GravityTuning

Chiptuning

Stages and options, and what each of them actually changes.

Vehicle types

Calibrations are prepared for more than passenger cars.

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Abarth Alfa Romeo Alpina Alpine Aston Martin Audi BMW BYD Bentley Bugatti Buick Cadillac Caterham Chery Chevrolet Chrysler Citroen Cupra DS Dacia Daewoo Dodge Donkervoort Ferrari Fiat Ford GMC Geely Genesis Haval Honda Hummer Hyundai Ineos Infiniti Isuzu Iveco Jaguar Jeep Kia Lada Lamborghini Lancia Land Rover Lexus Lincoln Lotus Lynk & Co MG Mahindra Maserati Maxus Mazda McLaren Mercedes Mini Mitsubishi Morgan Nissan Opel Peugeot Polestar Pontiac Porsche Proton RAM Renault Rolls-Royce Rover Saab Seat Skoda Smart SsangYong Subaru Suzuki Tata Tesla Toyota Vauxhall Vinfast Volkswagen Volvo Wey

Stages

A stage describes what the vehicle is actually running, not simply how much power you would like from it.

Stage 0

A recalibration that leaves the vehicle at its factory power figures. Used to clean up throttle response and driveability, or to bring a poorly calibrated file back to a sound baseline.

Stage 1

Software only, on an otherwise standard vehicle. No hardware changes are required.

Stage 1+

For vehicles with light bolt-on changes, such as an intake or a less restrictive exhaust, but with the standard turbocharger and internals.

Stage 2

For vehicles with supporting hardware already fitted — typically a downpipe, an intercooler or an intake upgrade. The hardware has to be on the vehicle before the file is written.

Stage 3

For heavily modified engines, usually with an upgraded turbocharger or injectors. Each file is matched to the specific build.

E85

Calibration for E85 ethanol fuel. The fuel system has to have the capacity and the ethanol tolerance for it.

E85+

E85 calibration pushed further, for vehicles with the supporting hardware for it.

Return to stock

Returns the control unit to the original factory calibration.

Gearbox (TCU)

Transmission software: shift points, shift speed and torque limiters, where the platform allows them to be changed.

Engine management analysis

We review your original file and tell you what the engine management allows before you commit to a stage.

Options

Options are selected on top of a stage. What is available depends on the vehicle and on its engine management.

Performance

E85 Flex-Fuel

Calibration for E85 ethanol fuel, or for a varying mix of E85 and petrol. The fuel system has to have the capacity and the ethanol tolerance for it.

Octane adaptation

Adapts ignition timing and fuelling to the octane rating actually available where the vehicle is driven.

Hard rev cut

Changes the rev limiter from a gradual cut to an abrupt one.

Launch control

Holds a set engine speed on standing starts, where the platform supports it.

Vmax OFF

Removes the factory top speed limiter.

Driveability and comfort

Cold start OFF

Shortens or removes the raised idle and enrichment phase after a cold start.

Hot start fix

Corrects hard starting when the engine is already at temperature.

Start & Stop OFF

Disables automatic engine shutdown at a standstill.

Cylinder on demand OFF

Keeps all cylinders running instead of allowing partial-cylinder operation under light load.

Swirl flap OFF

Disables intake swirl flap control, normally after the flaps have been removed mechanically.

Sport button

Ties the vehicle's driving mode selector to the tuned calibration.

Sport display

Enables the on-board performance displays, where the platform provides them.

Sound

Pop & Bang

Produces exhaust pops on overrun. It raises exhaust and catalyst temperatures, so it is not suitable for every vehicle.

Popcorn

A rapid crackle effect at the rev limiter.

Exhaust flaps

Changes how the exhaust valve is controlled, where one is fitted.

DSG shift sound

The audible effect on gear changes for dual-clutch gearboxes.

Emission systems

Not for use on public roads

These options disable emission control systems. Applying them to a vehicle used on public roads is not permitted in the EU or in many other countries, and it will normally invalidate the vehicle's type approval, its roadworthiness certificate and its insurance. We supply them for off-road, competition and export use only. As a professional, the customer is responsible for how the file is used and for complying with the law in the country where the vehicle is registered.

DPF / GPF OFF

Disables control of the particulate filter, normally after the filter itself has been removed.

EGR OFF

Disables exhaust gas recirculation.

SCR / AdBlue OFF

Disables the SCR / AdBlue after-treatment system.

DTC OFF

Suppresses selected diagnostic trouble codes so that they no longer trigger a warning.

Decat

Adapts the file for a vehicle running without a catalytic converter.

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