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2015 - 2021 Audi S3 2.0T EA888.3 ECU TUNE

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Boost Dynamic Tuning

Audi S3 8V ECU Tune

Real Numbers. Real Dyno.

Tap a stage for its numbers. The chart shows our filmed pulls — stock, Stage 2, and Stage 2+ E85. Every stage joins the chart as its pull is filmed.

Horsepower325WHP+65 over stock
Torque332WTQ+107 over stock
Fuel: 91/93 octaneRequired mods: none — stock IS38 hardwareData: peaks dyno-verified
Horsepower360.9WHP+100 over stock
Torque402WTQ+177 over stock
Fuel: 91/93 octaneRequired mods: high-flow exhaust + TCU tune (DSG)
Horsepower394.5WHP+134 over stock
Torque427.7WTQ+202 over stock
Fuel: E85 mixRequired mods: exhaust + flex sensor + TCU + HPFP
Horsepower465WHPturbo dependent
Torque420WTQturbo dependent
Fuel: 93 octaneRequired mods: turbo upgrade + full supporting buildData: see turbo options below
100200300400500200030004000500060007000
Stock baseline — 260.5 WHP / 225.3 WTQSTAGE 2 OUTPUT — 360.9 WHP / 402 WTQSTAGE 2+ E85 OUTPUT — 394.5 WHP / 427.7 WTQ
Stage 1 (325 WHP / 332 WTQ) pull not filmed yet — the chart shows our measured pulls. Its graph goes up the day it hits the rollers.
Stage 3 (up to 465 WHP, turbo dependent) pull not filmed yet — the chart shows our measured pulls. See the turbo options below.

Stage 3 Turbo Options — Wheel Numbers on 93

TurboPeak WHPPeak WTQFuel Hardware
CTS IS38 Hybrid408365–385HPFP upgrade
Turbo Concepts Stage 3465400–420HPFP + LPFP + MPI 980cc injectors
APR DTR430400HPFP + LPFP + MPI

GT22 Garrett builds are also calibrated — running a different turbo? Contact BDT before purchase. Stage 3 includes LPFP/HPFP recalibration and a boost gauge calibrated for the new turbo.

If your tuner doesn't show before & after dyno videos, you're being lied to.

A dynamometer is a before-and-after measuring tool — not an absolute output number. Stage 2 and Stage 2+ E85 above are real pulls on our rollers against the same car's stock baseline. Every number on this page comes from the same dyno program — full graphs post as each pull is filmed.

 

How It Works — Flash It Yourself

No appointments. No screen-share. The free BDT Flasher app puts the tune in your driveway — plug in, pick your map, hit Flash. Your S3 sounds different in 20 minutes.

1

Download — grab the free BDT Flasher. One-click Windows installer, 30 seconds.

2

Plug In — Tactrix Openport 2.0 OBDII cable from your laptop to the port under the dash.

3

Sign In — your purchased tunes show up automatically. Pick your map.

4

Send It — hit Flash. 15–20 minutes, then pull out of the driveway.

Existing BDT customer? Text (843) 891-6687 and we'll load your tune into the flasher.

What's Included

5-Map SwitchingChange maps on the fly with the cruise control buttons
Rolling Anti-Lag (RAL)Build boost while moving — track / off-road use
2-Step / Boosted Launch2-step on manual • boosted launch on DSG
Crackle PopsBubble / Low / Medium / Intense / Off per map
True Flex FuelE85 stages — any ethanol content, no reflash
IAT + EGT Safety LogicOEM-grade protection strategies stay active
Speed Limiter RemovedFactory Vmax restriction deleted
Rev Limit RaisedMore usable RPM on every pull
Torque Limiters RaisedFactory torque caps lifted for full delivery
VVT OptimizationCam timing refined for response + spool
Refined Boost ControlSmoother ramp, reduced turbo lag
Boost Gauge Re-ScaledFactory gauge reads true boost (Stage 2+)
Auto Start/Stop Defaults OffNo more restart lag at every light
OBDII FlashingFlash it yourself at home with the BDT Programmer

Watch The Proof

Dyno pulls and every feature, on video. Sound on.

Stage 2 — Live Dyno (Audi S3)

Stage 3 — Live Dyno Pull

Park Crackles — S3

Intense Crackle Pops — S3

Driving Crackles Demo

Multi-Map + RAL Live

True Flex Fuel Demo

Map Switching Demo

 

What Your Car Needs, Per Stage

If it is not listed as required, the tune runs without it.

REQ Required before flashing REC Recommended Not needed
Part / UpgradeS1S2S2+ E85S3
Turbo UpgradeREQ
High-Flow ExhaustREQREQREQ
True Flex Fuel SensorREQ
TCU Tune DSG — required from Stage 2 upRECREQREQREQ
HPFP Upgrade (Autotech)REQREQ
LPFP Upgrade Stage 3 — scales with turbo choice*REQ
MPI 980cc Injectors (CTS) Stage 3 — scales with turbo choice*REQ
IntercoolerRECRECRECREQ
Air IntakeRECRECRECREQ
Drivetrain ReinforcementRECRECREQ

*Stage 3 fuel hardware scales with turbo choice — CTS hybrid builds require the HPFP upgrade only; Turbo Concepts builds require HPFP + LPFP + MPI 980cc; APR DTR builds require HPFP + LPFP + MPI.

Multi-Map Layout — All Power Stages

MAP 1MAX POWER • BUBBLE CRACKLES • RAL
MAP 2MAX POWER • LOW CRACKLES • RAL
MAP 3MAX POWER • MEDIUM CRACKLES • RAL
MAP 4MAX POWER • INTENSE FLAME CRACKLES • RAL
MAP 5OEM STOCK POWER • NO CRACKLES

Switch maps on the fly with the cruise control buttons — daily to race to valet in seconds.

Maintenance

Maintenance ItemInterval
SPARK PLUGS
NGK Racing Plugs — ngk.com/ngk-4905-r7438-8-racing-plug
15–20K mi
OIL CHANGE
5W-40 Liqui Moly • OIL FILTER = OEM ONLY
5K mi
REAR HALDEX FLUID (Quattro)30K mi
TRANSMISSION FLUSH / FILTER
OEM only
30K mi
MAP SENSORS
OEM only • Intake / before throttle body
80K mi
PCV ASSEMBLY80K mi
INJECTORS + CARBON CLEANING
Do them on time to avoid misfires, lean conditions, and long-term damage.
85K mi

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