不等長サウンド→等長サウンドへ【BMW F82 M4】

KP garage

27 Jan 202417:05

Summary

TLDRThe video shows a conversation about modifying the exhaust of a BMW M4 sports car to improve the sound. They discuss the stock exhaust components and aftermarket parts like a new midpipe and V-band adapters. The owner wants to eliminate the unpleasant 'throaty' stock sound. They remove the stock midpipe and weld on a new one with V-bands. After installing the new exhaust, the owner is very pleased with the new aggressive sound, saying it no longer has the unpleasant 'throaty' tone.

Takeaways

🚗 The script discusses a BMW model, specifically the F82 M4, focusing on its exhaust system and modifications.
📢 Original exhaust parts are mentioned to be completely stock, with discussions on making the exhaust louder.
🏆 A racing component from "Tebis Racing" is mentioned, indicating a modification or aftermarket part installed on the vehicle.
🔨 The conversation includes technical details about the car's catalytic converter setup and how changing lengths in the exhaust system affects the sound, creating a "droning" noise.
🛠 Discussion on the direct-six (straight-six) engine configuration and how it's connected to the exhaust setup.
💵 Pricing for the aftermarket components is mentioned, suggesting affordability with costs around 100,000 yen for some parts, contrasting with more expensive upgrades for high-end vehicles.
💻 The importance of high-quality materials like stainless steel in the exhaust system is highlighted, alongside the advantages of lightweight piping.
🔧 The script touches on the technical process of modifying the exhaust system, including replacing parts and welding, to achieve a desired sound and performance.
👨‍🔧 Personal experiences and preferences in car modifications are shared, emphasizing the complexity and challenges in modifying high-end cars like BMWs.
💥 Final results of the modifications are discussed, with a noticeable improvement in exhaust sound and performance, leading to satisfaction with the project outcome.

Q & A

What car model is being discussed in the video?
-A BMW M4 F82.
What modifications are being done to the car?
-The stock exhaust system is being replaced with a custom titanium exhaust system with V-band connections.
Why are modifications being made to the exhaust system?
-To change the exhaust tone and eliminate the unwanted 'dro dro' resonance sound in the mid-rpm range.
What is the stock exhaust system configuration on the BMW M4?
-It has a 6-cylinder twin-turbo engine, with 2 exhaust pipes from each bank joining into one system.
What is the purpose of the V-bands being installed?
-The V-bands allow the system to be easily disconnected for future modifications or maintenance.
How does the new exhaust system change the sound?
-It eliminates the 'dro dro' resonance and makes the tone sharper and louder in the mid-rpm range under acceleration.
What special equipment is required for the exhaust work?
-An automotive lift, welding equipment, specialty exhaust fabrication tools, clamps and hangers.
How long does the exhaust system modification take?
-The complete job takes 2-3 hours with multiple technicians working.
What precautions are taken when modifying the exhaust?
-The exhaust components are allowed to cool before removal, and the car is raised safely on lifts.
What is the customer's reaction to the new exhaust sound?
-The customer is very pleased with the changed exhaust tone and lack of unwanted resonance.

Outlines

00:00

🚗 Exploring the BMW M4 F82 with Stock Exhaust

The video begins with an examination of a BMW M4 F82, highlighting its stock exhaust system. The presenter and a guest discuss the car's specifications, including its straight-six engine configuration and the impact of the exhaust on the car's sound. They highlight an aftermarket part from Tebbs Racing, intended to modify the exhaust's sound by changing the pipe's length and configuration, supposedly without altering the car's original performance characteristics. The conversation covers the cost-effectiveness of this modification compared to more expensive options and touches on the weight and material of different exhaust parts. The segment emphasizes the technical aspects of aftermarket exhaust systems, aiming to achieve a specific sound and performance profile without significant investments.

05:07

🔧 Installing Aftermarket Exhaust Components

In this section, the focus shifts to the technical process of installing aftermarket exhaust components on the BMW M4. The presenters discuss removing the original exhaust and replacing it with a new setup that includes a middle drum and changes to the catalytic converter. They cover the complexity of the installation process, noting the necessity of removing the entire exhaust system due to its integrated design. The discussion also touches on the challenges posed by the car's construction, including the use of heavy aluminum plates for reinforcement. The segment provides insights into the practical aspects of modifying a high-end vehicle's exhaust system, including the tools and techniques used to achieve the desired modifications.

10:08

🛠 Adjusting and Finalizing the Exhaust Modification

The final stage of the exhaust modification process involves precise adjustments to ensure proper fitment and performance. The presenters detail the cutting and welding required to install a V-band clamp, which offers flexibility and ease of adjustment compared to the original design. They discuss the importance of exact measurements and the use of a jig to ensure alignment during the modification. This section highlights the meticulous attention to detail required in customizing exhaust systems, focusing on achieving a balance between aesthetic appeal and functional performance. The completion of the installation marks a significant transformation in the vehicle's exhaust sound and performance characteristics.

15:09

🎶 Testing and Reviewing the Modified Exhaust

After the installation of the aftermarket exhaust components, the presenters test the car to evaluate the changes in sound and performance. They compare the modified exhaust's sound in different modes, noting a significant improvement in tone and the elimination of unwanted noise at certain RPMs. The review praises the enhanced auditory experience provided by the modifications, highlighting the technical success of the project. The segment concludes with a light-hearted discussion on the value of the modifications, measured in terms of the number of meals the savings could afford. The video ends with a teaser for future content, suggesting more automotive projects to come.

Mindmap

Keywords

💡BMW

BMW is a car brand that is the focus of the video. The video discusses a BMW M4 model, specifically the F82 type. BMW is mentioned throughout the script as the car being modified and discussed.

💡Muffler

A muffler is a part of a car's exhaust system that is designed to reduce the noise emitted by the engine. In the video, the muffler of the BMW M4 is being replaced with a different type that changes the sound and performance of the car.

💡OEM (Original Equipment Manufacturer)

OEM refers to the original parts and equipment that come with a car from the manufacturer. In the video, the OEM muffler and exhaust system are being discussed and compared to the aftermarket muffler that is being installed.

💡V-band

A V-band is a type of clamp used to secure exhaust system components together. In the video, the new muffler installation uses V-bands instead of the OEM slip-fit design, which allows for easier installation and removal.

💡Catalytic Converter

A catalytic converter is a device in a car's exhaust system that converts harmful pollutants into less toxic substances. The video mentions that the BMW M4 has two catalytic converters, and the new muffler installation will affect the length between them.

💡Drone

In the context of cars, drone refers to a low-frequency vibration or resonance that can occur in the exhaust system. The video mentions that the OEM muffler design can cause a droning sound, which is improved with the new muffler installation.

💡Raspy

Raspy is used to describe a rough or harsh quality of sound. In the video, the new muffler installation is said to produce a more raspy sound compared to the OEM muffler, which is likely a desired characteristic for the owner.

💡Tuning

Tuning refers to the process of adjusting or modifying a car to improve its performance, handling, or appearance. In the video, the muffler installation is considered a form of tuning or modifying the BMW M4 to achieve a different sound and exhaust performance.

💡Fabrication

Fabrication involves creating or modifying parts through various manufacturing processes. In the video, the muffler installation requires some fabrication, such as cutting and welding the exhaust pipes to fit the new components.

💡Exhaust

The exhaust is the system that carries the waste gases produced by a car's engine away from the vehicle. The video is focused on modifying the exhaust system of the BMW M4, specifically the muffler component, to change the sound and performance of the car.

Highlights

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