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MPI Exhaust Dyno Results

At MPI Exhaust Technologies, we take dynamometer testing very seriously. To ensure precise, accurate, and repeatable results that all our customers can rely on, our test vehicle maintains a stock configuration with a wide range of overall mileage. This meticulous approach ensures that the performance data we provide is both dependable and reflective of real-world conditions. Additionally, we never tune our test vehicles; all results are obtained with zero tuning, comparing only the stock exhaust versus the MPI Exhaust Cat-Back System.

Why Dyno Results Matter?

Why Dyno Results Matter?

We use wheel dyno testing consistently to ensure the highest possible performance increases in the mid to upper range without tuning. By testing multiple pipe sizes on specific engine options, we determine the optimal configuration for each engine. Our exhaust systems have undergone thousands of tests to achieve the impressive performance numbers we offer. Therefore, we only offer kits with our MPI mufflers series because they are designed to specify our system’s CFM and the performance range we aim for.

How Your Vehicle Adjusts to a New Exhaust System With No Tuning

How Your Vehicle Adjusts to a New Exhaust System With No Tuning

Your vehicle is designed to continuously learn and readjust to achieve the correct air-fuel ratio (AFR) for your specific driving conditions, even with the stock exhaust. When you install a new exhaust system, this learning process continues. During the first drive cycle with the new exhaust, your truck will adjust the short-term fuel trim (STFT) to adapt to the changes. Initially, you may notice a more aggressive and poppy exhaust tone. However, after several drive cycles, the ECU’s continuous adjustments will optimize the AFR, resulting in a smooth tone with fewer aggressive and poppy sounds.

Dyno & Testing FAQ

Category

Towing Benefits

Towing - When towing with a stock exhaust, the truck shifts at the bottom of the hill and runs at very high RPMs. However, with an MPI Exhaust, the truck can get halfway or three-quarters of the way up the same hill before shifting, thanks to the increased performance.

EGT Reduction - Our MPI Systems have such an increase in flow that they lower exhaust temperatures directly at the manifold by 150°F (65°C), helping to keep under-hood temperatures lower and save on costly manifold repairs.

Shifting - Shifting: With an MPI Exhaust, the truck gains more mid-range performance, reducing the need for constant shifting and high RPMs during towing compared to the stock system.

Pipe Size

We adjust our pipe diameter and total system volume when determining the proper CFM range an engine can produce. Ensuring the correct flow rate allows the engine to achieve significant performance gains. If the system has too much or too little flow, overall performance numbers decrease.

Frequently Asked Questions

Q: Will this cause a Check Engine Light?

  • A: No, the installation of the exhaust kit will not trigger the Check Engine Light as we do not relocate or modify the oxygen (O2) sensors in the exhaust system.

Q: Does this Affect my factory warranty?

  • A: Installing a cat-back exhaust system does not void the factory warranty as it is considered a permissible modification downstream of the engine monitoring systems.

Q: Will this work with other aftermarket "upgrades"?

  • A: We test exclusively against a stock truck configuration to ensure accurate gains, as results may vary with other aftermarket components.

Q: Will this affect emissions?

  • A: No, it will not have any effect on emissions when installed correctly.

HOW MPI EXHAUST SYSTEM GAIN MPG

2-4 MPG Increase Explained

2-4 MPG Increase Explained

MPG testing is challenging due to variables such as weather and fuel quality. Achieving consistent and repeatable results requires a large number of tests. In our testing, we’ve observed improvements ranging from 2 to 4 MPG. Vehicle mileage can also play a role; older vehicles with more wear and possibly less maintenance may experience lower gains. Similar to how auto manufacturers advertise MPG numbers, real-world results can vary.

MPI Turbo Series Vs MPI Performance Series

Performance VS Sound

Performance VS Sound

The MPI Muffler series can be used interchangeably in our MPI system based on sound preference while maintaining the high CFM range and volume needed. Despite their distinct configurations, both muffler designs deliver nearly identical performance, differing by only 0.70 horsepower.