Tuning The Billet 4 Rotor Didn’t go as Expected

Summary

In this video, the team prepares a Mark 5 Supra for dyno testing, showcasing new modifications including a custom engine mount and improved fuel system components. Despite encountering some fuel pressure issues related to wiring, the engine runs smoothly, and initial performance is promising. The tuning process emphasizes careful calibration of fuel and timing for consistent results. The host expresses excitement about the car's drivability and future potential while highlighting ongoing challenges with the setup. Overall, the video captures the meticulous effort to enhance the Supra's performance and reliability.

Takeaways

• 😀 The Mark 5 Supra has a safe rev limit set at 10,000 RPM, making for an exciting day.
• 🛠️ A new engine mount has been installed, improving stability and performance.
• 💨 A catch can has been added to enhance engine breathing and prevent venting to the atmosphere.
• 🔧 The car was raised from a lowered position to ensure better drivability and alignment before dyno testing.
• ⚙️ The tuning process involves verifying all wiring and injector labels to ensure the ECU functions correctly.
• 🔥 EGT sensors are used to optimize fuel delivery to individual rotors, enhancing engine performance.
• 🔍 A fuel pressure issue was traced back to a ground connection error, leading to a thorough inspection of the fuel system.
• 📈 Initial dyno results showed similar power to the old engine, but adjustments will be made for optimal performance.
• 🔄 The car's tuning is conservative to ensure reliability during initial testing with the new wet sump setup.
• 🛠️ Ongoing diagnostics suggest potential fuel heating issues affecting performance, necessitating further investigation.

Q & A

What modifications were made to the engine mount?

A new engine mount was created, which greatly improves engine stability, resembling a wide BMX handlebar.

Why was a catch can added to the car?

The catch can was installed to prevent venting directly to the atmosphere, ensuring better management of engine vapors.

What issues were encountered during the dyno testing?

A fuel pressure issue was identified, which turned out to be a grounding problem related to a battery change.

How did the car's performance change after adjustments?

The drivability improved significantly; the car is now easier to handle at low speeds, making it feel more like a normal vehicle.

What was the purpose of checking the EGT sensors?

The EGT sensors are used to monitor exhaust gas temperatures, allowing for fine-tuning of fuel delivery across the engine's rotors.

What is the current state of the car's power output?

The car is currently producing around 465 horsepower, with potential for an additional 10 to 15 horsepower with further tuning.

What challenges are posed by the car's wiring?

The wiring presents peculiar issues that complicate troubleshooting and are not quick fixes, affecting overall performance.

What change was made to the fuel system to improve performance?

The team switched to a wet sump system, which has resolved previous oil pressure issues and improved reliability.

How does the tuning of the engine differ from the previous setup?

The current tuning is more conservative, operating at a higher air-fuel ratio, which prioritizes reliability over maximum power.

What is the next step for the car after these adjustments?

The plan is to conduct further tests and adjustments to ensure consistency and reliability before pushing for more power.