Exhaust Decibels
#1
Exhaust Decibels
Im going to Germany in Feb. I would like to upgrade my exhaust but I need to ensure I have an exhaust that doesnt go above 95dbs.
Does anyone know if any of the options out there stay below that but aids performance.
Does anyone know if any of the options out there stay below that but aids performance.
#2
What is more important? ---- Sound? or Performance?
The biggest restriction inhibiting performance are the catalytic converters.
Next are the exhaust manifolds, resonator & mufflers.
I believe that there would be a decibel restriction place on the muffler manufacturer by the government. So, above 95db is unlikely.
Hell, the government regulates how much water a toilet can be made to flush and that has to do with your personal exhaust so, I'm sure 'they' are up our car butts as well.
If you call the specific manufacturer, I'm sure they could provide some numbers.
You'll just have to decide wheather or not you want low mellow note or higher raspy note. How about 'modified stock' . . . hmmm . . . decisions, decisions . .
good luck,
The biggest restriction inhibiting performance are the catalytic converters.
Next are the exhaust manifolds, resonator & mufflers.
I believe that there would be a decibel restriction place on the muffler manufacturer by the government. So, above 95db is unlikely.
Hell, the government regulates how much water a toilet can be made to flush and that has to do with your personal exhaust so, I'm sure 'they' are up our car butts as well.
If you call the specific manufacturer, I'm sure they could provide some numbers.
You'll just have to decide wheather or not you want low mellow note or higher raspy note. How about 'modified stock' . . . hmmm . . . decisions, decisions . .
good luck,
#4
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Well, since he's asking about a sound restriction, it seems pretty obvious in his case the more important thing is sound.
I doubt it. There are so many variables that go into how loud a car's exhaust is that the muffler manufacturer wouldn't even try to give you a dB rating for a muffler. If they could do that, you would see it advertised.
#5
NOISE LEVELS
C-24. NOISE LEVELS OF MUFFLERS AND EXHAUST SYSTEMS
All exhaust systems (manufacturer installed, or after-market) of motorcycles and automobiles will be
inspected for noise levels according to the procedures in paragraph C-25. Motor vehicles exceeding the
noise level of 95 decibels will be rejected.
NOTE: Many after-market exhaust systems do not conform to German noise-level standards. When a
vehicle is rejected because the after-market system does not meet German standards, the owner must
remove the nonconforming exhaust system and replace it with the original factory equipment or a TÜVapproved
after-market system. If neither of these options is possible, the vehicle must be registered
nonoperational.
C-25. NOISE-LEVEL TESTING
A stationary test will be conducted as prescribed in ECE R 41, annex 3, paragraph 4, (available at
http://www.unece.org/trans/main/wp29...gs/r041r1e.pdf) or the Code of Federal Regulations, Title
40, volume 16, part 259 (available at http://www.nonoise.org/lawlib/cfr/40/40cfr205.htm), figures C-1
through C-3 and table C-2.
The drawing makes no sense to me really....
ITs on page 90 of this form at this website
aer190-1.pdf
C-24. NOISE LEVELS OF MUFFLERS AND EXHAUST SYSTEMS
All exhaust systems (manufacturer installed, or after-market) of motorcycles and automobiles will be
inspected for noise levels according to the procedures in paragraph C-25. Motor vehicles exceeding the
noise level of 95 decibels will be rejected.
NOTE: Many after-market exhaust systems do not conform to German noise-level standards. When a
vehicle is rejected because the after-market system does not meet German standards, the owner must
remove the nonconforming exhaust system and replace it with the original factory equipment or a TÜVapproved
after-market system. If neither of these options is possible, the vehicle must be registered
nonoperational.
C-25. NOISE-LEVEL TESTING
A stationary test will be conducted as prescribed in ECE R 41, annex 3, paragraph 4, (available at
http://www.unece.org/trans/main/wp29...gs/r041r1e.pdf) or the Code of Federal Regulations, Title
40, volume 16, part 259 (available at http://www.nonoise.org/lawlib/cfr/40/40cfr205.htm), figures C-1
through C-3 and table C-2.
The drawing makes no sense to me really....
ITs on page 90 of this form at this website
aer190-1.pdf
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The drawing makes no sense to me really....
ITs on page 90 of this form at this website
aer190-1.pdf
ITs on page 90 of this form at this website
aer190-1.pdf