A calibration is written for a car as it is on the day. Cars do not stay that way. Fuel changes, parts go on, seasons change, and something eventually needs a second look. With an interface on the car, none of that needs the car to come back to Corona.
How a revision reaches the car
This is the same loop for a first-week fix, a fuel change or a supercharger a year later.
- 01Drive the car and record a datalog in the TDN app, then upload it.
- 02Tell us what changed: parts fitted, the fuel in the tank, what it is doing that it should not.
- 03We read the log, write the revision and send it to your device.
- 04The revised file appears in the app. Write it to the car, drive it, and send another log.
The supercharger in another state
One of our customers is exactly the kind of owner this is for. He is the type to move to Utah, have a friend give him a supercharger, and want it running before the next track day. Flashed in the shop with nothing left on the car, the only answer we could give him would be to drive it back to California.
With an interface on the car, the blower is a phone call and a log. The calibration is rewritten for the new combination and sent to the same device, and he never pays HP Tuners licensing again for re-flashing that vehicle on that interface.
What is included, and what is new work
Most cars want at least one revision after delivery — your fuel, your climate and your driving are not the dyno day. That is normal, and it is included.
A new part or a new fuel is a new calibration for a different car, so it is quoted as tuning work. What you do not pay again is the licensing: the vehicle is already licensed on your interface.
When remote is not the right answer
Some jobs belong on the dyno: a big hardware change where we want to see the power curve under load, or a car that is running badly for a reason a log points at but cannot prove. Some problems are mechanical, and no revision fixes a broken part. When that is what the data shows, we say so rather than tuning around it.
Questions people ask
- Do I pay for licensing again when my tune is revised?
- No. HP Tuners licenses a vehicle on an interface once, and re-flashing that vehicle on the same interface needs no more credits. A different device, or a different vehicle, needs its own licence.
- How long does a revision take?
- It depends on what changed. Send the log and tell us what is new, and we will tell you when to expect the file.
- Can you revise a tune another shop wrote?
- Not on the same file — we write our own calibration for the car. If you want a second opinion on someone else’s tune first, send us the logs for an expert review.