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The 1987 Chevy Square Body is a classic truck that has captured the hearts of many automotive enthusiasts. Known for its rugged design and reliability, this vehicle has become a favorite for restoration projects and performance upgrades. Recently, a dyno test revealed that a Square Body equipped with a 4L80E transmission gained an impressive 70 horsepower after a tuning session. This article delves into the details of the dyno test, the implications of the tuning, and what it means for owners of this iconic truck.
Understanding the 1987 Chevy Square Body
The Chevy Square Body trucks, produced from 1973 to 1987, are renowned for their boxy shape and robust performance. The 1987 model year marked the end of this generation, making it a sought-after classic. These trucks are often modified for better performance, making them popular candidates for engine tuning.
Key Features of the 1987 Chevy Square Body
- Strong frame and body structure
- Variety of engine options, including V6 and V8
- Customizable for performance and aesthetics
- Durable suspension system
The 4L80E Transmission
The 4L80E transmission is a heavy-duty automatic transmission that was introduced in the late 1980s. It is known for its strength and reliability, making it a popular choice for performance builds. This transmission can handle high horsepower and torque, which is essential for tuning applications.
Benefits of the 4L80E Transmission
- Four-speed automatic with overdrive
- Improved fuel efficiency compared to older transmissions
- Enhanced towing capacity
- Wide gear ratios for better acceleration
The Dyno Test: Methodology and Results
The dyno test was conducted to measure the horsepower and torque output of the 1987 Chevy Square Body after a tuning session. The vehicle was equipped with a stock engine and the 4L80E transmission prior to the tuning.
Testing Methodology
The testing process involved several steps:
- Baseline runs were conducted to establish initial horsepower and torque figures.
- ECU tuning was performed to optimize fuel maps and ignition timing.
- Post-tune runs were executed to measure the gains in horsepower and torque.
Dyno Test Results
The results of the dyno test were impressive:
- Initial horsepower: 250 hp
- Post-tune horsepower: 320 hp
- Torque increase: 50 lb-ft
- Total horsepower gain: 70 hp
Implications of the Tune
The significant increase in horsepower and torque after the tune has several implications for owners of the 1987 Chevy Square Body. It not only enhances performance but also improves driving experience and vehicle capability.
Performance Improvements
- Better acceleration and responsiveness
- Improved towing capacity
- Enhanced overall driving dynamics
Considerations for Owners
- Regular maintenance of the transmission is essential for optimal performance.
- Consider upgrading other components, such as the exhaust system, for further gains.
- Consult with a professional tuner to ensure the best results.
Conclusion
The dyno test of the 1987 Chevy Square Body with a 4L80E transmission demonstrates the potential for significant performance gains through tuning. With a 70 horsepower increase, owners can enjoy a more powerful and responsive driving experience. As the classic truck community continues to grow, tuning and performance upgrades will remain a popular topic among enthusiasts.