Our Stage 2 Tune is everything you’ve been looking for to wake up the potential of your car! We offer a high quality tune that will help your car perfor

BDT Stage 2 ECU Tune

2000–2006 Audi TT 1.8T 180HP (Mk1 • 20V Turbo)

If your Mk1 TT still feels “quick for its age,” it’s because Audi left a ton on the table. BDT Stage 2 is where the 1.8T finally wakes up and starts acting like a real turbo car. We’re talking harder spool, stronger mid-range shove, and a TT that pulls clean to redline without that mushy factory hesitation.

This isn’t a generic file. It’s a dialed-in calibration built to max out the stock turbo safely with the right supporting mods. Remote flashing means you can install from your driveway — no gimmicks, no stress, just results.

Drive it daily. Launch it anytime. Make your TT feel alive again.

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Fitment & Compatibility

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Audi TT 1.8T Stage 2 — What You’re Getting

BDT Stage 2 Tune Features — Audi TT 1.8T 180HP

• ? Noticeable horsepower & torque jump everywhere
• Boost pressure increased + stabilized for a real turbo hit
• Throttle response sharpened (no more lazy pedal)
• Raised torque/load limiters for stronger mid-range punch
• AFR & fueling optimized for safe power on 93 octane
• Ignition timing recalibrated for crisp pull without knock drama
• Cam timing + VVT strategy refined for spool and top-end
• Turbo lag reduced for instant response
• Speed limiter removed
• OBDII flashing — easy install, no shop required

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Crackle Pops / Overrun (Optional)

Want that TT to snap, burble and crack on decel? Stage 2 supports adjustable overrun. Stock exhaust is subtle — a downpipe/catback makes it nasty (exactly how you want it).

Boost Control Optimization

Factory boost control is bumpy and inconsistent. Our calibration smooths the curve so every pull feels clean, strong, and repeatable — no dips, no weird surge, just steady shove.

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POWER GAINS

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ECU TUNE MODIFICATION REQUIREMENTS

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INCLUDED WITH STAGE 2

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ADDITIONAL OPTIONS

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SOFTWARE INSTALLATION REQUIREMENTS

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

I WANT YOUR CAR TO SURVIVE YEARS WITH MY TUNE. I’VE TUNED COUNTLESS 1.8T CARS AND THIS IS WHAT KEEPS THEM HEALTHY. IF YOU CAN’T AFFORD THE PARTS, PLEASE DON’T TUNE YOUR CAR.

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.
• Use on emissions-regulated vehicles is strictly prohibited by federal law and may result in fines up to $45,000 per vehicle.
• This product is not EPA or CARB certified and is not legal for sale or use in California or CARB-aligned states.

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 unlawful use.
3. Release Boost Dynamic Tuning, LLC from any damages or penalties resulting from improper use.

⚖️ Indemnification Clause

• Use inconsistent with this disclaimer
• Misrepresentation of vehicle use
• Violation of emissions laws or regulations

Final Notice

Sold “as is” with no warranties regarding legality for highway use. The end-user is solely responsible for determining legal use. Boost Dynamic Tuning, LLC does not condone illegal street use or emissions tampering.

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

m at the level you have been looking for. With the ease of a remote tune. We ensure to make your performance tune experience happen with no gimmicks and no stress.

Boost Dynamic Tuning's Stage 2 Gains: 

PSI  18 - 21 

Tapering PSI 15 - 17  (depending on elevation)

Horse Power 60

Torque 70 - 80

Modifications Required for tune:

• Removed Catalytic Converter
• (recommended Diverter Valve Upgrade)
• Upgraded Spark Plugs (BKR7EIX .028 Gap)

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Stage 2 Engine Calibration Modifications: 

• Increased Throttle Response

• Increased Boost Pressure

• Air Fuel Ratio (Afr) - More fuel added

• Raised Ignition Angle

• Increased Cam Timing

• Idle speed Limiter Raised

• Speed limiter raised

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Included with Stage 2 Tune:

NLS/ No Lift To Shift

• On average, this option is set to 6000rpms

Emissions OFF (OFF-ROAD USE ONLY):

• N249

• Evap

• N80

• Rear o2

• Sai ( Secondary air injection)

MAF-Less Tune:

This means I will be using your map sensor for fueling control. So you can leave your maf unplugged, and install any Maf housing you wish.

Immobilizer delete:

This allows your vehicle to start when you replace your stock ECU with a tuned ECU. This will also allow your vehicle to start if your key’s transponder fails (This is a common issue on the MK4 platform). *NOTE: If your key fails with immobilizer delete your vehicle will still start, However, you will still have a flashing key light until you adapt another key to the cluster.

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Additional Options:

Crackle Pops/Burbles Options (be sure to note your preference in the comment box. The default is set to intense):

• LIGHT

• MEDIUM

• INTENSE (This will cause some vehicles to make flames, if the vehicle is straight piped.)  

Two Step/Anti lag/Launch Control 

• On average, this option is set to 4500rpms. *NOT AVAILABLE FOR AUTO TRANS MODELS*

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Special requests available

• AEB cylinder heads Only - VVT (Variable Valve Timing) Removal 

MBC (Manual Boost Controller)

This is a small device that goes between the pressure side and the wastegate , and gives you the control to set boost pressure to a desired level. BDT’s tune only allows the car to boost between 0-23psi. In the event you set the controller higher than 23psi, Boost Dynamic Tuning is not responsible for catastrophic events. 

**  PLEASE NOTE, IF YOU SCHEDULE AN APPOINTMENT WITH US TO FLASH YOUR TUNE, AND YOU ARE LATE WITH NO CONTACT, THERE WILL BE A $50 LATE FEE APPLIED. IF YOU NEED TO RESCHEDULE YOUR TUNE, YOU MUST CONTACT US AT LEAST AN HOUR BEFORE YOUR APPOINTMENT, OR THERE WILL BE A $50 FEE APPLIED. **