Transforming an Audi S3 into a capable track car while maintaining its daily drivability requires carefully chosen modifications. This guide details a comprehensive setup, covering engine, transmission, suspension, brakes, and wheels/tires, utilizing VCDS tweaks for optimal performance. This build focuses on maximizing track performance while retaining the practicality of a daily driver, perfect for kindergarten runs and client meetings alike.
Engine Performance Enhancements
This Audi S3 build boasts significant engine upgrades for increased power and responsiveness:
- APR Stage 2 ECU Software (v2.7): The foundation of this build, this software significantly increases horsepower and torque. Using VCDS, further fine-tuning and data logging can optimize performance.
- APR Downpipe: Reduces backpressure and improves exhaust flow, maximizing the gains from the tuned ECU.
- APR Intercooler: Keeps intake air temperatures low, crucial for consistent power delivery during track sessions.
- VWR R600 Intake with Muffler Delete: Improves airflow and adds an aggressive intake sound.
- Audi OEM RS7 Spark Plugs: Upgraded spark plugs provide a stronger and more reliable spark, especially under high boost conditions.
DSG Gearbox Optimization for the Track
The DQ250 DSG gearbox receives crucial upgrades for faster shifting and improved durability:
- Wavetrac Limited Slip Differential (LSD): Ensures power is distributed effectively to both front wheels, maximizing traction and minimizing understeer.
- APR Uprated Clutch Packs: Handles the increased torque output of the tuned engine.
- APR TCU Software: Optimizes shift points and shift speed for quicker acceleration and improved track performance.
- Modified VWR Lower Gearbox Mount: Provides a stiffer connection to the chassis, reducing movement and improving shift feel. This mount requires modification to fit the Audi alloy subframe.
Suspension Tuning for Enhanced Handling
A meticulously tuned suspension is key for track performance:
- Audi OEM Alloy Subframe: Provides a stiffer and lighter platform for improved handling.
- VW Clubsport S Swivels and Bearings: Increases negative camber by -0.5 degrees for enhanced grip in corners. VCDS adjustments allow further fine-tuning of camber and toe.
- H&R Sway Bars (Front and Rear): Reduces body roll, improving stability and cornering precision.
- Superpro Lower Control Arms (LCA): Adds an additional -0.5 degrees of negative camber and increases positive caster, further enhancing cornering grip and turn-in response.
- Superpro Bushings (Front and Rear): Replaces factory rubber bushings with stiffer polyurethane for more precise handling.
- 034Motorsport Top Plates: Enables further negative camber adjustment, resulting in a total of -3.0 degrees in the front and -2.0 degrees in the rear, maximizing tire contact patch during cornering. This requires VCDS adjustments for calibration.
High-Performance Braking System
Upgraded brakes are essential for consistent stopping power on the track:
- TTRS/RS3 8-Piston 4-Pot Calipers (Front): Provides significantly increased clamping force.
- VAGbremtechnic 362x32mm Disc Kit (Front) & 356mm Disc Kit (Rear): Larger rotors offer improved heat dissipation and braking performance.
- Ferodo DS2500/DS-UNO Brake Pads (Front) & DS2500 (Rear): High-performance pads offer excellent bite and fade resistance.
- Ferodo Brake Fluid: Provides a higher boiling point for consistent braking performance under extreme conditions.
Wheel and Tire Setup
This build utilizes two different wheel and tire setups:
- OEM 19″ Pretoria Wheels with Michelin Pilot Sport 4S Tires: For daily driving and street performance.
- OZ Superturismo GT 8×19″ Wheels with Nankang AR-1 Tires: Dedicated track setup providing maximum grip.
Future Modifications
Further planned upgrades include:
- Uprated Front Side Radiators: To improve cooling for the engine and gearbox oil.
- DV+ Valve: Potentially beneficial for maintaining boost pressure.
- Haldex 5 Rear Differential with Wavetrac LSD: To improve traction and handling.
This comprehensive approach to modifying an Audi S3 demonstrates how to create a well-balanced, track-capable car that remains a practical daily driver. Careful consideration of each modification and meticulous tuning using VCDS are key to maximizing performance and achieving the desired driving experience.
