APR - Supercharger Crank Pulley Upgrade-B8 / B8.5 Audi S4, S5, SQ5, C6 / C7 A6, A7 3.0T / TFSI

APR’s Supercharger Crank Pulley Upgrade increases the diameter of the factory pulley from ~162mm to ~187mm, which in turn spins the supercharger ~15.4% faster. This results in a larger bump in horsepower and torque across the entire RPM range, as the supercharger is spinning at an even higher rate of speed. The pulley retains the factory harmonically balanced crank pulley and bolts on top of the existing unit. It is CNC machined from light weight billet aluminum with weight saving pockets throughout. It has an anodized black finish and includes new crank pulley bolts.

APR’s Supercharger Drive and Crank Pulley Upgrades dramatically increase horsepower and torque by increasing the rotational speed of the factory supercharger. APR’s Stage II Pulley ECU Upgrade makes the necessary engine management adjustments to handle the increased supercharger speeds, and in turn allows the engine to create more power. The pulleys are sold separately, allowing for multiple levels of performance, each of which builds upon the other. Finally, when combined with APR’s Ultracharger Throttle Body Upgrade in a dual pulley setup, the system is alleviated of power robbing inlet restrictions, allowing the engine to achieve exciting new levels of performance!

APR Stage 2  Software is required to take advantage of the APR Supercharger Crank Pulley Upgrade.  APR Stage 2 Software is $1,624.99  for customers without the Stage 1 ECU upgrade. If you are existing Stage 1 customer your price to Upgrade to stage 2 software is $324.99

• Fitments include:
• -B8 Audi S4 3.0T - 6-speed manual / S-Tronic
• -B8 Audi S5 3.0T - 6-speed manual / S-Tronic
• -C6 Audi A6 3.0T - Tiptronic [Dual Pulley in development]
• -C7 Audi A6 3.0T [Dual Pulley in development]
• -C7 Audi A7 3.0T [Dual Pulley in development]
• -Audi SQ5 3.0T [Dual Pulley in development]
• -Audi Q7 3.0T [Dual Pulley in development]

Tech Notes: This product is designed for use with APR's S Tronic TCU Upgrade, NGK BKR9EIX plugs gapped @ .024” +/- .002” torqued to 30Nm and a new supercharger belt.

The APR Coolant Performance System is highly recommended and required with the dual pulley setup. 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.

APR Stage 2 Calibration Results:

Audi S4 / S5 (B8)

Stage Fuel Grade Power Torque Gain Over Stock
Stage 2 Single Pulley      91 AKI /  95 RON  437 HP  386 FTLBS   +94 HP   +68 FTLBS
Stage 2 Single Pulley      93 AKI /  98 RON  455 HP  395 FTLBS  +112 HP   +82 FTLBS
Stage 2 Single Pulley     100 AKI / 104 RON  473 HP  404 FTLBS  +130 HP   +95 FTLBS
Stage 2 Single Pulley	  104 AKI / 108 RON  480 HP  409 FTLBS  +138 HP  +100 FTLBS
Stage 2 Dual Pulley        91 AKI /  95 RON  445 HP  412 FTLBS  +100 HP   +80 FTLBS
Stage 2 Dual Pulley        93 AKI /  98 RON  465 HP  428 FTLBS  +120 HP   +97 FTLBS
Stage 2 Dual Pulley       100 AKI / 104 RON  513 HP  459 FTLBS  +168 HP  +126 FTLBS
Stage 2 Dual Pulley       104 AKI / 108 RON  527 HP  469 FTLBS  +182 HP  +136 FTLBS

Audi S4 / S5 (B8.5)

Stage Fuel Grade Power Torque Gain Over Stock
Stage 2 Single Pulley      91 AKI /  95 RON  448 HP  381 FTLBS  +138 HP  +101 FTLBS
Stage 2 Single Pulley      93 AKI /  98 RON  458 HP  387 FTLBS  +148 HP  +108 FTLBS
Stage 2 Single Pulley     100 AKI / 104 RON  470 HP  398 FTLBS  +160 HP  +117 FTLBS
Stage 2 Single Pulley     104 AKI / 108 RON  481 HP  406 FTLBS  +171 HP  +125 FTLBS
Stage 2 Dual Pulley        91 AKI /  95 RON  445 HP  415 FTLBS  +134 HP   +98 FTLBS
Stage 2 Dual Pulley        93 AKI /  98 RON  468 HP  432 FTLBS  +157 HP  +115 FTLBS
Stage 2 Dual Pulley       100 AKI / 104 RON  513 HP  461 FTLBS  +202 HP  +147 FTLBS
Stage 2 Dual Pulley       104 AKI / 108 RON  527 HP  471 FTLBS  +215 HP  +157 FTLBS