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The Tri-Five Chevys, produced between 1955 and 1957, have become iconic in the automotive world. These classic cars are beloved not only for their stylish designs but also for their performance potential. In this article, we will dive into dyno tests comparing stock and modified power numbers of Tri-Five Chevys, providing insights for enthusiasts and builders alike.
Overview of the Tri-Five Chevy
The Tri-Five series includes the Chevrolet 150, 210, and Bel Air models. These cars were equipped with various engines and features that appealed to a wide range of buyers. Understanding the stock specifications is crucial before diving into modifications.
Stock Specifications
Stock Tri-Five Chevys were typically equipped with inline-six or small-block V8 engines. Here’s a breakdown of the common stock engines:
- 1955: 265 cubic inch V8, 162 hp
- 1956: 265 cubic inch V8, 205 hp
- 1957: 283 cubic inch V8, 220 hp
Dyno Testing Methodology
In order to compare stock versus modified power numbers, we conducted dyno tests on several Tri-Five Chevys. The tests were performed under controlled conditions to ensure accuracy.
Testing Procedure
The following steps were taken during the dyno tests:
- Baseline dyno runs for stock vehicles
- Modification of vehicles with performance upgrades
- Follow-up dyno runs after modifications
Results of Dyno Tests
After conducting the dyno tests, we compiled the results to see how modifications impacted power output. Below are the findings from our tests.
Stock vs Modified Power Numbers
The following table summarizes the power numbers recorded during the tests:
- 1955 Stock: 162 hp vs Modified: 250 hp
- 1956 Stock: 205 hp vs Modified: 300 hp
- 1957 Stock: 220 hp vs Modified: 350 hp
Common Modifications for Tri-Five Chevys
Many enthusiasts choose to modify their Tri-Five Chevys to enhance performance. Here are some common modifications that yield significant power gains:
- Upgraded carburetors and fuel systems
- Performance camshafts
- High-performance exhaust systems
- Engine tuning and computer upgrades
Impact of Modifications on Performance
Modifications can drastically change the driving experience of a Tri-Five Chevy. The increase in horsepower often leads to:
- Improved acceleration
- Better throttle response
- Enhanced driving enjoyment
Conclusion
Tri-Five Chevys are a testament to classic American automotive design and engineering. The dyno tests reveal that with the right modifications, these vehicles can deliver impressive power numbers, enhancing both performance and driving pleasure. For enthusiasts looking to upgrade their Tri-Five, understanding the potential gains from modifications is essential.