The APR 3.0 TFSI Ultracharger Throttle Body System B8 / B8.5 Chassis - S4 / S5
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This is the APR Ultracharger System.
The APR Ultracharger System dramatically increases horsepower and torque, and maximizes the power potential of the 3.0 TFSI. It removes a massive pre-supercharger restriction, allowing uninterrupted airflow into the supercharger for up to an astonishing 542 HP with APR’s Supercharger and Crank Pulleys. Stunning carbon fiber and smooth cast-aluminum adorn the system, creating a clean and simple install that looks just as powerful it is. Finally, APR’s innovative Ultracharger ECU Upgrade delivers a smooth and exciting driving experience, and it is included as a free upgrade to all who own an APR Stage II ECU Upgrade.
The Restriction
The factory throttle body is a massive power-robbing restriction. Its cross-sectional area is ~25% smaller than the supercharger’s inlet, causing airflow to plummet at high supercharger speeds. It’s responsible for losses as high as 33 HP!
The Solution
The APR Ultracharger Throttle Body is huge. Its cross-sectional area is ~28% larger than stock, and an additional 5% larger than the supercharger’s inlet. It completely eliminates the throttle body as a point of restriction and allows for maximum airflow into the supercharger.
The APR Ultracharger ECU Upgrade
APR’s incredible Ultracharger ECU Upgrade is why it all just works. It delivers an outstanding driving experience, packed with a smooth daily driving, thrilling wide open throttle acceleration, and unmatched performance. It’s APR's most advanced 3.0 TFSI software to-date, and it’s included as a free upgrade to all who own an APR Stage II ECU Upgrade.
- +133-230 Horsepower
- +97-168 FT-LBS of Torque
- 80mm Throttle Body
- ECU Upgrade Included
Calibration Report:
Audi S4 / S5 (B8) Stage Fuel Grade Power Torque Gain Over Stock APR Stage 2+ Ultracharger 91 AKI / 95 RON 478 HP 426 FTLBS +133 HP +97 FTLBS APR Stage 2+ Ultracharger 93 AKI / 98 RON 498 HP 441 FTLBS +154 HP +112 FTLBS APR Stage 2+ Ultracharger 100 AKI / 104 RON 530 HP 464 FTLBS +185 HP +135 FTLBS APR Stage 2+ Ultracharger 104 AKI / 108 RON 542 HP 472 FTLBS +196 HP +143 FTLBS Audi S4 / S5 (B8.5) Stage Fuel Grade Power Torque Gain Over Stock APR Stage 2+ Ultracharger 91 AKI / 95 RON 478 HP 429 FTLBS +167 HP +122 FTLBS APR Stage 2+ Ultracharger 93 AKI / 98 RON 498 HP 444 FTLBS +187 HP +137 FTLBS APR Stage 2+ Ultracharger 100 AKI / 104 RON 530 HP 467 FTLBS +219 HP +160 FTLBS APR Stage 2+ Ultracharger 104 AKI / 108 RON 541 HP 475 FTLBS +230 HP +168 FTLBS
Tech Notes:
APR’s Ultracharger ECU Upgrade is required. This included upgrade requires purchase of APR's Stage I and Stage II ECU Upgrades.
This upgrade is only applicable to superchargers with a pressed on pulley
This product is designed for use with APR’s Supercharger Drive and Crank Pulley Upgrades, APR's S Tronic TCU Upgrade, included NGK BKR9EIX plugs gapped @ .024” +/- .002” torqued to 30Nm., and the APR Coolant Performance System.
IAT’s must be below 75c to achieve the advertised power figures.
A high flow intake system is highly recommended and is required to meet the advertised power figures on the A4/A5/S4/S5/Q5/SQ5. For the best results, APR recommends removing the intake snow screen.
At these power levels APR does not recommend use of the factory catalyst.
Applications:
Audi A4 / A5 / S4 / S5 (B8/B8.5 Typ 8K / 8T) 3.0 TFSI