BDT Stage 1 ECU Tune

2000–2006 Audi TT 225HP 1.8T (8N)

Your Audi TT didn’t come from the factory to be quiet or timid — it came to hunt. Boost Dynamic Tuning’s Stage 1 ECU Calibration is the wake-up call your 225HP K04 1.8T has been begging for. Expect faster spool, a sharper throttle, and that hard-pulling mid-range the stock file leaves on the table — all while keeping a smooth OEM+ daily feel.

Drive it daily. Rip tunnels at night. Launch whenever you feel like embarrassing stock cars.

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Fitment & Compatibility

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BDT Stage 1 Tune Features – Audi TT 225 1.8T (2000–2006)

• ⚡ Noticeable horsepower and torque gains
• Speed limiter removed
• Raised torque limiters for a stronger mid-range hit
• Fueling optimized by throttle position for safer power
• Optional crackle & pop overrun on decel
• ⏱️ Refined boost control for smooth, linear delivery
• Turbo lag reduced for quicker spool
• Low-pressure fuel pump targets increased
• Variable valve timing recalibration
• OBDII port flashing — install at home, no shop required
• Award-Winning 2-Step & NLS (No-Lift-Shift)
• Mafless tuning available (by request)
• Immobilizer delete available (track cars)

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AUDI TT 225 1.8T STAGE 1 PERFORMANCE ECU TUNE

BDT Stage 1 turns your 225 into what Audi should’ve shipped: harder pull, quicker response, and a K04 that finally feels alive. Designed for stock-turbo cars on 93 octane with safe OEM-style protection logic.

Crackle Pop & Overrun (Optional)

On lift-off or free-rev, you’ll get that clean overrun burble and snap that makes the TT feel aggressive again. Factory exhaust = subtle. Aftermarket exhaust = wicked.

Boost Control Optimization

Factory boost is conservative and lazy. We reshape the curve so power hits earlier, builds smoother, and stays consistent through the pull — no weird dips or soft spots.

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Power Gains – Audi TT 225 Stage 1 Results

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ECU Tune Modification & Hardware Requirements

PLEASE NOTE:

If you have an upgraded turbo, you are not eligible for Stage 1/2 power targets. You must purchase our Stage 3 Tune (includes K04 hybrid & big-turbo setups).

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IF YOU WANT YOUR TT TO SURVIVE, THESE MUST BE DONE!

EMISSIONS COMPLIANCE NOTICE & LEGAL DISCLAIMER

FOR COMPETITION USE ONLY — NOT FOR STREET USE

This product is sold and intended solely for vehicles used in closed-course racing, off-road competition, or organized motorsport events. It is not legal for use on any pollution-controlled vehicle operated on public roads or highways, as defined under the Clean Air Act (42 U.S.C. § 7522) and applicable state emissions laws.

By purchasing, installing, or using this product, you explicitly acknowledge and agree to the following terms:

Federal and State Emissions Compliance

• This product may modify, bypass, defeat, or render inoperative one or more emissions control devices, including but not limited to: catalytic converters, oxygen sensors, EGR systems, or OBD monitoring systems.
• The installation or use of this product on any vehicle subject to emissions regulations is strictly prohibited by federal law and may result in civil or criminal penalties, including fines up to $45,000 per vehicle under the Clean Air Act.
• This product is not certified by the EPA or CARB, and is therefore not legal for sale or use in California or any CARB-adopting state.

Assumption of Risk and Waiver of Liability

1. Assume all risk and responsibility for compliance with applicable laws.
2. Waive all claims and liabilities against Boost Dynamic Tuning LLC arising from use in violation of law.
3. Release Boost Dynamic Tuning LLC from any damages or penalties resulting from improper or unlawful use.

⚖️ Indemnification Clause

• Use of this product in a manner inconsistent with this disclaimer
• Misrepresentation of vehicle use
• Violation of any emissions laws or regulations

Final Notice

This product is sold “as is” and “with all faults”, with no warranties, expressed or implied, regarding legality for public highway use or emissions compliance.

It is the sole responsibility of the end-user to determine legality for the intended application. Boost Dynamic Tuning LLC does not condone or recommend illegal street use or emissions equipment tampering.

By completing your purchase, you acknowledge that you have read, understood, and agreed to this disclaimer in full.