Popular
Stage 1 Tune
A safe, noticeable power gain through software alone, without changing a single part.
Stage 3 (Turbo Upgrade & Project)
Project-based maximum performance with a bigger turbo, upgraded fuel system and car-specific software.
- Petrol
- Diesel
- Project-based (several days)
About the service
What is it and how does it work?
Stage 3 starts where the factory turbo reaches its limits. It is a project-based build planned around a larger or hybrid turbo, together with a matching fuel system (injectors, high-pressure pump), an uprated intercooler and boost piping, and clutch and gearbox upgrades if needed. Depending on the target power, internal engine parts such as pistons and connecting rods may also need to be strengthened.
Stage 3 software is not an off-the-shelf file; Legend Tuned calibrates it from scratch for the chosen hardware. Boost pressure, ignition, fuelling, wastegate control and torque limits are tuned step by step over many datalog sessions. That's why the time and scope vary from project to project, depending on the target power and parts availability.
We start every Stage 3 project with a planning meeting: the car’s current condition, its intended use (daily, track, drag) and the target power are defined together. We talk openly about whether the engine and drivetrain can safely handle that power; we don’t make promises for unrealistic targets.
Benefits
What do you gain?
- Power potential beyond the limits of the factory turbo
- Custom software built from scratch for the chosen hardware
- Build planned around your use (daily, track, drag)
- Parts selection, fitting and calibration by one team
- Safe tuning verified step by step with datalogs
Process
How is it done?
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01
Step 01 Planning meeting
Target power, intended use and the car’s current condition are assessed.
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02
Step 02
The turbo, fuel system, intercooler, clutch/gearbox and, if necessary, internal engine parts are selected.
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03
Step 03
The parts are fitted; sealing and system checks are completed.
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04
Step 04
Legend Tuned custom software is calibrated through multi-stage datalog sessions.
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05
Step 05
Final checks are carried out; at handover, we share recommendations for the initial period of use.
FAQ
Stage 3 (Turbo Upgrade & Project) — FAQ
The most frequently asked questions about this service, with short answers.
Have another question?Message us with your car’s make, model and engine.
Is Stage 3 suitable for daily driving?
Yes, if planned properly. The turbo choice and software are shaped by how you use the car; a build focused on daily driving aims for a wide power band and driving comfort rather than peak power.
How long does a Stage 3 project take?
It depends on parts availability and the scope of the work. Once the parts are ready, fitting and calibration usually take a few days; we’ll give you an exact timeframe during the planning meeting.
Is it necessary to replace internal engine parts?
It depends on the target power and the engine type. Some engines run safely on factory internals up to a certain level; beyond that limit, uprated internals are needed. We make this clear at the planning stage.
Compatibility
Which vehicles is it available for?
Gains vary by engine type, turbo/naturally aspirated design and hardware. Our vehicle database has Stage figures ready for 58 makes and 7.907 engines — select your car and see the stock and Stage figures.
Figures are examples/estimates and may vary with the car's mileage, maintenance condition, fuel quality and hardware. Exact results are determined by dyno/datalog.
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