SPECIALIST INSPECTS MY HOME BUILT SUPERCHARGED M3

Summary

The video follows Chris fixing up and modifying a salvaged BMW M3 he bought, including installing a supercharger kit. Despite initial issues, with help from experts he fixes underlying problems like a faulty coil pack. He upgrades parts like the engine mounts and replaces the rod bearings for preventative maintenance. After sorting issues the car finally goes on a dyno, producing over 600hp. The project highlights the risks and rewards of modifying a high mileage performance car.

Takeaways

• 😀 Chris bought a supercharged BMW M3 but it started having issues running properly after initial installation
• 👨‍🔧 With help from professionals, Chris found multiple issues like a broken coil pack causing misfires
• 🔧 They replaced worn rod bearings as preventative maintenance when removing the subframe
• ⚙️ Chris' exhaust was also upgraded with test pipes and carbon fiber tips by Modstock
• 🤔 Despite best efforts, Chris and Ethan's supercharger install had many errors the shop found
• ⛽ Fitting a new reservoir valve and sorting wiring issues got the M3 running well again
• 📈 On the dyno the supercharged M3 made over 600 horsepower after tuning fixes and a base map
• 👍 With some silly mistakes fixed, the M3 build was a success making lots more power
• 🔊 The exhaust sounded much improved as well to match the car's new supercharged engine
• 😃 Chris was happy with the 612 horsepower result and planned future content with the built M3

Q & A

What was the initial problem encountered after installing the supercharger kit on the E92 M3?

After the initial startup, which sounded good, the car began to run progressively worse, indicating a significant issue following the supercharger kit installation.

What diagnostic code was retrieved from the E92 M3, and what was its significance?

The diagnostic code retrieved was 27b0, indicating multiple potential issues with the vehicle, necessitating further investigation to identify and resolve the underlying problem.

Why was the battery replaced in the E92 M3, and what was the anticipated outcome?

The battery was replaced to rule out the possibility of a dead cell causing electrical issues throughout the vehicle. The outcome hoped for was a resolution to the starting and running problems.

What modifications were made to the exhaust system of the E92 M3?

Modifications included installing test pipes and a back box mod from Modstock to improve sound and ensure no issues with tuning, enhancing the car's performance and auditory experience.

What was identified as the primary issue causing the E92 M3's poor running condition?

A coil pack was found to be split in half, significantly impacting the car's performance. This issue was overlooked initially but was critical in resolving the car's running problems.

How did the video address the common issue of rod bearings in E92 M3s?

The video detailed the process of replacing the rod bearings, a known issue in E92 M3s that can lead to catastrophic engine damage, as a preventative measure to ensure the longevity and performance of the engine.

What was the outcome of the dyno tuning session for the E92 M3?

After resolving a misfire issue during the session, the dyno tuning successfully increased the car's power to 612 horsepower, significantly enhancing its performance.

What specific components were upgraded or inspected during the maintenance and tuning process?

Components upgraded or inspected included the battery, exhaust system (test pipes and back box mod), coil packs, rod bearings, and the supercharger kit's installation quality.

What was the reaction and plan after finding out the coil pack was damaged?

After discovering the damaged coil pack, it was promptly replaced, resolving the ignition issue and allowing the car to run on all cylinders, demonstrating a straightforward solution to a potentially complex problem.

What were the reasons for changing the oil and inspecting the rod bearings in the E92 M3?

Changing the oil and inspecting the rod bearings were precautionary measures to prevent excessive wear, which could lead to engine failure. This step was critical given the vehicle's high mileage and unknown history.