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Can a tuner calibrate for changing tire sizes? I'm used to obd1 cars.
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My understanding is that with speed sensors on the hub instead of rotating mass, that modern cars are self-correcting ECU's now. There are too many other metrics that rely on vehicle speed such as stability control to have to manually adjust them anymore.Can a tuner calibrate for changing tire sizes? I'm used to obd1 cars.
Yes. If you order a custom tune, you can specify the diff ratio and tire size. Generic tuner products usually support this as well. You can also take it to a Ford dealer and have them change it (for a fee).Can a tuner calibrate for changing tire sizes? I'm used to obd1 cars.
There should absolutely be a field within the ecu to tell the computer what diff gearing and tire size is on the vehicle.Has any new information come out since this thread was active? I may change the tires and gear ratio and would like advice on how best to go about recalibrating the speedometer. I'm also not planning on getting a performance tune for what it's worth.
Yikes, that's $450. May as well buy a performance tune if that was the case! Thank you for the reply. So no matter what it'll be expensive to recalibrate?There should absolutely be a field within the ecu to tell the computer what diff gearing and tire size is on the vehicle.
In the very least, I would think a Ford dealer could adjust it for you if an aftermarket device isn’t available by that time.
https://performanceparts.ford.com/part/M-12655-F
No, that’s the dealer tool to do multiple vehicles. I only shared the link to show that they *do* have the capacity to edit those parameters in your car.Yikes, that's $450. May as well buy a performance tune if that was the case! Thank you for the reply. So no matter what it'll be expensive to recalibrate?