim trims come with 205/55R17 (25.9 inch total diameter). This is not just an instance of increasing the amount of wheel while decreasing the amount of sidewall. It's almost an inch and half difference in overall diameter, which makes a noticeable difference in the amount of empty space in the wheel wells. Some may think that the speedometer is just calibrated somewhere in the middle of the two sizes, but that doesn't appear to be the case here. My speedometer is more or less dead-on accurate compared to GPS speed measurements, and there are different configurations of ECU for the Venue depending on wheel sizes. So it's a pretty safe bet that a different revolutions-per-km value is programmed into the car depending on the wheel size.
Based on info from the Hyundai shop manual and electrical diagrams, the speedometer info comes from the 4 wheel sensors, goes to the ESC system (ABS & traction control), and from there is sent over the CAN bus where the instrument cluster picks up the data and displays the speed.
Knowing that the speed data was traveling on an actual data network instead of just a wire making electrical pulses, I had kind of given up on swapping wheels. Then one day I stumbled across Canny Logic, a company that makes programmable CAN bus devices (https://cannylogic.com/).
I sent an email asking if it was possible to use one of their devices to intercept and rewrite CAN bus data. I got an email back from Konstantin (who has been very helpful in this entire process) saying that yes, it was possible. I would need their Canny Duo device, which has two CAN network interfaces on it.
After playing around with the device for a few weeks, I am happy to report that I have SUCCESSFULLY implemented this device as a speedometer ratio calibrator within my Venue's CAN bus.