DevonK
Well-Known Member
- Thread starter
- #1
Turns out the SAE noise compliance tests for both the AT and MT cars that the Z must pass differ in their required procedures quite signiificantly, and as a consequence the MT car has a slightly quieter exhaust:
https://jalopnik.com/the-2023-nissan-z-gets-a-louder-exhaust-with-the-automa-1848892692
The 2023 Nissan Z Gets a Louder Exhaust With the Automatic Transmission
The manual-transmission Z needed a quieter exhaust to pass the drive-by noise test, while the automatic gets
away with a louder muffler.
"I can’t tell you how the car drives just yet—the embargo lifts on May 16th. But when I sampled six-speed manual and nine-speed automatic versions of the new Z back-to-back, I noticed a difference in the exhaust sound, and conversations with Nissan employees confirmed my suspicion: The automatic is slightly louder.
That’s because engineers can tweak the automatic to pass drive-by noise tests while using an exhaust system that’s more vocal in everyday driving. Automotive noise regulations are complex, and vary from place to place, but let’s use California’s test as an example—it’s one of the most stringent in the U.S., and California is enthusiastic about enforcing it.
Rest of article at https://jalopnik.com/the-2023-nissan-z-gets-a-louder-exhaust-with-the-automa-1848892692
https://jalopnik.com/the-2023-nissan-z-gets-a-louder-exhaust-with-the-automa-1848892692
The 2023 Nissan Z Gets a Louder Exhaust With the Automatic Transmission
The manual-transmission Z needed a quieter exhaust to pass the drive-by noise test, while the automatic gets
away with a louder muffler.
"I can’t tell you how the car drives just yet—the embargo lifts on May 16th. But when I sampled six-speed manual and nine-speed automatic versions of the new Z back-to-back, I noticed a difference in the exhaust sound, and conversations with Nissan employees confirmed my suspicion: The automatic is slightly louder.
That’s because engineers can tweak the automatic to pass drive-by noise tests while using an exhaust system that’s more vocal in everyday driving. Automotive noise regulations are complex, and vary from place to place, but let’s use California’s test as an example—it’s one of the most stringent in the U.S., and California is enthusiastic about enforcing it.
Rest of article at https://jalopnik.com/the-2023-nissan-z-gets-a-louder-exhaust-with-the-automa-1848892692