Stage 1 vs Stage 1+ — what actually changes
هذا الدليل متاح حاليًا باللغة الإنجليزية.
Stage 1 and Stage 1+ are the two calibration services we offer. The difference is not "more aggressive numbers" — it is what the calibration is allowed to assume about your car.
This guide explains what each service actually changes, and how to pick the one that matches the car you have, not the car you plan to build.
01Stage 1: a calibration for a stock car
Stage 1 is a documented recalibration of your factory ECU maps for a mechanically standard car. It assumes factory hardware in factory condition — no supporting modifications required.
The candidate is built from your own original file on a supported ECU family, then reviewed, adjusted where needed, and approved by a human tuner before you can download it.
Pick Stage 1 if your engine, intake, and turbo plumbing are stock and you want the gains available within the hardware the factory fitted.
02Stage 1+: a declared-setup calibration
Stage 1+ is a calibration for a car with declared supporting changes — typically fuel grade and bolt-on hardware such as an upgraded intake or intercooler.
It comes with a written per-ECU contract that states the declared setup, what the calibration assumes (fuel, hardware), and the expected gains for that combination. The contract is the promise-keeping mechanism: what is written there is what the tuner builds and verifies against.
Pick Stage 1+ if you run the declared fuel and hardware consistently. The calibration is built for that setup — running a different one means the assumptions no longer hold.
03How to decide
Be honest about the car as it stands today. Stock car → Stage 1. Declared bolt-ons and the right fuel → Stage 1+.
Numbers depend on your specific engine, fuel, hardware, and the file your car actually carries — which is why Stage 1+ states expected gains per contract rather than this page quoting a universal figure.
Everything we offer stays within the scope on the pricing page; if your plans go beyond it, talk to support before ordering rather than after a rejection.
The tuner sees your file, not your plans. A calibration is approved for the setup you declared — changing the hardware afterwards changes the deal.
04Switching between them
If you order Stage 1 and later add hardware, you do not stack tunes — you come back with the same original file, declare the new setup, and the calibration is rebuilt for it.
Revert-to-stock is available at any time: your original file is stored immutably with its hash, so the way back is always the exact bytes your car started with.
استكشاف الأخطاء
- My car has a modification that is not in the declared list
- Declare it in the intake notes anyway. The tuner decides whether it fits the Stage 1+ scope; an undeclared modification found in review costs you a round-trip.
- I want a specific number
- Stage 1+ contracts state expected gains for your declared setup. No serious calibration work promises one universal figure across different cars, fuels, and hardware conditions.
- I am not sure my fuel grade qualifies
- State the fuel you actually run (the octane you fill, not the best available in your country). The contract is built around it — and the tuner would rather adjust the plan than the engine knock margins.
كل ملف من Flow VIN Tune يُراجَع ويُعتمَد من قبل مُعايِر بشري قبل أن يصبح متاحًا للتنزيل. تعديل برمجيات المحرك قد يؤثر على اعتماد الطراز والتأمين وضمان الشركة المصنّعة، وقد يكون استخدامه على الطرق العامة مقيّدًا في بلدك — الالتزام بالأنظمة مسؤوليتك. الأدلة معلومات عامة وليست تعليمات لسيارتك بعينها؛ عند الشك، استشر مختصًا.
أدلة ذات صلة
Preparing your file and uploading it to Flow VIN Tune
File formats, full vs partial reads, and walking the upload flow without surprises.
Writing your approved tune (and reverting to stock)
Flashing the delivered file back to the car, plus how revert-to-stock works.
Identifying your ECU (Bosch MED17.3.x and friends)
Match your car to its ECU family using labels, part numbers, and the intake form.