BDT Stage 1 ECU Tune — 2015–2021 Audi S3 (8V • EA888 Gen 3 • IS38)

Our Stage 1 ECU calibration wakes up your IS38-equipped S3 with crisp response, a harder mid-range, and clean power to redline — all with daily reliability. Remote flashing makes install quick and stress-free at home or on the go.

Why Boost Dynamic Tuning?

We build calibrations on real data. BDT showcases live before/after dyno runs and transparent results — no additives, no inflated claims. Just proven power and drivability.

Stage 1 Features — S3 (8V)

• Power Gains: up to ~375 HP & 390 TQ (93 octane)
• Speed Limiter Removed
• Neutral/Park Rev Limiter Raised
• Auto Start/Stop Defaults Off (toggle retained)
• Torque Limiters Raised for stronger mid-range
• Fueling/Torque Request Optimized by throttle & load
• Stock Boost Gauge Re-scaled to show higher boost
• Overrun / Crackle Pops in Dynamic (optional)
• Refined Boost Control for smooth, linear onset
• Reduced Turbo Lag
• LPFP / HPFP Targets Optimized
• VVT Optimization for response & efficiency
• Multi-Map Switching (up to 5 maps)
• OBDII Port Flashing — easy laptop install

Dyno-Verified Power Gains

   ECU TUNE MODIFICATION REQUIREMENTS

CRACKLE Pops (Overrun)

Selectable Low / Medium / Intense levels and RPM-dependent windows (Dynamic mode). Subtle on stock exhaust; rowdy with downpipe or full system.

Boost Control & Driveability

Factory boost can feel bumpy on long pulls. BDT smooths the boost curve for crisp, consistent power delivery — stronger mid-range and cleaner top-end without surging.

Multi-Map Switching (Up to 5 Maps)

Switch maps on the fly using the cruise controls. Popular options: Daily 93, “Spicy” race fuel, Valet, Low-boost-DAILY DRIVING, and Pops-off. We tailor maps to your preference.

Recommended Supporting Mods

• Intake (recommended)
• Intercooler (recommended for heat-soak control)
• Spark Plugs — NGK Racing R7438-8 / BKR8EIX (~.024–.026")
• BDT TCU Tune (DQ250/DQ381) — higher clamping, smarter shift logic, raised N/park limiter
• Downpipe (optional; not required for Stage 1)

Recommended plugs: NGK R7438-8

Software Install Requirements

Windows laptop/tablet (Win 7+, 32/64-bit, 4GB+ RAM, 1.0GHz+), Wi-Fi & USB. Flash via OBDII. Remote support available.

Late Policy: If you book an in-person flash and arrive late without notice, a $50 fee applies. Reschedules must be made at least 1 hour prior.

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 Environmental Protection Agency (EPA) or the California Air Resources Board (CARB), and is therefore not legal for sale or use in California or any state that follows CARB standards.

Assumption of Risk and Waiver of Liability

By purchasing and/or installing this product, you agree to:

1. Assume all risk and responsibility for compliance with applicable local, state, and federal laws and regulations.
2. Waive all claims, liabilities, and legal actions against Boost Dynamic Tuning, LLC, its officers, directors, employees, and affiliates arising from the purchase, installation, or use of this product in violation of any applicable law.
3. Release Boost Dynamic Tuning, LLC from any and all damages, injuries, or penalties resulting from improper or unlawful use.

⚖️ Indemnification Clause

You further agree to indemnify, defend, and hold harmless Boost Dynamic Tuning, LLC from any fines, penalties, damages, losses, or legal fees resulting from:

• 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 the legality of this product 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.

 **  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. **

DOWNPIPE NOTICE: BY PURCHASING A MOTORSPORT/RACING PRODUCT ("PRODUCT"), YOU REPRESENT THAT YOU UNDERSTAND AND AGREE THAT: THE PRODUCT IS NOT DESIGNED TO MEET ANY APPLICABLE EMISSIONS STANDARDS, WHETHER IN THE USA OR OTHERWISE, THE PRODUCT IS NOT C.A.R.B. COMPLIANT, AND THAT THE PRODUCT IS NOT FOR SALE OR USE IN CALIFORNIA, USA NOR ANY OTHER JURISDICTION WHERE THE SALE OR USE IS PROHIBITED BY LAW. BOOST DYNAMIC TUNING, LLC MAKES NO REPRESENTATIONS, WARRANTIES, OR CLAIMS THAT THIS PRODUCT COMPLIES WITH ANY APPLICABLE EMISSIONS LAWS AND EXPRESSLY DISCLAIMS ANY AND ALL SUCH REPRESENTATIONS, WARRANTIES, AND CLAIMS, WHETHER EXPRESS OR IMPLIED. BY PURCHASING THIS PRODUCT, YOU REPRESENT, WARRANT, AND AGREE THAT IT IS YOUR RESPONSIBILITY TO INFORM YOURSELF OF ANY LAWS OR REGULATIONS THAT MAY APPLY TO YOUR PURCHASE AND/OR USE OF THE PRODUCT.

Emissions Compliance Notice & Legal Disclaimer: This product is sold for motorsport and off-road use only. It is not C.A.R.B. approved and not legal for sale or use in California or other jurisdictions requiring emissions compliance. By purchasing, you acknowledge responsibility for compliance with all applicable laws and regulations.