2017 - 2020 Audi 2.0T B9 A4 A5 2.0t Stage 1
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2017 - 2020 Audi 2.0T B9 A4 A5 2.0t Stage 1

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Height:
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Depth:
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Description

2017–2020 Audi A4 / A5 2.0T TFSI — Stage 1 ECU Tune

Your B9/B9.5 Isn’t Slow… It’s Just Factory-Choked ?

Remote OBDII Flash In-House Calibration OEM+ Drivability No Downpipe Required

Audi built the B9/B9.5 2.0T to be smooth — then they tuned it like a lease return. BDT Stage 1 is the “factory-fix” your A4/A5 should’ve shipped with. Expect harder midrange torque, faster spool, cleaner pulls, and instant throttle snap… without turning your daily into a drama queen.

Refined when you want it. Optional crackle in Dynamic/Sport when you don’t. ?‍??

✅ Fitment ? Features ? Gains ?️ Mods ? Install ❓ FAQ ⚖️ Legal

Fitment & Compatibility

Vehicle: 2017, 2018, 2019, 2020 Audi A4 / A5 2.0T TFSI (B9 / B9.5)

Engine: EA888 Gen 3 2.0T (Factory IS20 turbo)

Drivetrain: Quattro / FWD supported (as equipped)

Transmission: Automatic / DSG supported (as equipped)

Tuning Method: Remote OBDII flashing (at home or in-shop)

Fuel: 91 / 93 octane pump gas (setup-dependent)

Downpipe: NOT required for Stage 1

  • Windows laptop required for flashing
  • Support included during your flash session

Why Boost Dynamic Tuning?

We don’t sell mystery files. We build results. Every BDT calibration is developed in-house, refined on real vehicles, and protected by factory-style safety logic. No copy/paste maps — just clean power, smooth drivability, and repeatable performance you can trust.

Stage 1 Features — B9 A4/A5 2.0T

  • Dyno-tested gains: up to ~282 WHP / ~360 WTQ on premium fuel
  • Boost & torque strategy reworked for a harder midrange hit
  • Sharper throttle response + faster spool (less “factory delay”)
  • Speed limiter removed • Neutral/Park rev limiter raised
  • Torque limiters raised for stronger pulls
  • Fueling strategy optimized by load & throttle
  • Boost gauge recalibrated to display higher boost
  • Optional Overrun / Crackle Pops (Dynamic/Sport only — by request)
  • Refined boost control — linear onset + smoother long-pull stability
  • LPFP / HPFP targets optimized (within safe operating logic)
  • Variable valve timing recalibrated for stronger, cleaner power delivery
  • OBDII port flashing — no ECU removal required
  • Auto Start/Stop defaults OFF (still functional via factory button)

Dyno-Verified Power Gains

Stage 1 power (SEO quick view): up to ~282 WHP / ~360 WTQ on premium fuel. Results vary with dyno type, altitude, temperature/heat-soak, fuel quality, and vehicle condition.

STAGE HORSEPOWER (WHP) TORQUE (WTQ)
Stage 1 ~282 WHP ~360 WTQ
Reality check (the good kind): Stage 1 is built to be consistent and daily-safe. If your car is heat-soaking, running weak fuel, or needs maintenance, the car will protect itself — and power will reflect that.

ECU Tune Modification Requirements

Stage 1 hardware summary (SEO): No downpipe required. Intake + intercooler are strongly recommended for consistent power. Fresh plugs/coils help keep misfires away when you turn it up.

PART / UPGRADE REQUIRED RECOMMENDED / NOT REQUIRED
Highflow Exhaust   Not Required (Stage 1)
TCU / DSG Tune   Recommended
Air Intake   X
Intercooler   X
Spark Plugs   Recommended (fresh set)
Ignition Coils   Recommended (OEM healthy coils)

Optional Crackle Pops (Overrun)

Optional overrun/crackle is available by request and activates only in Dynamic/Sport. Stock exhaust = subtle. Freer-flowing setups = louder. Calibrated with RPM windows and safety logic to keep it fun without being stupid.

Boost Control & Drivability

Factory boost can feel uneven during long pulls. BDT Stage 1 refines boost control so the car delivers a linear, predictable surge with improved response and stability — especially when you roll into it mid-gear.

Software Install Requirements

WINDOWS LAPTOP REQUIRED (NO APPLE)

DEVICE PORTS OS PROC. POWER RAM
Laptop / Tablet Wi-Fi & USB Windows 10 or newer 64 bit 1.0 GHz+ 4 GB+

FAQ

Q: Does Stage 1 require a downpipe?
A: No. Stage 1 does not require a downpipe. Intake and intercooler are recommended for best consistency.

Q: Can I flash at home?
A: Yes. Remote OBDII flashing and support are included. A Windows laptop is required.

Q: What fuel does this support?
A: Typical 91/93 octane pump gas setups. Premium fuel is recommended for best results.

Q: Can you enable/adjust crackles?
A: Yep. Optional crackle is available by request (Dynamic/Sport only) and can be enabled/disabled or tailored.

Q: Will a TCU/DSG tune help?
A: Strongly recommended for shift behavior and torque management, but not required to run Stage 1.

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 installa