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The Greddy A90 Supra downpipe is a popular aftermarket modification for the Toyota Supra A90, known for enhancing performance and sound. This article focuses on dyno testing to quantify the real horsepower improvements that the Greddy downpipe offers compared to the stock setup.
Understanding the Importance of Downpipes
Downpipes play a crucial role in the exhaust system of a vehicle. They connect the turbocharger to the rest of the exhaust system and are responsible for expelling exhaust gases efficiently. An upgraded downpipe can significantly reduce back pressure, leading to improved turbo response and overall performance.
Key Features of the Greddy A90 Supra Downpipe
- High-Quality Material: Constructed from durable stainless steel for longevity and resistance to corrosion.
- Increased Diameter: Larger diameter compared to the stock downpipe for better flow.
- Performance Design: Optimized for maximum exhaust flow and reduced turbulence.
- Compatibility: Designed specifically for the A90 Supra, ensuring a perfect fit.
Dyno Testing Methodology
To accurately measure the horsepower improvements from the Greddy downpipe, a series of controlled dyno tests were conducted. The following steps outline the methodology used:
- Baseline Testing: The stock downpipe was tested first to establish a baseline horsepower figure.
- Installation: The Greddy downpipe was installed, ensuring all connections were secure.
- Re-testing: The vehicle was run on the dyno again to measure the new horsepower output.
- Data Collection: All results were recorded for comparison.
Results of the Dyno Tests
The results from the dyno tests provided clear evidence of the performance benefits offered by the Greddy A90 Supra downpipe. Below are the key findings:
- Stock Downpipe HP: The baseline test recorded a horsepower figure of 350 HP at the wheels.
- Greddy Downpipe HP: After installing the Greddy downpipe, the horsepower increased to 385 HP at the wheels.
- HP Improvement: This represents a significant gain of 35 HP, showcasing the effectiveness of the downpipe.
Torque Improvements
In addition to horsepower gains, torque is another critical performance metric. The following torque results were observed during the dyno tests:
- Stock Downpipe Torque: The stock setup produced a torque figure of 400 lb-ft.
- Greddy Downpipe Torque: The new downpipe increased torque to 440 lb-ft.
- Torque Improvement: A gain of 40 lb-ft was recorded, enhancing the vehicle’s acceleration and responsiveness.
Sound and Driving Experience
Beyond numerical performance metrics, the Greddy downpipe also alters the sound profile of the A90 Supra. Drivers reported a more aggressive exhaust note, which enhances the overall driving experience.
Conclusion
The Greddy A90 Supra downpipe demonstrates substantial improvements in horsepower and torque, making it a valuable upgrade for enthusiasts looking to enhance their vehicle’s performance. With a gain of 35 HP and 40 lb-ft of torque, this downpipe not only improves power output but also enriches the driving experience with a more aggressive sound.
For those considering performance modifications for their A90 Supra, the Greddy downpipe is an excellent choice that delivers quantifiable results.