Auspuff-Prototypen Test 🤓 auf dem Prüfstand. Was theoretisch raus kommen soll aber praktisch......

Summary

In this video, the creator tests and compares three different exhaust prototypes for improved motorcycle or scooter performance. Focused on power delivery, torque, and sound, the video provides in-depth insights into how each exhaust configuration impacts engine behavior. Alongside exhaust testing, there's an update on a motor rebuild following gearbox damage, with the creator discussing repairs and challenges faced. Viewers are encouraged to share their thoughts on the performance of each exhaust prototype.

Takeaways

• 😀 The video focuses on testing and comparing different exhaust systems for improved engine performance, specifically on scooters.
• 😀 The presenter shares the development and testing of several exhaust prototypes with the goal of optimizing power delivery and exhaust flow.
• 😀 Exhaust systems are tested for their impact on engine power, including differences in torque, power output, and RPM range.
• 😀 The Racing R exhaust provides more power at higher RPMs but less low-end torque, while the Nessi exhaust offers more low-end torque with a smoother power band.
• 😀 The presenter highlights the importance of exhaust design, including segment lengths and diffuser shapes, in affecting engine performance.
• 😀 Internal damping within the exhaust system, like the use of perforated surfaces or sound-absorbing materials, helps reduce noise while maintaining performance.
• 😀 The exhausts are tested on a dyno, and the performance curves are analyzed to compare horsepower and torque at various RPM ranges.
• 😀 The presenter explores modifications to the exhaust, such as changing the counter-cone length or adding a prallblech (baffle), which can alter the exhaust's sound and power characteristics.
• 😀 The impact of exhaust modifications on peak power and low-end torque is discussed, showing that there's often a trade-off between improving one and sacrificing the other.
• 😀 A main engine rebuild is also mentioned, with issues like a gearbox failure and a bent main shaft, which are being addressed with new parts and assembly.
• 😀 The video emphasizes the trial and error process in exhaust tuning, noting that even small changes to the exhaust layout can lead to significant differences in performance.

Q & A

What was the primary goal of the video?

The primary goal of the video was to test and compare different exhaust systems for a scooter or motorcycle, specifically focusing on prototypes to evaluate their performance in terms of power delivery, torque, and sound characteristics.

Which exhaust systems were tested in the video?

The video tested three exhaust systems: the Racing R, the Nessi, and a custom prototype that combined elements from both the Racing R and Nessi exhausts.

What were the key differences between the Racing R and the Nessi exhausts?

The Racing R exhaust is known for its higher peak power and revs at higher RPMs, while the Nessi exhaust offers a more balanced power delivery with increased torque at lower RPMs, making it more suited for street riding.

What modifications were made to the exhaust systems during testing?

Modifications included changes to the exhaust layout, such as incorporating a prallblech (reflection plate) and using inner insulation (Innendämmung) to reduce sound levels. These modifications aimed to balance power output and noise reduction.

How did the inner insulation affect the performance of the exhaust systems?

The inner insulation reduced the noise of the exhaust but slightly diminished the peak power. However, it helped create a smoother power band, especially in the mid-range, which is more useful for everyday street riding.

What did the dyno test reveal about the exhaust systems?

The dyno test revealed how different exhaust systems influenced peak power and torque. The Racing R showed a higher peak power, but the Nessi and the modified prototypes offered smoother torque delivery, especially at lower RPMs.

What issue was encountered during the motor rebuild, and how was it addressed?

During the motor rebuild, the main shaft was found to be bent, causing difficulty when shifting gears. As a result, the main shaft had to be replaced, which required disassembling the motor again to install the new part.

What led to the gearbox failure in the motor?

The gearbox failure occurred due to the rear bearings being damaged, which caused the housing to be deformed. The bearings were replaced, but other issues, such as the bent main shaft, were discovered later during the reassembly.

What did the presenter mention about the repair progress for the motor?

The presenter mentioned that despite the setback with the bent main shaft, the motor was being reassembled with new parts. They were excited to see the results of the rebuild and were looking forward to further testing once the motor was operational.

What is the importance of torque and power delivery in choosing an exhaust system for a scooter or motorcycle?

Torque and power delivery are crucial factors in choosing an exhaust system because they directly impact the performance of the vehicle. Torque is especially important for smooth acceleration and usability at lower RPMs, while peak power is important for top-end speed and performance. The choice depends on whether the rider prioritizes street performance or high-speed racing.