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Added to a calibration order

One credit. The unit every calibration license is bought in.

A credit is what licenses a calibration to one engine controller. Vehicles consume between two and ten of them depending on the platform and how many modules are being written — the number is on every vehicle page, and the credits your vehicle needs are already inside its price. This line is for adding credits to an order, not for buying a tune.

Performed as part of your tune

Opening a locked controller so a calibration can be written to it.

Many later controllers are locked from the factory and nothing can be written to them — by us or by anyone — until that protection is removed. It is a physical service performed on the module, and the figure depends on the specific ECM, so it is quoted against your part number rather than listed. We perform it as part of the tune that needs it; we do not sell it on its own for another shop to calibrate.

Added to a booked session

An hour on the hubs. Three pulls and the full sheet.

Measurement without calibration — a baseline before a build, a verification of what a previous shop delivered, or a check that a part did what it claimed. Ambient conditions are logged on every run and the correction standard is printed on the sheet you leave with. Added to a booked session, or booked as its own hour on the hubs.

Requires a DEFI calibration on the car

An exhaust calibration for the LT6. Sound, not power.

An addition to a C8 Z06 calibration we have written — it is not sold on its own and it cannot be applied to someone else’s tune. It alters overrun and shift fuelling to produce flame on lift and downshift. It does not add power, it costs fuel economy, and it is for off-road and competition use — like everything else here, it is sold with the trade-off stated.

Booked as a dyno session · DEFI RTD4 included

Calibration for a Magnuson-blown engine, developed on the dyno.

A supercharger kit ships with a starting file, not a calibration for your car. This is the real one: fuelling, spark, torque management and boost behavior developed under load with knock, intake air temperature and lambda watched on every pass. Forced induction is where a bad tune stops being a disappointment and starts being an engine. The DEFI RTD4 the calibration is delivered on is included, and yours to keep for revisions.

Collected in Corona — never shippedIn-shop

E85, E90 and E98. Collected at the shop — we cannot ship fuel.

The ethanol blends we calibrate on, sold over the counter in Corona by the pail or by the drum. Ethanol fuel is a regulated flammable liquid and it cannot travel as an ordinary parcel at any price, so this one is collection only — buy it when you drop the car off, or on the day of your session.