The Porsche GT4 is hands down the best GT4 car in Project Motor Racing. In player straight-line acceleration and top-speed testing on Build 2.2, the Porsche GT4 radically outperforms every other vehicle in the GT4 class and even surpasses GT3 machinery on straight-line terminal velocity. This Balance of Performance (BOP) mismatch gives the Porsche an overwhelming competitive edge, leading several community leagues to ban the car entirely.
Project Motor Racing GT4 Straight-Line Benchmark
Testing conducted in Build 2.2 evaluated default-setup cars in a controlled straight-line acceleration run from a standing start at a checkered line past an intermediate signpost to an end barrier. The results show the Porsche GT4 pulling ahead of the entire GT4 category and out-speeding GT3 machinery down the stretch.
| Vehicle | Class | Speed at Signpost | Top Speed at Barrier | Performance Summary |
|---|---|---|---|---|
| Porsche GT4 | GT4 | 158 | 172 | Class-leading acceleration; beats GT3 top speed |
| Ford Mustang GT3 | GT3 | 162 | 170 | Faster initial jump to the sign; gets pulled on top end |
| Ford Mustang GT4 | GT4 | 151 | 162 | Baseline GT4 performance; 10 lower top speed than Porsche |
The default Mustang GT3 beats the Porsche GT4 to the intermediate signpost (162 vs. 158), but the Porsche GT4 continues pulling through the upper gears to register a top speed of 172 at the barrier—two points higher than the GT3 Mustang and ten points higher than the Mustang GT4.
Why the Porsche GT4 Dominates the Class Meta
The primary factor driving the Porsche GT4 to the top of the leaderboard is its straight-line Balance of Performance (BOP). In simulation racing, GT4 cars are designed to be noticeably slower than the GT3 category across all metrics. In Project Motor Racing Build 2.2, however, the Porsche GT4 generates straight-line pull that rivals and exceeds higher-tier cars.
Because the car achieves straight-line speeds that are disproportionately high for its class, it approaches GT3 lap times on power-sensitive circuits. Straight4 Studios has been alerted by community testers regarding the need to dial back the Porsche's power output. Until an official BOP balancing update arrives, the car remains an uncontested meta choice in open lobbies, while organized competitive leagues frequently exclude it to keep racing balanced.
Other vehicles confirmed in the GT4 category roster include the Ford Mustang GT4, along with mentions in setup configurations of the Nissan, Toyota Supra, and Aston Martin. While alternative cars offer varied driving characteristics, none match the sheer straight-line speed delivered by the Porsche under current default tuning.
GT4 Handling and Tire Temperature Management
Despite straight-line balance quirks, GT4 machinery is widely considered by testers to deliver closer, more refined door-to-door racing than the GT3 class. However, running these cars effectively requires an understanding of the game's tire physics and force feedback nuances.
- Force Feedback Weight: GT4 steering feedback in Build 2.2 feels substantially heavier and more weighted than GT3 vehicles. Drivers often describe the chassis feel as slightly boaty or floaty compared to lighter, downforce-heavy platforms.
- Target Tire Temperatures: Based on wheel telemetry and grip sensations, the optimal GT4 tire operating window sits between 170°F and 190°F.
- Overheating on High-Load Tracks: Circuits with long, high-speed sweepers—such as Mosport—put severe thermal loads on specific tires (particularly the front-left). In hot summer conditions, aggressive driving can push front-left temps past 200°F up to 210°F, though major grip drop-off remains manageable during short 5-to-10 lap sprint stints.
- Slide Recovery and Physics Bugs: Testers have documented edge-case handling anomalies where a car enters an extended slide and struggles to regain grip. In some instances during Build 2.2 testing, tire telemetry has abruptly displayed 0 PSI (simulating a severe puncture or reporting an unrendered flat-tire state).
Recommended GT4 Base Setup Baseline
Community setup tuning across the GT4 class provides solid baseline parameters to stabilize the cars without overcomplicating mechanical adjustments. Unlike GT3 platforms, GT4 cars have more restrictive transmission options and fewer aero adjustments.
- Traction Control (TC) & Anti-Lock Brakes (ABS): Setting TC to 4 and ABS to 6 provides a stable starting point across most circuits. Drivers can drop TC slightly if they need more rotation on exit, but extreme changes yield diminishing returns.
- Rear Wing Downforce: Adjusting rear wing angles in the GT4 class produces relatively minimal changes in lap times compared to GT3 aerodynamics. Drivers should establish a comfortable base angle and avoid over-tuning the aero profile.
- Rear Suspension & Anti-Roll Bars: If the rear end steps out under acceleration or turn-in, softening the rear suspension by one or two clicks helps keep the rear planted. When combating corner understeer or oversteer, adjust the front and rear anti-roll bars together before making single-click isolated tweaks.
- Fuel Loads: A default fuel capacity of 7.5 gallons serves general practice and medium sessions, while reducing fuel down to 3.1 gallons optimizes the chassis for sprint qualifying laps.
Frequently Asked Questions
What makes the Porsche GT4 the best car in Project Motor Racing?
The Porsche GT4 holds a distinct straight-line speed advantage over the rest of the GT4 field in Build 2.2. In straight-line testing, it reached 172 at the barrier compared to 162 for the Mustang GT4, allowing it to easily pull away on long straights.
Why is the Porsche GT4 banned in some multiplayer leagues?
Because of its BOP imbalance, the Porsche GT4 produces lap times that border on GT3 performance levels. League administrators ban the vehicle in GT4-only championships to prevent unfair advantages until Straight4 Studios releases a power adjustment patch.
What are the ideal GT4 tire temperatures in Project Motor Racing?
Tester observations indicate that GT4 tires find optimal mechanical grip between 170°F and 190°F. Driving past 200°F on abrasive circuits like Mosport increases thermal wear, though sprint races under 10 laps rarely see total grip failure under normal driving inputs.
What base TC and ABS settings work best for GT4 cars?
A setting of 4 on Traction Control and 6 on ABS is the community baseline recommendation for GT4 cars. It provides sufficient electronic intervention to prevent rear snaps while preserving braking stability.
