Kirtsy Calibrations builds custom calibrations for diesel engines that work for a living: pickups, tow rigs, farm, construction and industrial equipment.
What we do
We write and tune engine (ECM) and transmission (TCM) calibrations with professional tools including EFI Live and WinOLS, and deliver them as files you load into your own controller. Every custom calibration starts from your stock read and your hardware, not a canned file.
How we approach a calibration
Power only matters if the engine lives to use it. We work within the limits of the hardware that is actually on your engine: exhaust gas temperature, rail pressure, boost, fueling against available airflow, and the torque your driveline can take. If a goal is not realistic for a setup, we say so plainly and explain what would change that.
Built from your files
Your stock read, your hardware and your goals. Nothing is guessed from a model year alone.
Checked against data
Data logs show what the engine really did. We use them to verify and refine the calibration.
Straight answers
You get a clear quote before you pay and a real person reading every message.
Who we work with
Owners who want a calibration matched to their truck or equipment, and shops that want a reliable calibration partner. If you run a shop, see the Dealer Program.
Talk to us
Questions before you order are welcome. Use the contact page or the chat on this site. Ready to go? Start a Custom Tune.